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Numéro de publicationWO2004026888 A2
Type de publicationDemande
Numéro de demandePCT/US2003/029577
Date de publication1 avr. 2004
Date de dépôt19 sept. 2003
Date de priorité19 sept. 2002
Autre référence de publicationWO2004026888A3
Numéro de publicationPCT/2003/29577, PCT/US/2003/029577, PCT/US/2003/29577, PCT/US/3/029577, PCT/US/3/29577, PCT/US2003/029577, PCT/US2003/29577, PCT/US2003029577, PCT/US200329577, PCT/US3/029577, PCT/US3/29577, PCT/US3029577, PCT/US329577, WO 2004/026888 A2, WO 2004026888 A2, WO 2004026888A2, WO-A2-2004026888, WO2004/026888A2, WO2004026888 A2, WO2004026888A2
InventeursGrayson B. Lipford, Neeloffer Mookherjee, Lorne Babiuk, Robert Brownlie, Philip Griebel, George Mutwiri, Rolf Hecker
DéposantColey Pharmaceutical Gmbh, University Of Saskatchewan, Qiagen Gmbh
Exporter la citationBiBTeX, EndNote, RefMan
Liens externes:  Patentscope, Espacenet
Toll-like receptor 9 (tlr9) from various mammalian species
WO 2004026888 A2
Résumé
Novel amino acid and nucleotide sequences for rat, pig (porcine), cow (bovine), horse (equine), and sheep (ovine) Toll-­like receptor 9 (TLR9) are provided. Also provided are amino acid and nucleotide sequences for dog (canine), cat (feline), mouse (murine), and human TLR9. Comparison of these sequences, especially in combination with functional assessment for species-specific CpG motif preferences, permits identification of specific regions and amino acid residues of interest in TLR9 ligand interaction. Novel chimeric TLR9 receptor molecules, cells expressing these molecules, and methods for their use in screening assays for TLR9 ligands are also provided.
Revendications  (Le texte OCR peut contenir des erreurs.)
Claims
1. An isolated polypeptide comprising an amino acid sequence selected from the group SEQ DD NO:l, SEQ ED NO:5, SEQ DD NO:9, SEQ ED NO:13, and SEQ ED NO:17.
2. An isolated polypeptide comprising an amino acid sequence selected from the group SEQ ED NO:2, SEQ ED NO:6, SEQ DD NO: 10, SEQ DD NO:14, and SEQ DD NO:18.
3. An isolated nucleic acid molecule comprising a nucleic acid sequence encoding a polypeptide comprising an amino acid sequence selected from the group SEQ DD NO:l, SEQ
ID NO:5, SEQ ID NO:9, SEQ DD NO: 13, and SEQ DD NO: 17.
4. An isolated nucleic acid molecule comprising a nucleic acid sequence encoding a polypeptide comprising an amino acid sequence selected from the group SEQ ED NO:2, SEQ TD NO:6, SEQ DD NO: 10, SEQ DD NO: 14, and SEQ ID NO: 18.
5. A vector comprising the nucleic acid of any of claims 3-4.
6. A cell comprising the vector of claim 5.
7. An antibody or fragment thereof that binds specifically to the polypeptide of any of claims 1-2.
8. A method for identifying key amino acids in a TLR9 of a first species which confer specificity for CpG DNA optimized for TLR9 ofthe first species, comprising: aligning protein sequences of TLR9 of a first species, TLR9 of a second species, and TLR9 of a third species, wherein the TLR9 ofthe third species preferentially generates a signal when contacted with a CpG DNA optimized for TLR9 ofthe first species rather than when contacted with a CpG DNA optimized for TLR9 ofthe second species; generating an initial set of candidate amino acids in the TLR9 ofthe first species by excluding each amino acid in the TLR9 ofthe first species which (a) is identical with the TLR9 ofthe second species or (b) differs from the TLR9 ofthe second species only by conservative amino acid substitution; generating a refined set of candidate amino acids by selecting each amino acid in the initial set of candidate amino acids in the TLR9 ofthe first species which (a) is identical with the TLR9 ofthe third species or (b) differs from the TLR9 ofthe third species only by conservative amino acid substitution; and identifying as key amino acids in the TLR9 ofthe first species each amino acid in the refined set of candidate amino acids.
9. A method for identifying key amino acids in human TLR9 which confer specificity for CpG DNA optimized for human TLR9, comprising: aligning protein sequences of human TLR9, murine TLR9, and TLR9 of a third species, wherein the TLR9 ofthe third species preferentially generates a signal when contacted with a CpG DNA optimized for human TLR9 rather than when contacted with a CpG DNA optimized for murine TLR9; generating an initial set of candidate amino acids in human TLR9 by excluding each amino acid in human TLR9 which (a) is identical with murine TLR9 or (b) differs from murine TLR9 only by conservative amino acid substitution; generating a refined set of candidate amino acids by selecting each amino acid in the initial set of candidate amino acids in human TLR9 which (a) is identical with the TLR9 of the third species or (b) differs from the TLR9 ofthe third species only by conservative amino acid substitution; and identifying as key amino acids in human TLR9 each amino acid in the refined set of candidate amino acids.
10. The method according to claim 9, performed iteratively with a plurality of TLR9s derived from different species other than human and mouse, wherein for each TLR9 the refined set of candidate amino acids is assigned a weight, said weight corresponding to a ratio equal to (responsiveness to human-preferred CpG DNA)/(responsiveness to murine-preferred CpG DNA).
11. An isolated polypeptide comprising an amino acid sequence identical to SEQ DD NO:30 except for substitution of at least one key amino acid identifed according to the method of any of claims 9 or 10.
12. An isolated nucleic acid molecule comprising a nucleic acid sequence encoding a polypeptide according to claim 11.
13. A vector comprising the nucleic acid of claim 12.
14. A cell comprising the vector of claim 13.
15. An antibody that binds specifically to the polypeptide of claim 14.
16. A screening method to identify a TLR9 ligand, comprising: contacting a polypeptide according to any of claims 1, 2, or 11 with a candidate TLR9 ligand; measuring a signal in response to the contacting; and identifying the candidate TLR9 ligand as a TLR9 ligand when the signal in response to the contacting is consistent with TLR9 signaling.
17. The method of claim 16, wherein the signal comprises expression of a reporter gene responsive to TLR IL-IR signal transduction pathway.
18. The method of claim 17, wherein the reporter gene is operatively linked to a promoter sensitive to NF-κB.
19. The method of claim 17, wherein the candidate TLR9 ligand is an immunostimulatory nucleic acid.
20. The method of claim 19, wherein the immunostimulatory nucleic acid is CpG
DNA.
21. A screening method to identify species-specific CpG-motif preference of an isolated polypeptide of claim 2 or claim 11, comprising: contacting an isolated polypeptide of claim 2 or claim 11 with a CpG DNA comprising a hexamer sequence selected from the group consisting of GACGTT, AACGTT, CACGTT, TACGTT, GGCGTT, GCCGTT, GTCGTT, GATGTT, GAAGTT, GAGGTT, GACATT, GACCTT, GACTTT, GACGCT, GACGAT, GACGGT, GACGTC, GACGTA, and GACGTG; measuring a signal in response to the contacting; and identifying a species-specific CpG-motif preference when the signal in response to the contacting is consistent with TLR9 signaling.
22. The method of claim 21, wherein the signal comprises expression of a reporter gene responsive to TLR/IL-IR signal transduction pathway.
23. The method of claim 17, wherein the reporter gene is operatively linked to a promoter sensitive to NF-κB.
24. The method of claim 21, wherein the CpG DNA is an oligodeoxynucleotide having a sequence selected from the group consisting of TCCATGACGTTTTTGATGTT (SEQ DDNO:39),'
TCCATAACGTTTTTGATGTT (SEQ DDNO:40),
TCCATCACGTTTTTGATGTT (SEQ DDNO:41),
TCCATTACGTTTTTGATGTT (SEQ EDNO:42),
TCCATGGCGTTTTTGATGTT (SEQ IDNO:43), TCCATGCCGTTTTTGATGTT (SEQ ED NO:44),
TCCATGTCGTTTTTGATGTT (SEQ DDNO:45),
TCCATGATGTTTTTGATGTT (SEQ DDNO:46),
TCCATGAAGTTTTTGATGTT (SEQ ED NO:47),
TCCATGAGGTTTTTGATGTT (SEQ EDNO:48), TCCATGACATTTTTGATGTT (SEQ DDNO:49),
TCCATGACGTTTTTGATGTT (SEQ ED NO:50),
TCCATGACTTTTTTGATGTT (SEQ DDNO:51),
TCCATGACGCTTTTGATGTT (SEQ DDNO:52),
TCCATGACGATTTTGATGTT (SEQ DDNO:53), TCCATGACGGTTTTGATGTT (SEQ DDNO:54),
TCCATGACGTCTTTGATGTT (SEQ DD NO:55),
TCCATGACGTATTTGATGTT (SEQ EDNO:56), and
TCCATGACGTGTTTGATGTT (SEQ ID NO:57).
Description  (Le texte OCR peut contenir des erreurs.)

TOLL-LIKE RECEPTOR 9 (TLR9) FROM VARIOUS MAMMALIAN SPECIES

Background ofthe Invention

Synthetic oligodeoxynucleotides (ODN) and DNA containing immunostimulatory CpG motifs (CpG DNA) function as potent adjuvants and activators ofthe innate immune system. Heeg K et al. (2000) Int Arch Allergy Immunol 121 :87-97; Krieg AM (2001) Vaccine 19:618-22. A wide variety of CpG-containing sequences have been screened for biological activity and it is reported that optimal CpG DNA sequences can vary among species. Rankin R et al. (2001) Antisense Nucleic Acid Drug Dev 11:333-40. Toll-like receptor 9 (TLR9) has recently been identified as a receptor for CpG ODN.

Hemmi H et al. (2000) Nature 408:740-5. The molecular mechanism by which TLR9 recognizes CpG DNA is not understood.

Summary of the Invention Toll-like receptor 9 (TLR9) is known to be involved in innate immunity and to signal in response to CpG DNA. To date, the amino acid sequences only of human and murine TLR9 have been reported, and, interestingly, these two species are known to prefer different CpG motifs. The structural basis for this species-specific CpG motif preference has not yet been fully elucidated. The instant invention provides, in part, novel amino acid and nucleotide sequences of rat, pig, cow, and horse TLR9. These novel TLR9 sequences are useful for elucidating certain key structural features of TLR9. Specifically, comparison of sequences of murine, human, and these novel TLR9 sequences permits identification of areas of highly conserved sequence, areas of group conservation, and areas of hypervariability. In addition, such comparisons permit an assessment of evolutionary relatedness among TLR9 molecules ofthe various species, as well as an assessment of inter-species homologies.

Importantly, such comparisons permit a rational basis for identifying amino acids in TLR9 that may be involved in the CpG binding site, as well as amino acids involved in conferring species specificity for particular CpG motifs. Such information may be used to design and construct novel TLR9 molecules which incorporate specific point or regional mutations and which possess desired ligand binding characteristics. Such information may also be useful in designing and identifying novel ligands for TLR9 of a given species. In one aspect, the invention provides isolated polypeptides having amino acid sequences for rat, pig (porcine), cow (bovine), horse (equine), and sheep (ovine) TLR9 polypeptides. These amino acid sequences correspond to SEQ ID NOs 1, 5, 9, 13, and 17, respectively. Each of these sequences is believed to include at least a majority of an extracellular domain, as well as a transmembrane region and at least part of a TLR/IL-1 receptor (TIR) domain. To the extent any such sequence may lack an amino-terminal and/or carboxy-terminal sequence, such sequence is ascertainable, without undue experimentation, using conventional molecular biology techniques and the sequence information provided herein. In another aspect the invention provides isolated polypeptides having amino acid sequences for essentially the whole extracellular domain, optionally including a signal peptide, of each of rat, porcine, bovine, equine, and ovine TLR9. These amino acid sequences correspond to SEQ ID NOs 2, 6, 10, 14, and 18, respectively. Such extracellular domains are believed to include sequence specifically involved in binding to TLR9 ligand, such as CpG DNA. hi addition, such extracellular domains are believed to include sequence that confers species specificity for particular CpG motifs.

Isolated nucleic acid molecules encoding the polypeptides just described above are also provided according to further aspects ofthe invention. Such nucleic acid molecules include, but are not limited to, nucleic acid molecules having sequences provided by SEQ ID NOs 3, 7, 11, 15, 19; and 4, 8, 12, 16, and 20, respectively. Isolated nucleic acid molecules encoding the TLR9 polypeptides of SEQ ID NOs 1, 5, 9, 13, 17; and 2, 6, 10, 14, and 18 also include nucleic acid molecules that differ in sequence from SEQ ID NOs 3, 7, 11, 15, 19; and 4, 8, 12, 16, and 20, respectively, due to degeneracy ofthe genetic code. Such nucleic acid molecules will hybridize, under stringent conditions, with suitably selected nucleic acid molecules having sequences selected from SEQ ID NOs 3, 4, 7, 8, 11, 12, 15, 16, 19, and 20. In another aspect the invention provides a vector which includes an isolated nucleic acid molecule ofthe invention, hi one embodiment the vector is an expression vector and the isolated nucleic acid molecule ofthe invention is operably linked to a regulatory sequence in the vector. When present within a cell, an expression vector according to this aspect ofthe invention causes the cell to express a polypeptide ofthe invention.

The invention according to another aspect provides a cell in which a vector ofthe invention is present. In one embodiment the cell containing the vector expresses a polypeptide ofthe invention, h certain embodiments the cell also contains a reporter construct that transduces a TLR9-mediated signal in response to contact ofthe polypeptide of the invention or a TLR9 with a suitable TLR9 ligand. The cell containing the vector, and optionally containing the reporter construct, can be used in screening methods also provided by the invention.

In yet another aspect the invention provides an antibody or antibody fragment that binds specifically to an isolated polypeptide ofthe invention. In certain embodiments the antibody or antibody fragment binds uniquely to one of rat, porcine, bovine, equine, or ovine TLR9 polypeptide. More specifically, the antibody or antibody fragment binds uniquely to one ofthe isolated polypeptides ofthe invention. In one embodiment the antibody or antibody fragment that binds uniquely to one of rat, porcine, bovine, equine, or ovine TLR9 polypeptide also binds to either mouse or human TLR9. In another embodiment the antibody or antibody fragment that binds uniquely to one of rat, porcine, bovine, equine, or ovine TLR9 polypeptide does not also bind to either mouse or human TLR9. In some embodiments the antibody or antibody fragment binds selectively to a chimeric TLR9 polypeptide ofthe invention. In certain embodiments the antibody or antibody fragment ofthe invention is a monoclonal antibody or fragment of a monoclonal antibody.

In one aspect the invention provides a method for identifying key amino acids in a TLR9 of a first species which confer specificity for CpG DNA optimized for TLR9 ofthe first species. The method involves aligning protein sequences of TLR9 of a first species, TLR9 of a second species, and TLR9 of a third species, wherein the TLR9 ofthe third species preferentially generates a signal when contacted with a CpG DNA optimized for TLR9 ofthe first species rather than when contacted with a CpG DNA optimized for TLR9 ofthe second species; generating an initial set of candidate amino acids in the TLR9 ofthe first species by excluding each amino acid in the TLR9 ofthe first species which (a) is identical with the TLR9 ofthe second species or (b) differs from the TLR9 ofthe second species only by conservative amino acid substitution; generating a refined set of candidate amino acids by selecting each amino acid in the initial set of candidate amino acids in the TLR9 ofthe first species which (a) is identical with the TLR9 ofthe third species or (b) differs from the TLR9 ofthe third species only by conservative amino acid substitution; and identifying as key amino acids in the TLR9 ofthe first species each amino acid in the refined set of candidate amino acids. In another aspect the invention provides a method for identifying key amino acids in human TLR9 which confer specificity for CpG DNA optimized for human TLR9. The method according to this aspect ofthe invention involves aligning protein sequences of human TLR9, murine TLR9, and TLR9 of a third species, wherein the TLR9 ofthe third species preferentially generates a signal when contacted with a CpG DNA optimized for human TLR9 rather than when contacted with a CpG DNA optimized for murine TLR9; generating an initial set of candidate amino acids in human TLR9 by excluding each amino acid in human TLR9 which (a) is identical with murine TLR9 or (b) differs from murine TLR9 only by conservative amino acid substitution; generating a refined set of candidate amino acids by selecting each amino acid in the initial set of candidate amino acids in human TLR9 which (a) is identical with the TLR9 ofthe third species or (b) differs from the TLR9 ofthe third species only by conservative amino acid substitution; and identifying as key amino acids in human TLR9 each amino acid in the refined set of candidate amino acids. In one embodiment the method according to this aspect ofthe invention is performed iteratively with a plurality of TLR9s derived from different species other than human and mouse, wherem for each TLR9 the refined set of candidate amino acids is assigned a weight corresponding to a ratio equal to (responsiveness to human-preferred CpG DNA)/(responsiveness to murine-preferred CpG DNA).

In another aspect the invention also provides an isolated polypeptide having an amino acid sequence identical to SEQ ID NO:30 (extracellular domain (ECD) of murine TLR9) except for substitution of at least one key amino acid identified according to the method above. The polypeptide according to this aspect ofthe invention is a chimeric TLR9 polypeptide. Preferably the polypeptide according to this aspect ofthe invention binds to CpG DNA optimized for human TLR9 better than does the isolated polypeptide having an amino acid sequence identical to SEQ ID NO:30 (ECD of murine TLR9). In one embodiment the polypeptide includes only one substituted amino acid. The isolated polypeptide according to this aspect ofthe invention may further include sequence involved in TLR/IL-1R signal transduction, e.g., intracellular domain of TLR9 as provided in SEQ ID NOs 29 and 33. For example, in one embodiment a polypeptide according to this aspect of the invention is an isolated polypeptide having an amino acid sequence identical to SEQ ID NO:29 (full length murine TLR9) except for substitution of at least one key amino acid identified according to the method above. In another aspect the invention provides an isolated nucleic acid molecule including a nucleic acid sequence encoding a chimeric TLR9 polypeptide just described. In one embodiment the isolated nucleic acid molecule has a nucleic acid sequence encoding a chimeric TLR9 polypeptide just described. In yet another aspect, the invention provides a screening method to identify a TLR9 ligand. The method involves contacting a polypeptide (including a chimeric TLR9 polypeptide) ofthe invention with a candidate TLR9 ligand; measuring a signal in response to the contacting; and identifying the candidate TLR9 ligand as a TLR9 ligand when the signal in response to the contacting is consistent with TLR9 signaling. In one embodiment the candidate TLR9 ligand is an immunostimulatory nucleic acid. In one embodiment the candidate TLR9 ligand is a CpG DNA.

The invention also provides, in yet a further aspect, a screening method to identify species-specific CpG-motif preference of an isolated polypeptide ofthe invention. The method according to this aspect ofthe invention involves contacting an isolated polypeptide ofthe invention with a CpG DNA including a hexamer sequence selected from the group consisting of GACGTT, AACGTT, CACGTT, TACGTT, GGCGTT, GCCGTT, GTCGTT, GATGTT, GAAGTT, GAGGTT, GACATT, GACCTT, GACTTT, GACGCT, GACGAT, GACGGT, GACGTC, GACGTA, and GACGTG; measuring a signal in response to the contacting; and identifying a species- specific CpG-motif preference when the signal in response to the contacting is consistent with TLR9 signaling. In one embodiment the CpG DNA is an oligodeoxynucleotide having a sequence selected from the group consisting of

TCCATGACGTTTTTGATGTT (SEQ IDNO:39),

TCCATAACGTTTTTGATGTT (SEQ IDNO:40),

TCCATCACGTTTTTGATGTT (SEQ IDNO:41), TCCATTACGTTTTTGATGTT (SEQ H) NO:42),

TCCATGGCGTTTTTGATGTT (SEQ ID NO:43),

TCCATGCCGTTTTTGATGTT (SEQ IDNO:44),

TCCATGTCGTTTTTGATGTT (SEQ IDNO:45),

TCCATGATGTTTTTGATGTT (SEQ ID NO:46), TCCATGAAGTTTTTGATGTT (SEQ IDNO:47),

TCCATGAGGTTTTTGATGTT (SEQ ID NO:48),

TCCATGACATTTTTGATGTT (SEQ IDNO:49),

TCCATGACGTTTTTGATGTT (SEQ ID NO:50),

TCCATGACTTTTTTGATGTT (SEQ ID NO:51), TCCATGACGCTTTTGATGTT (SEQ ID NO:52),

TCCATGACGATTTTGATGTT (SEQ ID NO:53),

TCCATGACGGTTTTGATGTT (SEQ IDNO:54), TCCATGACGTCTTTGATGTT (SEQ LDNO:55), TCCATGACGTATTTGATGTT (SEQ ID NO:56), and TCCATGACGTGTTTGATGTT (SEQ IDNO:57).

In certain embodiments ofthe screening methods ofthe invention, the signal includes expression of a reporter gene responsive to TLR/IL-IR signal transduction pathway. In one embodiment the reporter gene is operatively linked to a promoter sensitive to NF-κB. In one embodiment the signal in response to contacting is binding ofthe candidate TLR9 ligand or CpG DNA to the polypeptide ofthe invention.

In one embodiment the screening method is performed on a plurality of test compounds. In one embodiment the response mediated by the TLR9 signal transduction pathway is measured quantitatively and the response mediated by the TLR9 signal transduction pathway associated with each ofthe plurality of test compounds is compared with a response arising as a result of an interaction between the functional TLR9 and a reference immunostimulatory compound.

Brief Description of the Figures

Figure 1 depicts a Clustal W multiple sequence alignment of deduced amino acid sequences for cat (feline), dog (canine), cow (bovine), mouse (murine), sheep (ovine), pig (porcine), horse (equine), human, and rat TLR9 polypeptides. The deduced amino acid sequences for feline, canine, bovine, murine, ovine, porcine, equine, human, and rat TLR9 polypeptides shown in the figure correspond to SEQ ID NOs 25, 21, 9, 29, 17, 5, 13, 33, and 1, respectively. Lines labeled "multiple" refer to the multiple sequence alignment of all six sequences shown. Lines labeled "mo/hu" refer to a paired sequence alignment of mouse and human TLR9 sequences alone. Figure 2 is a cladogram depicting an evolutionary relatedness tree for rat, murine, porcine, bovine, equine, and human TLR9 polypeptides in Figure 1.

Figure 3 is a graph depicting species specificity of TLR9 signaling with selected oligonucleotides having strong specificity for human (2006), mouse (5890), or neither (1982).

Detailed Description ofthe Invention

The present invention provides novel amino acid and nucleotide sequences for TLR9 derived from rat, pig, cow, horse, and sheep. These sequences can be used to identify key features ofthe primary sequences of these and related TLR molecules, including previously known primary sequences of human and mouse (murine) TLR9. Such key features include binding site information and species specificity toward particular CpG motifs. Native and novel chimeric TLR9 polypeptides designed with the aid of this information can be expressed in vitro or in vivo and used in screening assays to identify and to design novel TLR9 ligands. Additionally, the native and novel chimeric TLR9 polypeptides designed with the aid of this information can be expressed in vitro or in vivo and used in screening assays to compare various TLR9 ligands, including CpG DNA.

In one aspect the invention provides isolated TLR9 polypeptides, and isolated nucleic acid molecules encoding them, from rat, pig, cow, horse, and sheep. The term "isolated" as used herein with reference to a nucleic acid molecule or polypeptide means substantially free of or separated from components with which it is normally associated in nature, e.g., other nucleic acids, proteins, lipids, carbohydrates or in vivo systems to an extent practical and appropriate for its intended use. In particular, the nucleic acids or polypeptides are sufficiently pure and are sufficiently free from other biological constituents of host cells so as to be useful in, for example, producing pharmaceutical preparations. Because an isolated nucleic acid or polypeptide ofthe invention maybe admixed with a pharmaceutically acceptable carrier in a pharmaceutical preparation, the nucleic acid or polypeptide may represent only a small percentage by weight of such a preparation. The nucleic acid or polypeptide is nonetheless substantially pure in that it has been substantially separated from the substances with which it may be associated in living systems.

An amino acid sequence of rat TLR9 is provided as SEQ ID NO:l. Based on comparison with known amino acid sequences of human and murine TLR9, it appears that SEQ ID NO:l includes sequence for at least a majority ofthe extracellular domain, all ofthe transmembrane domain, and at least a portion ofthe intracellular domain of rat TLR9 (See Figure 1). Amino acids numbered 1-821 of SEQ ID NO:l are presumptively extracellular domain and correspond to SEQ ID NO:2. SEQ ID NO:3 is a nucleotide sequence of rat TLR9 cDNA having an open reading frame corresponding to nucleotides 1-3096. SEQ ID NO:4 is a nucleotide sequence of rat cDNA encoding amino acids 1-821 of SEQ ID NO:l. An amino acid sequence of porcine TLR9 is provided as SEQ ID NO:5. Based on comparison with known amino acid sequences of human and murine TLR9, it appears that SEQ ID NO: 5 includes sequence for at least a majority ofthe extracellular domain, all ofthe transmembrane domain, and at least a portion ofthe intracellular domain of porcine TLR9 (See Figure 1). Amino acids numbered 1-819 of SEQ ID NO:5 are presumptively extracellular domain and correspond to SEQ ID NO:6. SEQ ID NO:7 is a nucleotide sequence of porcine TLR9 cDNA having an open reading frame corresponding to nucleotides 77-3166. SEQ ID NO:8 is a nucleotide sequence of porcine cDNA encoding amino acids 1- 819 ofSEQ ID NO:5.

An amino acid sequence of bovine TLR9 is provided as SEQ ID NO:9. Based on comparison with known amino acid sequences of human and murine TLR9, it appears that SEQ ID NO:9 includes sequence for at least a majority ofthe extracellular domain, all ofthe transmembrane domain, and at least a portion ofthe intracellular domain of bovine TLR9 (See Figure 1). Amino acids numbered 1-818 of SEQ ID NO:9 are presumptively extracellular domain and correspond to SEQ ID NO: 10. SEQ ID NO:l 1 is a nucleotide sequence of bovine TLR9 cDNA having an open reading frame corresponding to nucleotides 84-3170. SEQ ID NO:12 is a nucleotide sequence of bovine cDNA encoding amino acids 1- 818 of SEQ ID NO:9. An amino acid sequence of equine TLR9 is provided as SEQ ID NO: 13. Based on comparison with known amino acid sequences of human and murine TLR9, it appears that SEQ ID NO:13 includes sequence for at least a majority ofthe extracellular domain, all ofthe transmembrane domain, and at least a portion ofthe intracellular domain of equine TLR9 (See Figure 1). Amino acids numbered 1-820 of SEQ ID NO: 13 are presumptively extracellular domain and correspond to SEQ ID NO: 14. SEQ LD NO: 15 is a nucleotide sequence of equine TLR9 cDNA having an open reading frame corresponding to nucleotides 115-3207. SEQ ID NO: 16 is a nucleotide sequence of equine cDNA encoding amino acids 1- 820 ofSEQ ID NO:13.

An amino acid sequence of ovine TLR9 is provided as SEQ ID NO:17. Based on comparison with known amino acid sequences of human and murine TLR9, it appears that SEQ ID NO:17 includes sequence for at least a majority ofthe extracellular domain, all ofthe transmembrane domain, and at least a portion ofthe intracellular domain of ovine TLR9 (See Figure 1). Amino acids numbered 1-818 of SEQ ED NO:17 are presumptively extracellular domain and correspond to SEQ DD NO: 18. SEQ ID NO: 19 is a nucleotide sequence of ovine TLR9 cDNA having an open reading frame corresponding to nucleotides 92-3178. SEQ DD NO:20 is a nucleotide sequence of ovine cDNA encoding amino acids 1-818 of SEQ DD NO:17. SEQD O:l(RatTLR9)

MVLCRRTLHP S VQAAVLAEA ALGT PAFLPCELKPHGLVDCN LFLKSVPHFSAAEPRSNITS SLIANRI HHLHN DFVHLPITVRQLN Ϊ NCPPPGLSP HFSCRMTIEPKTF AMRMLEELNLSY GITTVPRLPSSLTN SL SHTNILV DASS AG HSLRV FMDGNCYYKWPCNGAV.Tv'TPDAF GLSNLTH S KYNN TEVPRQ PPSLEYL LSYNLIV LGAEDLANLTS RM DVGGNCRRCDHAPD CTECRQKSLDLHPQTFHH SHIiEGLV KDSS HS N SK FQGLAM SV D SENFLYESINKTSAFQN TRLRKLD SFNYCKKVSFARLHLASSFKS VSLQELNMNGIF FRLLNK TLRWLAG PKLHTLH QlVrøFINQAQ SVFSTFRA RFVDLSlrøRISGPPTLSRVAPΞKADEAEKGVP PASLTPALPSTPVSKNFMVRCKNLRFTMD SRrø^ VLDLSYN D YHS SFSELPQLQALDLSYNSQPFSMQGIGHNFSF AN SRLQNLS AH DIHSRVSSRLYSTS VEYLDFSGNGVGR DEEDLY YFFQD RS IH D SQNKLHILRPQN NY P SLT LSFRDNH SFFN SS A F PNLRDLDLAGNL KA TNGTLPNGT LQ DVSSNSIVFWPAFFALAVE KEV SH I KTVDRS FGPIV MNLTV DVSSNPLHCACGAPFVO LLEVQT VPG ANGVKCGSPRQLQGRSIFΑQDLR C DDVLSRDCFGLSLL AVAVGTV PL QH CGWDV YCFHLCLA LPLLTRGRRSAQALPYDAFVVFDKAQSAVAD VYNΞLRVR EΞRRG RRA R__C ΞDRD LPGQTLFENL ASIYGSRKT FV AHTDKVSG LRTSF1-LAQQRLLEDRKDVVVLVILRPDA HRSRYVRLRQRLCRQSV FWPHQPNGQGSFWAQLSTALTRDNHHFYNRNFCRGPTAE

SEQ DD NO:2 (Rat TLR9)

MV CRRT HP S VQAAV AEALA GTLPAFLPCELKPHGLVDCNWLF KSVPHFSAAEPRSNITSLS IA RI HHLHN DFλ LPNVRQ N KWNCPPPGLSPLHFSCRMTIEPKTF AMRMLΞE NLSYNGITTVPRLPSSLTNLSL SHTNI V DASS AG HS RVLFMDGNCYYK^PCNGAVNVTPDAFLG SN THLS KYNNLTEVPRQ PPSLEY LSYN IVKLGAED Al.LTSLRMLDVGGNCRRCDHAPDLCTECRQKS D HPQTFHHLSHIαEG V KDSS HS N SP FQGLANLSV DLSENF YESINKTSAFQMLTR RKLD SFNYCKΪVSFARLH ASSFKS VSLQELNMMGIF FRLLNraJT R LAGLPKLHTLH QMMFINQAQLSVFSTFRALRFVDLSrø.RISGPPTLSRVAPΞKADEAΞKGVP PASLTPA PSTPVSia.FMVRCKl.LRFTMDLSRNNQVTI PEMFVl.LSHLQCLS SIINCIAQAVWGSQF PLTN K VLD SYNKLDLYHSKSFSΞLPQ QALDLSY_.SQPFSMQG1GHNFSFLA_.LSRLQWLSLA__NDIHSRVSSR YSTS VEYLDFSGNGVGRM DΞED YLYFFQDLRSLIH DLSQN LHI RPQNLNYLPKSLTK SFRDNHLSFFN SS A F PN RDLD AGNL KALTWGTLPNGTL Q LDVSSNSIVFλAPAFFALAVEL Eλ SH_.ILKTVDRS FGPIV NLTVLDVSSNPLHCACGAPFVD LLEVQTϊVPGLA GVKCGSPRQ QGRSIFAQDLR CLDDVLSRDCFG

SEQ DD NO:3 (Rat TLR9) atggttctctgtcgcaggaccctgcaccccttgtctctcctggtacaggccgcagtgctggctgaggctctggcc ctgggtaccctgcctgccttcctaccctgtgaactgaagcctcatggcctggtagactgcaactggctcttcctg aagtctgtgcctcacttctctgccgcagaaccccgttccaacatcaccagcctttccttgatcgccaaccgcatc caccacctgcacaacctcgactttgtccacctgcccaacgtgcgacagctgaacctcaagtggaactgtccgccc cctggcctcagccccttgcacttctcctgccgcatgaccattgagcccaaaaccttcctggctatgcgcatgctg gaagagctgaacctgagctataacggtatcaccactgtgccccgcctgcccagctccctgacgaatctgagccta agccacaccaacatcctggtactcgatgccagcagcctcgctggcctgcacagcctgcgagttctcttcatggac gggaactgctactacaagaacccctgcaacggggcggtgaacgtgaccccggacgccttcctgggcttgagcaac ctcacccacttgtcccttaagtataacaacctcacagaggtgccccgccaactgccccccagcctggagtacctc ctgctgtcctataacctcatcgtcaagctgggggccgaagacctagccaacctgacctcccttcgaatgcttgat gtgggtgggaattgccgtcgctgtgatcacgcccccgacctctgtacagaatgccggcagaagtcccttgatctg caccctcagactttccatcacctgagccaccttgaaggcctggtgctgaaggacagttctctccactcgctgaac tccaagtggttccagggtctggcgaacctctcggtgctggacctaagcgagaact tctctacgagagcatcaac aaaaccagcgcctttcagaacctgacccgtctgcgcaagctcgacctgtccttcaattactgcaagaaggtatcg ttcgcccgcctccacctggcaagttccttcaagagcctggtgtcgctgcaggagctgaacatgaacggcatcttc ttccgcttactcaacaagaacacgctcaggtggctggctggtctgcccaagctccacacgctgcaccttcaaatg aatttcatcaaccaggcgcagctcagcgtctttagtaccttccgagcccttcgctttgtggacctgtccaataat cgcatcagcgggcctccaacgctgtccagagtcgcccccgaaaaggcagacgaggcggagaagggggttccatgg cctgcaagtctcaccccagctctcccgagcactcccgtctcaaagaacttcatggtcaggtgtaagaacctcaga ttcaccatggacctgtctcggaacaaccaggtgactatcaagccagagatgttcgtcaacctctcccatctccag tgtctgagcctgagccacaactgcatcgcgcaggctgtcaatggctctcagttcctgccgctgaccaacctgaag gtgctggacctgtcctataacaagctggacctgtaccattcgaaatcgttcagtgagctcccacagttgcaggcc ctggacctgagctacaacagccagccattcagcatgcaggggataggccacaacttcagttttctggccaatctg tccaggttacagaaccttagcctggcacacaatgacattcacagccgcgtgtcctcacgcctctacagcacctca gtggagtatctggacttcagcggcaacggtgtgggccgcatgtgggacgaggaggacctttacctctatttcttc caagacctgagaagcctgattcatctggacctgtctcagaataagctgcacatcctccggccccagaacctcaac tacctccccaagagcctgacgaagctgagtttccgtgacaatcacctctctttctttaactggagcagtctggcc ttcctgcccaatctgcgagacctggacctggcaggcaatctactaaaggccctgaccaacggcaccctgcctaat ggcacgctcctccagaaactggatgtcagtagcaacagtatcgtctttgtggtcccagccttctttgctctggcg gtagagctaaaagaggtcaacctcagccataacatcctcaagactgtggatcgctcctggtttgggcccattgtg atgaacctgacggttctagacgtgagcagcaaccctctgcattgtgcctgcggtgcaccctttgtagacttactg ctggaagtgcagaccaaggtgcctggcctggctaacggtgtgaagtgtggcagtccccgccagctgcagggccgc agcatctttgcgcaagacctgcggctgtgcctggatgacgtcctttctcgggactgctttggcctttcactcctg gctgtggccgtgggcacggtgttgcctttactgcagcatctc gcggctgggacgtctggtactgtttccatctg tgcctggcatggctacctttgctgacccgtggccggcgcagcgcccaagctctcccttatgatgccttcgtggtg ttcgataaggcgcagagcgcggttgctgactgggtgtataacgagcttcgagtgcggctagaggagcggcgcggt cgccgagccctacgcttgtgtctggaggaccgagattggctgcctggccagacactcttcgagaacctctgggcc tccatctatggcagccgcaagactctgtttgtgctggcccacacggacaaggtcagtggcctcctgcgcaccagc ttcctgctggctcagcagcgcctgctggaggaccgcaaggacgtggtggtgttggtgatcctgcgccctgatgcc caccgctcccgctacgtgcgactgcgccagcgcctctgccgccagagtgtgctcttctggccccatcagcccaac gggcagggcagcttctgggcccagctgagtacagccctgactagggacaaccaccacttctataaccggaacttc tgccggggacctacagcagaatag

SEQ DD NO:4 (Rat TLR9) atggttctctgtcgcaggaccctgcaccccttgtctctcctggtacaggccgcagtgctggctgaggctctggcc ctgggtaccctgcctgccttcc accctgtgaactgaagcctcatggcctggtagactgcaactggctcttcctg aagtctgtgcctcacttctctgccgcagaaccccgttccaacatcaccagcctttccttgatcgccaaccgcatc caccacctgcacaacctcgactttgtccacctgcccaacgtgcgacagctgaacctcaagtggaactgtccgccc cctggcctcagccccttgcacttctcctgccgcatgaccattgagcccaaaaccttcctggctatgcgcatgctg gaagagctgaacctgagctataacggtatcaccactgtgccccgcctgcccagctccctgacgaatctgagccta agccacaccaacatcctggtactcgatgccagcagcctcgctggcctgcacagcctgcgagttctcttcatggac gggaactgctactacaagaacccctgcaacggggcggtgaacgtgaccccggacgccttcctgggcttgagcaac ctcacccacttgtcccttaagtataacaacctcacagaggtgccccgccaactgccccccagcctggagtacctc ctgctgtcctataacctcatcgtcaagctgggggccgaagacctagccaacctgacctcccttcgaatgcttgat gtgggtgggaattgccgtcgctgtgatcacgcccccgacctctgtacagaatgccggcagaagtcccttgatctg caccctcagactttccatcacctgagccaccttgaaggcctggtgctgaaggacagttctctccactcgctgaac tccaagtggttccagggtctggcgaacctctcggtgctggacctaagcgagaactttctctacgagagcatcaac aaaaccagcgcctttcagaacctgacccgtctgcgcaagctcgacctgtccttcaattactgcaagaaggtatcg ttcgcccgcctccacctggcaagttccttcaagagcctggtgtcgctgcaggagctgaacatgaacggcatcttc ttccgcttactcaacaagaacacgctcaggtggctggctggtctgcccaagctccacacgctgcaccttcaaatg aatttcatcaaccaggcgcagctcagcgtctttagtaccttccgagcccttcgctttgtggacctgtccaataat cgcatcagcgggcctccaacgctgtccagagtcgcccccgaaaaggcagacgaggcggagaagggggttccatgg cctgcaagtctcaccccagctctcccgagcactcccgtctcaaagaacttcatggtcaggtgtaagaacctcaga ttcaccatggacctgtctcggaacaaccaggtgactatcaagccagagatgttcgtcaacctctcccatctccag tgtctgagcctgagccacaactgcatcgcgcaggctgtcaatggctctcagttcctgccgctgaccaacctgaag gtgctggacctgtcctataacaagctggacctgtaccattcgaaatcgttcagtgagctcccacagttgcaggcc ctggacctgagctacaacagccagccattcagcatgcaggggataggccacaacttcagttttctggccaatctg tccaggttacagaaccttagcctggcacacaatgacattcacagccgcgtgtcctcacgcctctacagcacctca gtggagtatctggacttcagcggcaacggtgtgggccgcatgtgggacgaggaggacctttacctctatttcttc caagacctgagaagcctgattca ctggacctgtctcagaataagctgcacatcctccggccccagaacctcaac tacctccccaagagcctgacgaagctgagtttccgtgacaatcacctctctttctttaactggagcagtctggcc ttcctgcccaatctgcgagacctggacctggcaggcaatctactaaaggccctgaccaacggcaccctgcctaat ggcacgctcctccagaaactggatgtcagtagcaacagtatcgtctttgtggtcccagccttctttgctctggcg gtagagctaaaagaggtcaacctcagccataacatcctcaagactgtggatcgctcctggtttgggcccattgtg atgaacctgacggttctagacgtgagcagcaaccctctgcattgtgcctgcggtgcaccctttgtagacttactg ctggaagtgcagaccaaggtgcctggcctggctaacggtgtgaagtgtggcagtccccgccagctgcagggccgc agcatctttgcgcaagacctgcggctgtgcctggatgacgtcctttctcgggactgctttggc SEQ DD NO:5 (Porcine TLR9)

MGPRCTLHPLSL VQVTA AAALAQGRLPAFLPCELQPHG VNCN LF KSVPHFSAAAPRAMVTSLSLLSNRIH HLHDSDF'VH SSLRT l.LKWNCPPAG SPMHFPCHMTIEPNTFLAVPT EELNLSYl.SITTVPALPDSLVSLSLS RTNILVLDPTHLTGLIIALRYLYMDGNCYY-MPCQGALEAΛ/PGALLGLGNLTH S KYNN TEVPRS PPSLETL LSYiraiVT TPEDLAN TA RVLDVGGNCRRCDHARNPCRΞCPKDHPK HSDTFSHLSR EGLVLKDSSLYN DT RWFRGLDRLQVLD SENFLYDCITKTTAFQGLARLRSLNLSFNYHKKVSFAHLHLAPSFGH RS KΞLDMHGIFF RSLSETTLQPLVQLP QTLRLQlY_.FINQAQ SIFGAFPGLLYVD SD_miSGAARPVAITREV_-GRER"VWLPSR NLAPRPLDT RSEDFMPNC_0_FSFTLDLSRN_. VTIQSEMFAR SRLECLRLSH_.SISQAVNGSQFVPLTSLRV DLSHNKLDLYHGRSFTELPR EALDLSYNSQPFTMQGVGIINLSFVAQLPALRYLSLAHNDIHSRVSQQLCSAS C ALDFSGNDLSRM AEGD YLRFFQGLRSLV LDLSQ_raLHTL PRALDNLPKSLKHLHLRDN LAFFN SSLTLL P-C ET DLAGNQLIALSNGSLPSGTQLRR DLSGNSIGFVNPGFFA AKQ EELNLSANA KTVEPS FGSMVGN KVLDVSANPLHCACGATFVGF LEVQAAVPG PSRVKCGSPGQLQGHSIFAQDLRLCLDETLSWNCFGISLLAM ALG λΛ-PMLHH CG DL YCFHLCLA LPHRGQRRGADA FYDAFVVFDKAQSAVAD VYNELRVQLEERRGRRA LRLC EERD LPGKTLFENL ASVYSSRKT FVLAHTDRVSGLLRASFL AQQR EDRKDWVLVILRPDAYRS RYVR RQRLCRQSV L PHQPRGQGSFWAQLGTALTRD HHFYNRNFCRGPTTAE

SEQ DD NO:6 (Porcine TLR9)

MGPRCT HPLSLLVQVTALAAALAQGRLPAFLPCE QPHGLλ/NCNWLFL SVPHFSAAAPRANVTSLS LSNRIH HLHDSDFVH SSLRTLNLK NCPPAG SPMHFPCHMTIEPNTFLAVPTLEE N SY1.SITTVPALPDSLVSLS S RTNI VLDPTHLTGLI_ALRYLYMDGNCYY__I_"PCQGA E\A.PGALLGLGNLTHLSLKYN_.LTEVPRSLPPSLETL LSYNHIVTLTPED A TALRV DVGGNCRRCDHAR PCRECPKDHPKLHSDTFSH SRLEGLVLKDSSLYN DT R FRGLDRLQVLDLSENFLYDCITKTTAFQGLARLRSLNLSFMYHKKVSFAHLH APSFGH RS KELDMHGIFF RS SETTLQPLVQ PMLQTLRLQMNFINQAQ SIFGAFPGLLYVDLSDNRISGAARPVAITREVDGRERλ PSR NLAPRPLDTLRSEDFMPNCKAFSFTLD SRHNLVTIQSEMFAR SR EC RLSIlNSISQAVNGSQFVP TSLRVL DLSIiNK DLYHGRSFTELPRLEA DLSYNSQPFTMQGVGHNLSFVAQLPA RY SLAH-TOIHSRVSQQLCSASLC ALDFSGNDLSRM AEGD Y RFFQGLRS VW D SQNHLHT PRALDNLPKSLKHLH RDNNLAFFNWSSLTLL PK ETLDLAGMQLKALSNGSLPSGTQLRRLD SGNSIGFV PGFFALAKQLEELNLSA ALKTVEPS FGS VGN LKVLDVSAHP HCACGATFVGFLLEVQAAVPGLPSRVKCGSPGQ QGHSIFAQDLR C DΞTLS NCFG

SEQ ID NO:7 (Porcine TLR9) gagcacgaacatccttcactgtagctgctgcccggtctgccagccagaccctttggagaagaccccactccctgt catgggcccccgctgcaccctgcaccccctttctctcctggtgcaggtgacagcgctggctgcggctctggccca gggcaggctgcctgccttcctgccctgtgagctccagccccacggcctggtgaactgcaactggctcttcctgaa gtccgtgccccacttctcggcggcagcgccccgggccaacgtcaccagcctc ccttactctccaaccgcatcca ccacctgcacgactccgacttcgtccacctgtccagcctacgaactctcaacctcaagtggaactgcccgccggc tggcctcagccccatgcacttcccctgccacatgaccatcgagcccaacaccttcctggccgtgcccaccctgga ggagctgaacctgagctacaacagcatcacgaccgtgcctgccctgcccgactccctcgtgtccctgtcgctgag ccgcaccaacatcctggtgctagaccccacccacctcactggcctacatgccctgcgctacctgtacatggatgg caactgctactacaagaacccctgccagggggcgctggaggtggtgccgggtgccctcctcggcctgggcaacct cacacatctctcactcaagtacaacaatctcacggaggtgccccgcagcctgccccccagcctggagaccctgct gttgtcctacaaccacattgtcaccctgacgcctgaggacctggccaatctgactgccctgcgcgtgcttgatgt gggggggaactgccgccgctgtgaccatgcccgcaacccctgcagggagtgcccaaaggaccaccccaagctgca ctctgacaccttcagccacctgagccgcctcgaaggcctggtgttgaaagacagttctctctacaacctggacac caggtggttccgaggcctggacaggctccaagtgctggacctgagtgagaacttcctctacgactgcatcaccaa gaccacggccttccagggcctggcccgactgcgcagcctcaacctgtccttcaattaccacaagaaggtgtcctt tgcccacctgcacctggcaccctcctttgggcacctccggtccctgaaggagctggacatgcatggcatcttctt ccgctcgctcagtgagaccacgctccaacctctggtccaactgcctatgctccagaccctgcgcctgcagatgaa cttcattaaccaggcccagctcagcatctttggggccttccctggcctgctgtacgtggacctatcggacaaccg catcagcggagctgcaaggccagtggccattactagggaggtggatggtagggagagggtctggctgccttccag gaacctcgctccacgtccactggacactctccgctcagaggacttcatgccaaactgcaaggccttcagcttcac cttggacctgtctcggaacaacctggtgacaatccagtcggagatgtttgctcgcctctcacgcctcgagtgcct gcgcctgagccacaacagcatctcccaggcggtcaatggctctcagtttgtgccgctgaccagcctgcgggtgct ggacctgtcccacaacaagctggacctgtatcacgggcgctcgttcacggagctgccgcgcctggaagcactgga cctcagctacaatagccagccctttaccatgcagggtgtgggccacaacc cagcttcgtggcccagctgcccgc cctgcgctacctcagcctggcgcacaatgacatccatagccgagtgtcccagcagctctgtagcgcctcactgtg cgccctggactttagcggcaacgatctgagccggatgtgggctgagggagacctctatctccgcttcttccaagg cctaagaagcctagtctggctggacctgtcccagaaccacctgcacaccctcctgccacgtgccctggacaacct ccccaaaagcctgaagcatctgcatctccgtgacaataacctggccttcttcaactggagcagcctgaccctcct gcccaagctggaaaccctggacttggctggaaaccagctgaaggccctaagcaatggcagcctgccatctggcac ccagctgcggaggctggacctcagtggcaacagcatcggctttgtgaaccctggcttctttgccctggccaagca gttagaagagctcaacctcagcgccaatgccctcaagacagtggagccctcctggtttggctcgatggtgggcaa cctgaaagtcctagacgtgagcgccaaccctctgcactgtgcctgtggggcgaccttcgtgggcttcctgctgga ggtacaggctgccgtgcctgggctgcccagccgcgtcaagtgtggcagtccggggcagctccagggccatagcat ctttgcgcaagacctgcgcctctgcctggatgagaccctctcgtggaactgttttggcatctcgctgctggccat ggccctgggcctggttgtgcccatgctgcaccacctctgcggctgggacctctggtactgcttccacctgtgcct ggcctggctgccccaccgagggcagcggcggggcgcagacgccctgttctatgatgccttcgtggtctttgacaa agctcagagtgctgtggccgactgggtgtacaacgagctgcgggtgcagctggaggagcgccgtgggcgccgcgc actgcgcctgtgcctggaggagcgagactggttacctggcaagacgctcttcgagaacctgtgggcctcag cta cagcagccgcaagaccctgtttgtgctggcccacacggaccgtgtcagcggcctcttgcgtgccagtttcctgct ggcccagcagcgcctgctggaggaccgcaaggacgttgtagtgctggtgatcctgcgccccgatgcctaccgctc ccgctacgtgcggctgcgccagcgcctctgccgccagagtgtcctcctctggccccaccagccccgtgggcaggg cagcttctgggcccagctgggcacagccctgaccagggacaaccaccacttctataaccggaacttctgccgggg ccccacgacagccgaatagcactgagtgacagcccagttgccccagcccccctggatttgcctctctgcctgggg tgccccaacctgctttgctcagccacaccactgctctgctccctgttccccaccccaccccccagcctggcatgt aacatgtgcccaataaatgctaccggagggccaagaaaaaaaaaaaaaaaaa

SEQ DD NO:8 (Porcine TLR9) atgggcccccgctgcaccctgcaccccctttctctcctggtgcaggtgacagcgctggctgcggctctggcccag ggcaggctgcctgccttcctgccctgtgagctccagccccacggcctggtgaactgcaactggctcttcctgaag tccgtgccccacttctcggcggcagcgccccgggccaacgtcaccagcctctccttactctccaaccgcatccac cacctgcacgactccgacttcgtccacctgtccagcctacgaactctcaacctcaagtggaactgcccgccggct ggcctcagccccatgcacttcccctgccacatgaccatcgagcccaacaccttcctggccgtgcccaccctggag gagctgaacctgagctacaacagcatcacgaccgtgcctgccctgcccgactccctcgtgtccctgtcgctgagc cgcaccaacatcctggtgctagaccccacccacctcactggcctacatgccctgcgctacctgtacatggatggc aactgctactacaagaacccctgccagggggcgctggaggtggtgccgggtgccctcctcggcctgggcaacctc acacatctctcactcaagtacaacaatctcacggaggtgccccgcagcctgccccccagcctggagaccctgctg ttgtcctacaaccacattgtcaccctgacgcctgaggacctggccaatctgactgccctgcgcgtgcttgatgtg ggggggaactgccgccgctgtgaccatgcccgcaacccctgcagggagtgcccaaaggaccaccccaagctgcac tctgacaccttcagccacctgagccgcctcgaaggcctggtgttgaaagacagttctctctacaacctggacacc aggtggttccgaggcctggacaggctccaagtgctggacctgagtgagaacttcctctacgactgcatcaccaag accacggccttccagggcctggcccgactgcgcagcctcaacctgtccttcaattaccacaagaaggtgtccttt gcccacctgcacctggcaccctcctttgggcacctccggtccctgaaggagctggacatgcatggcatcttcttc cgctcgctcagtgagaccacgctccaacctctggtccaactgcctatgctccagaccctgcgcctgcagatgaac ttcattaaccaggcccagctcagcatctttggggccttccctggcctgctgtacgtggacctatcggacaaccgc a cagcggagctgcaaggccagtggccattactagggaggtggatggtagggagagggtctggctgccttccagg aacctcgctccacgtccactggacactctccgctcagaggacttcatgccaaactgcaaggccttcagcttcacc ttggacctgtctcggaacaacctggtgacaatccagtcggagatgtttgctcgcctctcacgcctcgagtgcctg cgcctgagccacaacagcatctcccaggcggtcaatggctctcagtttgtgccgctgaccagcctgcgggtgctg gacctgtcccacaacaagctggacctgtatcacgggcgctcgttcacggagctgccgcgcctggaagcactggac ctcagctacaatagccagccctttaccatgcagggtgtgggccacaacctcagcttcgtggcccagctgcccgcc ctgcgctacctcagcctggcgcacaatgacatccatagccgagtgtcccagcagctctgtagcgcctcactgtgc gccctggactttagcggcaacgatctgagccggatgtgggctgagggagacctctatctccgcttcttccaaggc ctaagaagcctagtctggctggacctgtcccagaaccacctgcacaccctcctgccacgtgccctggacaacctc cccaaaagcctgaagcatctgcatctccgtgacaataacctggccttcttcaactggagcagcctgaccctcctg cccaagctggaaaccctggacttggctggaaaccagctgaaggccctaagcaatggcagcctgccatctggcacc cagctgcggaggctggacctcagtggcaacagcatcggctttgtgaaccctggcttctttgccctggccaagcag ttagaagagctcaacctcagcgccaatgccctcaagacagtggagccctcctggtttggctcgatggtgggcaac ctgaaagtcctagacgtgagcgccaaccctctgcactgtgcctgtggggcgaccttcgtgggcttcctgctggag gtacaggctgccgtgcctgggctgcccagccgcgtcaagtgtggcagtccggggcagctccagggccatagcatc tttgcgcaagacctgcgcctctgcctggatgagaccctctcgtggaactgttttggc SEQ DD NO:9 (Bovine TLR9)

MGPYCAPHP SLLVQAAALAAALAEGTLPAF PCELQPHGQλ7DCN LFLKSVPHFSAGAPRA_7VTSLS ISNRIH HLHDSDFVHLSNLRV N K NCPPAGLSPMHFPCRMTIEPNTF AVPTLΞELN SYNGITTVPALPSS VSLSLS HTSILVLGPTHFTGLi LRFLYMDGNCYYMMPCPRALEVAPGALLGLGN THLSLKYN TEVPRRLPPSLDT L LSY_.HIVTLAPEDLA TALRVLDVGGNCRRCD__ARNPCRΞCP__WFPKLHPDTFSH SRLEGLVLKDSSLYKLEK D FRGLGRLQVLDLSENFLYDYITKTTIFNDLTQLRRLNLSFNYHKKVSFAHLH ASSFGS VS EKLDMHGIFF RSLTNITLQSLTR PKLQSLHLQ NFINQAQLSIFGAFPSLLFλDLSDNRISGAATPAAA GEVDSRVEV RLPR GLAPGPLDAVSSΪCDFMPSCNLNFTLDLSIINN VTIQQEMFTRLSR QCLRLSH SISQAVNGSQFVPLTSLRVLD LSHNKLDLYHGRSFTELPQLEALD SYNSQPFSMQGVGHNLSFVAQLPSLRYLSLAHNGIHSRVSQKLSSASLRA LDFSGNSLSQM AEGDLY CFFKG RNLVQLDLSENH HTLLPRHLDNLPKSLRQ R RD W AFFN SSLTVLP RLEA D AGNQLKALSNGS PPGIRLQK DVSSNSIGFVIPGFFVRATR IELNLSANALKTVDPS FGSLAGT KILDVSA PLHCACGAAFVDFLLERQEAVPGLSRRVTCGSPGQLQGRSIFTQDLR CLDETLSLDCFGLS LMVA LGLAVPMLHHLCG DL YCFHLCLAH PRRRRQRGEDTLLYDAVWFDKVQSAVADWVYNELRVQ EERRGRRA RLCLEERD PGKTLFENLWASVYSSRKTMFVLDHTDRVSG LRASFL AQQR EDRKD\ΛA.LVILRPAAYRSR YVRLRQR CRQSV L PHQPSGQGSF A LGIALTRDNRHFYNRNFCRGPTTAE

SEQ DD NO: 10 (Bovine TLR9)

MGPYCAPHPLS LVQAAA AAA AEGTLPAFLPCELQPHGQVDCN LFLKSVPHFSAGAPRANVTS S ISMRIH H HDSDFVHLSNLRV NLK NCPPAGLSPMHFPCR TIΞPNTFLAVPTLEELN SYNGITTVPALPSSLVSLSLS HTSILVLGPTHFTG HALRF YMDGNCYYMNPCPRALEVAPGALLG GNLTHLS KYNWLTEVPRRLPPS DTLL LSYMHIVTLAPΞDLAN TA RV DVGGNCRRCD__ARNPCRECPK_IFPKLHPDTFSHLSRLEGLVLKDSSLYKLEK D FRGLGRLQVLDLSENF YDYITKTTIF_TOLTQLRR NLSFNYHKKVSFAH H ASSFGS VSLEKLDMHGIFF RSLTMITLQS TRLPK QSLH QLNFINQAQLSIFGAFPSLLF'vXi SDNRISGAATPAAALGEVDSRVEV RLPR G APGPLDAVSS_αDFMPSCNLNFT DLSRM_- VTIQQEMFTRLSRLQCLRLSHNSISQAV_.GSQFVPLTSLRVLD S_ΪNK__,DLYHGRSFTE PQLEA D SYNSQPFSMQGVGHNLSFVAQLPSLRYLS A-_NGIHSRVSQK SSASLRA DFSGNSLSQ WAEGDLYLCFFKGLR LVQ DLSΞNHLHTLLPRH DN PKS RQLRLRDN1.LAFFN SS TV P R EALDLAGMQLIALSNGS PPGIR QKLDVSSNSIGFVIPGFFVRATRLIELNLSANALKTVDPS FGSLAGTL KILDVSANPLHCACGAAFVDF LΞRQEAVPGLSRRVTCGSPGQLQGRSIFTQD RLCLDΞTLS DCFG

SEQ DD NO:11 (Bovine TLR9) gggaagtgggcgccaagcatccttccctgcagctgcctcccaacctgcccgccagaccctctggagaagccgcat tccctgtcatgggcccctactgtgccccgcaccccctttctctcctggtgcaggcggcggcactggcagcggccc tggccgagggcaccctgcctgccttcctgccctgtgagctccagccccatggtcaggtggactgcaactggctgt tcctgaagtctgtgccgcacttttcggctggagccccccgggccaatgtcaccagcctctccttaatctccaacc gcatccaccacttgcatgactctgacttcgtccacctgtccaacctgcgggtcctcaacctcaagtggaactgcc cgccggccggcctcagccccatgcacttcccctgccgtatgaccatcgagcccaacaccttcctggctgtgccca ccctggaggagctgaacctgagctacaacggcatcacgaccgtgcctgccctgcccagttccctcgtgtccctgt cgctgagccacaccagcatcctggtgctaggccccacccacttcaccggcctgcacgccctgcgctttctgtaca tggacggcaactgctactacatgaacccctgcccgcgggccctggaggtggccccaggcgccctcctcggcctgg gcaacctcacgcacctgtcgctcaagtacaacaacctcacggaggtgccccgccgcctgccccccagcctggaca ccctgctgctgtcctacaaccacattgtcaccctggcacccgaggacctggccaacctgactgccctgcgcgtgc ttgacgtgggtgggaactgccgccgctgcgaccatgcccgcaacccctgcagggagtgcccaaagaacttcccca agctgcaccctgacaccttcagtcacctgagccgcctcgaaggcctggtgttgaaggacagttctctctacaaac tagagaaagattggttccgcggcctgggcaggctccaagtgctcgacctgagtgagaacttcctctatgactaca tcaccaagaccaccatcttcaacgacctgacccagctgcgcagactcaacctgtccttcaattaccacaagaagg tgtccttcgcccacctgcacctagcgtcctcctttgggagtctggtgtccctggagaagctggacatgcacggca tcttcttccgctccctcaccaacatcacgctccagtcgctgacccggctgcccaagctccagagtctgcatctgc agctgaacttcatcaaccaggcccagctcagcatctttggggccttcccgagcctgctcttcgtggacctgtcgg acaaccgcatcagcggagccgcgacgccagcggccgccctgggggaggtggacagcagggtggaagtctggcgat tgcccaggggcctcgctccaggcccgctggacgccgtcagctcaaaggacttcatgccaagctgcaacctcaact tcaccttggacctgtcacggaacaacctggtgacaatccagcaagagatgtttacccgcctctcccgcctccagt gcctgcgcctgagccacaacagcatctcgcaggcggttaatggctcccagttcgtgccgctgaccagcctgcgag tgctcgacctgtcccacaacaagctggacctgtaccatgggcgctcattcacggagctgccgcagctggaggcac tggacctcagctacaacagccagcccttcagcatgcagggcgtgggccacaacctcagcttcgtggcccagctgc cctccctgcgctacctcagccttgcgcacaatggcatccacagccgcgtgtcacagaagctcagcagcgcctcgt tgcgcgccctggacttcagcggcaactccctgagccagatgtgggccgagggagacctctatctctgctttttca aaggcttgaggaacctggtccagctggacctgtccgagaaccatctgcacaccctcctgcctcgtcacctggaca acctgcccaagagcctgcggcagctgcgtctccgggacaataacctggccttcttcaactggagcagcctgaccg tcctgccccggctggaagccctggatctggcaggaaaccagctgaaggccctgagcaacggcagcctgccgcctg gcatccggctccagaagctggacgtgagcagcaacagcatcggcttcgtgatccccggcttcttcgtccgcgcga ctcggctgatagagcttaacctcagcgccaatgccctgaagacagtggatccctcctggttcggttccttagcag ggaccctgaaaatcctagacgtgagcgccaacccgctccactgcgcctgcggggcggcctttgtggacttcctgc tggagagacaggaggccgtgcccgggctgtccaggcgcgtcacatgtggcagtccgggccagctccagggccgca gcatcttcacacaggacctgcgcctctgcctggatgagaccctctccttggactgctttggcctctcactgctaa tggtggcgctgggcctggcagtgcccatgctgcaccacctctgtggctgggacctctggtactgcttccacctgt gtctggcccatttgccccgacggcggcggcagcggggcgaggacaccctgctctatgatgccgtcgtggtcttcg acaaggtgcagagtgcagtggctgattgggtgtacaacgagctccgcgtgcagctggaggagcgccgggggcgcc gggcgctccgcctctgcctggaggagcgagactggctccctggtaagacgctcttcgagaacctgtgggcctcgg tctacagcagccgcaagaccatgttcgtgctggaccacacggaccgggtcagcggcctcctgcgcgccagcttcc tgctggcccagcagcgcctgttggaggaccgcaaggacgtcgtagtgctggtgatcctgcgccccgccgcctatc ggtcccgctacgtgcggctgcgccagcgcctctgccgccagagcgtcctcctctggccccaccagcccagtggcc agggtagtttctgggccaacctgggcatagccctgaccagggacaaccgtcacttctataaccggaacttctgcc ggggccccacgacagccgaatagcacagagtgactgcccag

SEQ DD NO: 12 (Bovine TLR9) atgggcccctactgtgccccgcaccccctttctctcctggtgcaggcggcggcactggcagcggccctggccgag ggcaccctgcctgccttcctgccctgtgagctccagccccatggtcaggtggactgcaactggctgttcctgaag tctgtgccgcacttttcggctggagccccccgggccaatgtcaccagcctctccttaatctccaaccgcatccac cacttgcatgactctgacttcgtccacctgtccaacctgcgggtcctcaacctcaagtggaactgcccgccggcc ggcctcagccccatgcacttcccctgccgtatgaccatcgagcccaacaccttcctggctgtgcccaccctggag gagctgaacctgagctacaacggcatcacgaccgtgcctgccctgcccagttccctcgtgtccctgtcgctgagc cacaccagcatcctggtgctaggccccacccacttcaccggcctgcacgccctgcgctttctgtacatggacggc aactgctactacatgaacccctgcccgcgggccctggaggtggccccaggcgccctcctcggcctgggcaacctc acgcacctgtcgctcaagtacaacaacctcacggaggtgccccgccgcctgccccccagcctggacaccctgctg ctgtcctacaaccacattgtcaccctggcacccgaggacctggccaacctgactgccctgcgcgtgcttgacgtg ggtgggaactgccgccgctgcgaccatgcccgcaacccctgcagggagtgcccaaagaacttccccaagctgcac cctgacaccttcagtcacctgagccgcctcgaaggcctggtgttgaaggacagttctctctacaaactagagaaa gattggttccgcggcctgggcaggctccaagtgctcgacctgagtgagaacttcctctatgactacatcaccaag accaccatcttcaacgacctgacccagctgcgcagactcaacctgtccttcaattaccacaagaaggtgtccttc gcccacctgcacctagcgtcctcctttgggagtctggtgtccctggagaagctggacatgcacggcatcttcttc cgctccctcaccaacatcacgctccagtcgctgacccggctgcccaagctccagagtctgcatctgcagctgaac ttcatcaaccaggcccagctcagcatctttggggccttcccgagcctgctcttcgtggacctgtcggacaaccgc atcagcggagccgcgacgccagcggccgccctgggggaggtggacagcagggtggaagtctggcgattgcccagg ggcctcgctccaggcccgctggacgccgtcagctcaaaggacttcatgccaagctgcaacctcaacttcaccttg gacctgtcacggaacaacctggtgacaatccagcaagagatgtttacccgcctctcccgcctccagtgcctgcgc ctgagccacaacagcatctcgcaggcggttaatggctcccagttcgtgccgctgaccagcctgcgagtgctcgac ctgtcccacaacaagctggacctgtaccatgggcgctcattcacggagctgccgcagctggaggcactggacctc agctacaacagccagcccttcagcatgcagggcgtgggccacaacctcagcttcgtggcccagctgccctccctg cgctacctcagccttgcgcacaatggcatccacagccgcgtgtcacagaagctcagcagcgcctcgttgcgcgcc ctggacttcagcggcaactccctgagccagatgtgggccgagggagacctctatctctgctttttcaaaggcttg aggaacctggtccagctggacctgtccgagaaccatctgcacaccctcctgcctcgtcacctggacaacctgccc aagagcctgcggcagctgcgtctccgggacaataacctggccttcttcaactggagcagcctgaccgtcctgccc cggctggaagccctggatctggcaggaaaccagctgaaggccctgagcaacggcagcctgccgcctggcatccgg ctccagaagctggacgtgagcagcaacagcatcggcttcgtgatccccggcttcttcgtccgcgcgactcggctg atagagcttaacctcagcgccaatgccctgaagacagtggatccctcctggttcggttccttagcagggaccctg aaaatcctagacgtgagcgccaacccgctccactgcgcctgcggggcggcctttgtggacttcctgctggagaga caggaggccgtgcccgggctgtccaggcgcgtcacatgtggcagtccgggccagctccagggccgcagcatcttc acacaggacctgcgcctctgcctggatgagaccctctccttggactgctttggc SEQ DD NO: 13 (Equine TLR9)

MGPCHGALQP SLLVQAAMLAVA AQGTLPPF PCE QPHGLVNCNW FLKSVPHFSAAAPRDNVTSLSL SNRI HHLHDSDFAQLSN QKLN K NCPPAG SPMHFPCH TIEPNTF AVPTLEELNLSYNGITTVPALPSS VSLIL SRTNI QLDPTSLTGL_IA RFLYMDGNCYYK.PCGRALEVAPGALLGLGNLTHLSLKYNNLTTVPRSLPPSLEYL LLSYNHIVT APED AN TALRVLDVGGNCRRCDHARNPCVECPHKFPQLHSDTFSH SRLEGLVLKDSSLYQ N PR FRGLGNLTVLD SENFLYDCITKTKAFQG AQLRRL.NLSFNYHKKVSFAH TLAPSFGSLLS QΞ DMHGIF FRSLSQKTLQPLARLP QRLYLQM FINQAQLGIFI-DFPGIRYID SDNRISGAVEPVATTGEVDGGKKVWLTS RDLTPGPLDTPSSEDFMPSCK SFTLD SRNWLVTVQPEMFAQ SRLQC R SHNSISQAVNGSQFVPLTS QV DLSHNKLD YHGRSFTELPRLEA DLSYNSQPFSMRGVGHNLSFVAQLPTLRYLSLAH GIHSRVSQQLCSTSL ALDFSGNSLSQM AEGD YLRFFQG RS IRLDLSQNR HT LPCT GNLPKS QLLRLRNNYLAFF WSS TL LPNLET DLAGNQ KALSNGS PSGTQLQRLDVSRNSIIFλA.PGFFALATR RELN SAMA RTEEPSWFGF AG SLEVLDVS_NPLHCACGAAFλ?DFLLQVQAAVPGLPSRVKCGSPGQLQGRSIFAQD RLCLDKSLS DCFGLSLLV VALGLAMPM HH CGWDL YCFHLGLA LPRRGWQRGADALSYDAFVVFDKAQSAVADWVYNELRVR EERRGRR A RLCLEERDWLPGKTLFENL ASVYSSRK FVLAHTDQVSG LRASFLLAQQRLLΞDRKDVλA/LVILSPDARR SRYVRLRQRLCRQSVLFWPHQPSGQRSF AQ GMALTRDNRHFYHQNFCRGPTMAE

SEQ DD NO: 14 (Equine TLR9)

MGPCHGALQP SLLVQAAM AVA AQGTLPPFLPCE QPHGLVNCN LFLKSVPHFSAAAPRDNVTSLS LSNRI HHLHDSDFAQ SNLQKLNLK NCPPAG SPMHFPCHMTIEPMTFLAVPTLEΞLN SYNGITTVPALPSS VSLIL SRTNILQLDPTS TG HALRF YMDGNCYYKNPCGRA EVAPGAL GLGNLTH SLKYNNLTTVPRSLPPSLEY SYNHIVTLAPEDLA LTALRV DVGGNCRRCDHARMPCVECPHKFPQLHSDTFSH SR EGLVLKDSS YQLN PR FRGLGNLTV DLSENF YDCITKTKAFQGLAQLRRLNLSFNYHKKVSFAHLTLAPSFGSL S QE DMHGIF FRSLSQKTLQPLARLPMLQRLYLQMNFINQAQ GIFKDFPGLRYID SDNRISGAVΞPVATTGEλπDGGKKV LTS RD TPGPLDTPSSEDFMPSC MLSFTLD SRNNLVTVQPEMFAQLSRLQCLR SHNSISQAVNGSQFVP TSLQV LDLSHNKLDLYHGRSFTELPR EALDLSYNSQPFS RGVGHNLSFVAQLPTLRYLSLAHNGIHSRVSQQLCSTSL ALDFSGNS SQM AEGD YLRFFQG RSLIRLD SQNRLHTLLPCTLGNLPKS QLLRLR NYLAFFN SS TL LPN ET DLAGNQLKALSNGS PSGTQLQRLDVSR SIIFWPGFFALATR RE NLSANA RTEΞPSWFGFLAG S EVLDVSANP HCACGAAFVDF LQVQAAVPG PSRVKCGSPGQLQGRSIFAQD RLCLDKSLSWDCFG

SEQ DD NO:15 (Equine TLR9) ctctgttctctgagctgttgccgcgtgaagggactgcgagcacaaagcatcctcctctgcagctgctgcccagtg tgccagctggaccctctggatcatctcccactccctgtcatgggcccttgccatggtgccctgcagcccctgtct ctcctggtgcaggcggccatgctggccgtggctctggcccaaggcaccctgcctcccttcctgccctgtgagctc cagccccacggcctggtgaactgcaactggctgttcctgaagtccgtgccccacttctcagcagcagcaccccgg gacaatgtcaccagcctttccttgctctccaaccgcatccaccacctccacgactccgactttgcccaactgtcc aacctgcagaaactcaacctcaaatggaactgcccgccagccggcctcagccccatgcacttcccctgccacatg accatcgagcccaacactttcctggctgtacccaccctggaggagctgaacctgagctacaacggcatcacgact gtgcctgccctgcccagctccctcgtgtccctgatcctgagccgcaccaacatcctgcagctagaccccaccagc ctcacgggcctgcatgccctgcgcttcctatacatggatggcaactgctactacaagaacccctgcgggcgggcc ctggaggtggccccaggcgccctccttggcctgggcaacctcacccacctgtcactcaagtacaacaacctcaca acggtgccccgcagcctgccccctagcctggagtacctgctgttgtcctacaaccacattgtcaccctggcacct gaggacctggccaatctgactgccctgcgtgtgctcgatgtgggtggaaactgccgccgctgtgaccatgcacgc aacccctgcgtggagtgcccacataaattcccccagctgcactccgacaccttcagccacctaagccgcctagaa ggcctcgtgttgaaggatagttctctctaccagctgaaccccagatggttccgtggcctgggcaacctcacagtg ctcgacctgagtgagaacttcctctacgactgcatcaccaaaaccaaggcattccagggcctggcccagctgcga agactcaacttgtccttcaattaccataagaaggtgtccttcgcccacctgacgctggcaccctccttcgggagc ctgctctccctgcaggaactggacatgcatggcatcttcttccgctcactcagccagaagacgctccagccactg gcccgcctgcccatgctccagcgtctgtatctgcagatgaacttcatcaaccaggcccagctcggcatcttcaag gacttccctggtctgcgctacatagacctgtcagacaaccgcatcagtggagctgtggagccggtggccaccaca ggggaggtggatggtgggaagaaggtctggctgacatccagggacctcactccaggcccactggacacccccagc tctgaggacttcatgccaagctgcaagaacctcagcttcaccttggacctgtcacggaacaacctggtaacagtc cagccagagatgtttgcccagctctcgcgcctccagtgcctgcgcctgagccacaacagcatctcgcaggcggtc aatggctcacagttcgtgccactgaccagcctgcaggtgctggacctgtcccataacaaactggacctgtaccat gggcgctcgtttacggagctgccgcgactggaggccctggacctcagctacaacagccagcccttcagcatgcgg ggtgtgggccacaacctcagctttgtggcccagctgcccaccctgcgctacctcagcctggcacacaatggcatc cacagccgtgtgtcccagcagctctgcagcacctcgctgtgggccctggacttcagcggcaattccctgagccag atgtgggctgagggagacctctatctccgcttcttccaaggcctgagaagcctaatccggctagacctgtcccag aatcgtctgcataccctcctgccatgcaccctgggcaacctccccaagagcttgcagctgctgcgtctccgtaac aattacctggccttcttcaattggagcagcctgaccctcctgcccaacctggaaaccctggacctggctggaaac cagctgaaggctctgagcaatggcagcctgccttctggcacccagctccagaggctggacgtcagcaggaacagc atcatcttcgtggtccctggcttctttgctctggccacgaggctgcgagagctcaacctcagtgccaacgccctc aggacagaggagccctcctggtttggtttcctagcaggctcccttgaagtcctagatgtgagcgccaaccctctg cactgcgcctgtggggcagcctttgtggacttcctgctgcaggttcaggctgccgtgcctggtctgcccagccgc gtcaagtgtggcagtccgggccagctccagggccgcagcatcttcgcacaagacctgcgcctctgcctggacaag tccctctcctgggactgttttggtctctcattgctggttgtggccctgggcctggccatgcctatgttgcaccac ctctgcggctgggacctctggtactgcttccacctgggcctggcctggctgccccggcgggggtggcagcggggc gcggatgccctgagctatgatgcctttgtggtcttcgacaaggcacagagcgcagtggccgactgggtgtacaat gaactgcgggtgcggctagaggagcgccgtgggcgccgggcgctccgcctgtgtctggaggagcgtgactggcta cctggcaagacgctgttcgaaaacctgtgggcctcagtctacagcagccgcaagatgctgtttgtgctggcccac acggaccaggtcagtggcctcttgcgtgccagcttcctgctggcccagcagcgtctgctggaggaccgcaaggac gttgtggtgctggtaatcctgagccctgacgcccgccgttcccgttacgtgcggctgcgccagcgcctctgccgc cagagtgtcctcttctggccccaccagcctagtggccagcgcagcttctgggcccagctaggcatggccctgacc agggacaaccgccacttctataaccagaacttctgccggggcccgacgatggctgagtagcacagagtgacagcc tggcatgtacaacccccagccctgaccttgcctctctgcctatgatgcccagtctgcctcactctgtgacgcccc tgctctgcctccgccaccctcacccctggcatacagcaggcactcaataaatgccactggcaggccaaacagcca aaaaaaaaaaaaaaaa

SEQ ID NO:16 (Equine TLR9) atgggcccttgccatggtgccctgcagcccctgtctctcctggtgcaggcggccatgctggccgtggctctggcc caaggcaccctgcctcccttcctgccctgtgagctccagccccacggcctggtgaactgcaactggctgttcctg aagtccgtgccccacttctcagcagcagcaccccgggacaatgtcaccagcctttccttgctctccaaccgcatc caccacctccacgactccgactttgcccaactgtccaacctgcagaaactcaacctcaaatggaactgcccgcca gccggcctcagccccatgcacttcccctgccacatgaccatcgagcccaacactttcctggctgtacccaccctg gaggagctgaacctgagctacaacggcatcacgactgtgcctgccctgcccagctccctcgtgtccctgatcctg agccgcaccaacatcctgcagctagaccccaccagcctcacgggcctgcatgccctgcgct cctatacatggat ggcaactgctactacaagaacccctgcgggcgggccctggaggtggccccaggcgccctccttggcctgggcaac ctcacccacctgtcactcaagtacaacaacctcacaacggtgccccgcagcctgccccctagcctggagtacctg ctgttgtcctacaaccacattgtcaccctggcacctgaggacctggccaatctgactgccctgcgtgtgctcgat gtgggtggaaactgccgccgctgtgaccatgcacgcaacccctgcgtggagtgcccacataaattcccccagctg cactccgacaccttcagccacctaagccgcctagaaggcctcgtgttgaaggatagttctctctaccagctgaac cccagatggttccgtggcctgggcaacctcacagtgctcgacctgagtgagaacttcctctacgactgcatcacc aaaaccaaggcattccagggcctggcccagctgcgaagactcaacttgtccttcaattaccataagaaggtgtcc ttcgcccacctgacgctggcaccctccttcgggagcctgctctccctgcaggaactggacatgcatggcatcttc ttccgctcactcagccagaagacgctccagccactggcccgcctgcccatgctccagcgtctgtatctgcagatg aacttcatcaaccaggcccagctcggcatcttcaaggacttccctggtctgcgctacatagacctgtcagacaac cgcatcagtggagctgtggagccggtggccaccacaggggaggtggatggtgggaagaaggtctggctgacatcc agggacctcactccaggcccactggacacccccagctctgaggacttcatgccaagctgcaagaacctcagcttc accttggacctgtcacggaacaacctggtaacagtccagccagagatgtttgcccagctctcgcgcctccagtgc ctgcgcctgagccacaacagcatctcgcaggcggtcaatggctcacagttcgtgccactgaccagcctgcaggtg ctggacctgtcccataacaaactggacctgtaccatgggcgctcgtttacggagctgccgcgactggaggccctg gacctcagctacaacagccagcccttcagcatgcggggtgtgggccacaacctcagctttgtggcccagctgccc accctgcgctacctcagcctggcacacaatggcatccacagccgtgtgtcccagcagctctgcagcacctcgctg tgggccctggacttcagcggcaattccctgagccagatgtgggctgagggagacctctatctccgcttcttccaa ggcctgagaagcctaatccggctagacctgtcccagaatcgtctgcataccctcctgccatgcaccctgggcaac ctccccaagagcttgcagctgctgcgtctccgtaacaattacctggccttcttcaattggagcagcctgaccctc ctgcccaacctggaaaccctggacctggctggaaaccagctgaaggctctgagcaatggcagcctgccttctggc acccagctccagaggctggacgtcagcaggaacagcatcatcttcgtggtccctggcttctttgctctggccacg aggctgcgagagctcaacctcagtgccaacgccctcaggacagaggagccctcctggtttggtttcctagcaggc tcccttgaagtcctagatgtgagcgccaaccctctgcactgcgcctgtggggcagcctttgtggacttcctgctg caggttcaggctgccgtgcctggtctgcccagccgcgtcaagtgtggcagtccgggccagctccagggccgcagc atcttcgcacaagacctgcgcctctgcctggacaagtccctctcctgggactgttttggt

SEQ ID NO:17 (Ovine TLR9) MGPYCAPHPLSLLVQAAALAAA AQGT PAFLPCELQPRG T^CN F KSVPRFSAGAPRANVTSLSLISNRIH H HDSDFVH SNLRVLNLfWNCPPAGLSPMHFPCRMTIEPNTF AVPTLEELNLSYNGITTVPALPSS VSLSLS RTSI VLGPTHFTGL__ALRFLYMDGNCYY_0_-PCQQAVEVAPGALLG1_GNLTHLSLKYNNLTEVPRRLPPS DT L SY_miITLAPEDLA_.LTALRV DVGGNCRRCDHARNPCRECP_aTFPKLHPDTFSH SRLEGLVL__DSS YKLEK DWFRGLGRLQVLD SENFLYDYITKTTIFRNLTQLRR NLSFNYHKKVSFAHLQLAPSFGGLVSLEKLDMHGIFF RSLTNTTLRPLTQLPK QSLSLQLNFINQAELSIFGAFPS LFλπDLSDNRISGAARPVAALGEVDSGVEVWRWPR GLAPGPLAAVSA__DFMPSCN NFTLDLSR_JN VTIQQEMFTR SRLQCLRLSHNSISQAV_.GSQFVPLTRLRVLD SYNKLDLYHGRSFTELPQ EALDLSYNSQPFSMQGVGHMLSFVAQLPS RYLS AHNGIHSRVSQKLSSASLRA DFSGNSLSQMWAΞGDLYLCFFKGLRNLVQLD SKNH HTL PRHLDNLPKS RQLR RD NLAFFN SSLTVLP QLEALDLAGNQLKALSNGS PPGTRLQKLDVSSNSIGFVTPGFFVLANRLKELNLSAMALKTVDPF FGRLTETL _JILDVSANPLHCACGAAFVDFL E QAAVPGLSRRVTCGSPGQLQGRSIFAQDLRLCLDET S DCFGFSLLMVA LGLAVPMLHH CG D WYCFHLCLAHLPRRRRQRGEDTLLYDAFWFDKAQSAVADWVYNELRVQ EERRGRRAL R CLEERD LPGKTLFENL ASVYSSRKTMFVLDHTDRVSG LRASF LAQQRLLEDRKDVW VILRPAAYRSR YVRLRQRLCRQSVLLWPHQPSGQGSF A LGMALTRDNRHFYNRNFCRGPTTAE

SEQ DD NO: 18 (Ovine TLR9)

MGPYCAPHP SL VQAAALAAA AQGTLPAFLPCELQPRGKV CNWLFLKSVPRFSAGAPRANVTSLSLISMRIH HLHDSDFVHLSNLRVLNLKWNCPPAG SPMHFPCR1VITIΞPNTFLAVPT EΞLNLSYNGITTVPALPSSLVS SLS RTSILVLGPTHFTGLIIΑLRFLYMDGNCYYΪNPCQQAVEVAPGA LGLGNLTHLSLKYKMLTΞVPRRLPPSLDTL LSY_raiITI_APED ANLTALRVLDVGGNCRRCD_IARNPCRΞCP_0_"FPKLHPDTFSHLSRLΞG V KDSSLYKLEK D FRGLGRLQVLDLSENFLYDYITKTTIFRNLTQ RRLNLSFNYHKKVSFAHLQLAPSFGGLVSLEK DMHGIFF RSLTNTT RPLTQ PKLQSLSLQLNFINQAELSIFGAFPSLLFVDLSDNRISGAARPVAA GEVDSGVΞVWRWPR GLAPGP AAVSA_ODFMPSCHLNFTLDLSR_MLVTIQQEMFTRLSRLQC RLSHNSISQAλπ_"GSQFVP TRLRVLD LSYWKLDLYHGRSFTΞLPQLEA DLSYNSQPFSMQGVGHN SFVAQLPS RYLSLAHNGIHSRVSQ SSASLRA DFSGMSLSQM AEGD Y CFFKG RNLVQLDLSKMHLHTL PRHLDN P SLRQLRLRDN AFFNWSS TV P QLEALDLAGNQLKA SNGSLPPGTR QKLDVSSNSIGFVTPGFFVLAMRLKELNLSAMALKTVDPFWFGRLTETL MILDVSANP HCACGAAFVDFLLEMQAAVPG SRRVTCGSPGQLQGRSIFAQDLR CLDETLS DCFG

SEQ ED NO:19 (Ovine TLR9) gtcggcacgggaagtgagcgccaagcatccttccctgcagctgccgcccaacttgcccgccagaccctctggaga agccgcattccctgccatgggcccctactgtgccccgcaccccctttctctcctggtgcaggcggcggcgctggc agcagccctggcccagggcaccctgcctgccttcctgccctgtgagctccagccccggggtaaggtgaactgcaa ctggctgttcctgaagtctgtgccgcgcttttcggccggagccccccgggccaatgtcaccagcctctccttaat ctccaaccgcatccaccacttgcacgactctgacttcgtccacctgtccaacctgcgggtcctcaacctcaagtg gaactgcccgccggccggcctcagccccatgcacttcccctgccgcatgaccatcgagcccaacaccttcctggc tgtgcccaccctggaggagctgaacctgagctacaatggcatcacgaccgtgcctgccctgcccagttctctcgt atccctgtcgctgagccgcaccagcatcctggtgctaggccccacccacttcaccggcctgcacgccctgcgctt tctgtacatggacggcaactgc actataagaacccctgccagcaggccgtggaggtggccccaggcgccctcct tggcctgggcaacctcacgcacctgtcgctcaagtacaacaacctcacggaggtgccccgccgcctgccccccag cctggacaccctgctgctgtcctacaaccacatcatcaccctggcacccgaggacctggccaatctgactgccct gcgtgtgcttgatgtgggcgggaactgccgccgctgcgaccacgcccgcaacccctgcagggagtgcccaaagaa cttccccaagctgcaccctgacaccttcagccacctgagccgcctcgaaggcctggtgttgaaggacagttctct ctacaaactagagaaagactggttccgcggcctgggcaggctccaagtgctcgacctgagtgagaacttcctcta tgactacatcaccaagaccaccatcttcaggaacctgacccagctgcgcagactcaacctgtccttcaattacca caagaaggtgtccttcgcccacctgcaactggcaccctcctttgggggcctggtgtccctggagaagctggacat gcacggcatcttcttccgctccctcaccaacaccacgctccggccgctgacccagctgcccaagctccagagtct gagtctgcagctgaacttcatcaaccaggccgagctcagcatctttggggccttcccgagcctgctcttcgtgga cctgtcggacaaccgcatcagcggagctgcgaggccggtggccgccctcggggaggtggacagcggggtggaagt ctggcggtggcccaggggcctcgctccaggcccgctggccgccgtcagcgcaaaggacttcatgccaagctgcaa cctcaacttcaccttggacctgtcacggaacaacctggtgacgatccagcaggagatgtttacccgcctctcccg cctccagtgcctgcgcctgagccacaacagcatctcgcaggcggttaatggctcgcagttcgtgccgctgacccg cctgcgagtgctcgacctgtcctacaacaagctggacctgtaccatgggcgctcgttcacggagctgccgcagct ggaggcactggacctcagctacaacagccagcccttcagcatgcagggcgtgggccacaacctcagcttcgtggc ccagctgccgtccctgcgctacctcagccttgcgcacaacggcatccacagccgcgtgtcacagaagctcagcag cgcctcgctgcgcgccctggacttcagcggcaactccctgagccagatgtgggccgagggagacctctatctctg cttcttcaaaggcttgaggaacctggtccagctggacctgtccaagaaccacctgcacaccctcctgcctcgtca cctggataacctgcccaagagcctgcggcagctgcgtctccgggacaataacctggccttcttcaactggagcag cctgactgttctgccccagctggaagccctggatctggcgggaaaccagctgaaggccctgagcaacggcagcct gccacctggcacccggctccagaagctggacgtgagcagcaacagcatcggctttgtgacccctggcttctttgt ccttgccaaccggctgaaagagcttaacctcagcgccaacgccctgaagacagtggatcccttctggttcggtcg cttaacagagaccctgaatatcctagacgtgagcgccaacccgctccactgtgcctgcggggcggcctttgtgga cttcctgctggagatgcaggcggccgtgcctgggctgtccaggcgcgtcacgtgtggcagtccgggccagctcca gggccgcagcatcttcgcacaggacctgcgcctctgcctggatgagaccctctccttggactgctttggcttctc gctgctaatggtggcgctgggcctggcggtgcccatgctgcaccacctctgtggctgggacctgtggtactgctt ccacctgtgtctggcccatttgccccgacggcggcggcagcggggcgaggacaccctgctctacgatgccttcgt ggtcttcgacaaggcgcagagtgcagtggccgactgggtgtacaacgagctccgcgtgcagctggaggagcgccg cgggcgccgggcgctccgcctctgcctggaggagcgagactggctccctggcaagacgctcttcgagaaccfcgtg ggcctcggtctacagcagccgtaagaccatgttcgtgctggaccacacggaccgggtcagtggcctcctgcgcgc cagcttcctgctggcccagcagcgcctgttggaggaccgcaaggatgtcgtggtgctggtgatcctgcgccccgc cgcctaccggtcccgctacgtgcggctgcgccagcgcctctgccgccagagcgtcctcctctggccccaccagcc cagtggccagggtagcttctgggccaacctgggcatggccctgaccagggacaaccgccacttctataaccggaa cttctgccggggccccacgacagccgaatagcacagagtgactgcccag

SEQ ID NO:20 (Ovine TLR9) atgggcccctactgtgccccgcaccccctttctctcctggtgcaggcggcggcgctggcagcagccctggcccag ggcaccctgcctgccttcctgccctgtgagctccagccccggggtaaggtgaactgcaactggctgttcctgaag tctgtgccgcgcttttcggccggagccccccgggccaatgtcaccagcctctccttaatctccaaccgcatccac cacttgcacgactctgacttcgtccacctgtccaacctgcgggtcctcaacctcaagtggaactgcccgccggcc ggcctcagccccatgcacttcccctgccgcatgaccatcgagcccaacaccttcctggctgtgcccaccctggag gagctgaacctgagctacaatggcatcacgaccgtgcctgccctgcccagtfcctctcgtatccctgtcgctgagc cgcaccagcatcctggtgctaggccccacccacttcaccggcctgcacgccctgcgctttctgtacatggacggc aactgctactataagaacccctgccagcaggccgtggaggtggccccaggcgccctccttggcctgggcaacctc acgcacctgtcgctcaagtacaacaacctcacggaggtgccccgccgcctgccccccagcctggacaccctgctg ctgtcctacaaccacatcatcaccctggcacccgaggacctggccaatctgactgccctgcgtgtgcttgatgtg ggcgggaactgccgccgctgcgaccacgcccgcaacccctgcagggagtgcccaaagaacttccccaagctgcac cctgacaccttcagccacctgagccgcctcgaaggcctggtgttgaaggacagttctctctacaaactagagaaa gactggttccgcggcctgggcaggctccaagtgctcgacctgagtgagaacttcctctatgactacatcaccaag accaccatcttcaggaacctgacccagctgcgcagactcaacctgtccttcaattaccacaagaaggtgtccttc gcccacctgcaactggcaccctcctttgggggcctggtgtccctggagaagctggacatgcacggcatcttcttc cgctccctcaccaacaccacgctccggccgctgacccagctgcccaagctccagagtctgagtctgcagctgaac ttcatcaaccaggccgagctcagcatctttggggccttcccgagcctgctcttcgtggacctgtcggacaaccgc atcagcggagctgcgaggccggtggccgccctcggggaggtggacagcggggtggaagtctggcggtggcccagg ggcctcgctccaggcccgctggccgccgtcagcgcaaaggacttcatgccaagctgcaacctcaacttcaccttg gacctgtcacggaacaacctggtgacgatccagcaggagatgtttacccgcctctcccgcctccagtgcctgcgc ctgagccacaacagcatctcgcaggcggttaatggctcgcagttcgtgccgctgacccgcctgcgagtgctcgac ctgtcctacaacaagctggacctgtaccatgggcgctcgttcacggagctgccgcagctggaggcactggacctc agetacaacagccagcccttcagcatgcagggcgtgggccacaacc cagettcgtggcccagctgccgtccctg cgctacctcagccttgcgcacaacggcatccacagccgcgtgtcacagaagctcagcagcgcctcgctgcgcgcc ctggacttcagcggcaactccctgagccagatgtgggccgagggagacctctatctctgcttcttcaaaggcttg aggaacctggtccagctggacctgtccaagaaccacctgcacaccctcctgcctcgtcacctggataacctgccc aagagcctgcggcagctgcgtctccgggacaataacctggccttcttcaactggagcagcctgactgttctgccc cagc ggaagccctggatctggcgggaaaccagctgaaggccctgagcaacggcagcctgccacctggcacccgg ctccagaagctggacgtgagcagcaacagcatcggctttgtgacccctggcttctttgtccttgccaaccggctg aaagagcttaacctcagcgccaacgccctgaagacagtggatcccttctggttcggtcgcttaacagagaccctg aatatcctagacgtgagcgccaacccgctccactgtgcctgcggggcggcctttgtggacttcctgctggagatg caggcggccgtgcctgggctgtccaggcgcgtcacgtgtggcagtccgggccagctccagggccgcagcatcttc gcacaggacctgcgcctctgcctggatgagaccctctccttggactgctttggc

Complete nucleotide and amino acid sequences for canine and feline TLR9 are publicly availiable. For example, an amino acid sequence for canine TLR9 is available as GenBank accession number BAC65192 and its corresponding nucleotide sequence is available as GenBank accession number ABI 04899. An amino acid sequence for feline TLR9 is available as GenBank accession number AAN15751 and its corresponding nucleotide sequence is available as GenBank accession number AY137581. Complete nucleotide and amino acid sequences for canine and feline TLR9 were also determined independently from those available from public databases.

An amino acid sequence of canine TLR9 is provided as SEQ DD NO:21. Based on comparison with known amino acid sequences of human and murine TLR9, it appears that SEQ ED NO:21 includes sequence for at least a majority ofthe extracellular domain, all ofthe transmembrane domain, and at least a portion ofthe intracellular domain of canine TLR9 (See Figure 1). Amino acids numbered 1-822 of SEQ ED NO:21 are presumptively extracellular domain and correspond to SEQ ID NO:22. SEQ ID NO:23 is a nucleotide sequence of canine TLR9 cDNA having an open reading frame corresponding to nucleotides 91-3186. SEQ ID NO:24 is a nucleotide sequence of canine cDNA encoding amino acids 1- 822 of SEQ ID NO:21.

An amino acid sequence of feline TLR9 is provided as SEQ ID NO:25. Based on comparison with known amino acid sequences of human and murine TLR9, it appears that SEQ ED NO:25 includes sequence for at least a majority ofthe extracellular domain, all ofthe transmembrane domain, and at least a portion ofthe intracellular domain of feline TLR9 (See Figure 1). Amino acids numbered 1-820 of SEQ DD NO:25 are presumptively extracellular domain and correspond to SEQ DD NO:26. SEQ DD NO:27 is a nucleotide sequence of feline TLR9 cDNA having an open reading frame corresponding to nucleotides 87-3179. SEQ DD NO:28 is a nucleotide sequence of feline cDNA encoding amino acids 1-820 of SEQ DD NO:25.

SEQ DD NO:21 (Canine TLR9)

MGPCRGALHPLS LVQAAALALALAQGT PAFLPCELQPHGLVNCNWLF KSVPRFSAAAPRGNVTSLSLYSNRI HHLHD DFVHFVHLRRLNLK NCPPASLSPMHFPCHMTIEPNTFLAVPTLEDLNLSYNSITTVPA PSSLVSLS SRTNILV DPAT AGLYALRFLF DGNCYYKNPCQQALQVAPGALLGLGN THLS KYN LTλAPRG PPSIiEY L SYNHIIT APΞDLA LTALRVLDVGGNCRRCDHARNPCRECPKGFPQ HPWTFGHLSH EGLVIJRDSSLYSLD

PR FHG GNLMVLDLSENFLYDCITKTKAFYG ΆRLRRLN SFNYHKKVSFAHLHLASSFGSLLS QELDIHGIF FRSLSKTTLQSLAHLPM QR HLQ NFISQAQLSIFGAFPGLRYVD SDMRISGAAEPAAATGEVEADCGERA .P QSRD A GPLGTPGSEAFMPSCRT NFTLDLSRNNVTVQPΞMFVRLARLQC GLSHNSISQAVMGSQFVP S-I RVDLSHMID YHGRSFTE PRLEALDLSYNSQPFSMRGVGHNLSFVAQ PALRYLSLAHNGIHSRVSQQLRSA SLRALDFSGNTLSQMAEGD YLRFFQG RS VQ DLSQNR HTLLPR LDN PKSLRL RLRDNYLAFFN SSL ALLP_Α_EALDLAGNQLKALSNGSLPNGTQ QRLDLSGNSIGFVVPSFFALAVRLRELNLSANALKTVEPS FGSL AGALKVLDVTANP HCACGATFVDFLLEVQAAVPG PSRVKCGSPGQLQGRSIFAQDLRLC DEALS VCFSLSL LAVALSLAVPMLHQLCG DL YCFHIIC A PRRGRRRGVDALAYDAFWFDKAQSSVAD VYNE RVQLEERRG RRALRLC EERD VPGKTLFEN ASVYSSRKTLFVLARTDRVSG LRASFLLAQQR LEDRKDVΛTVLVILCPDA HRSRYVRLRQRLCRQSVL PHQPSGQRSFWAQLGTALTRDMRHFYNQNFCRGPTTA

SEQ ED NO:22 (Canine TLR9)

MGPCRGALHPLS VQAAALALA AQGT PAFLPCE QPHGLA7 CN F KSVPRFSAAAPRGNVTS S YSNRI HH HDYDFVHFVHLRRLNLKWNCPPAS SPMHFPCHMTIEPNTFLAVPT EDLN SYNSITTVPALPSSLVSLS SRTNILVLDPAT AGLYALRFLFLDGNCYYKNPCQQALQVAPGALLG GN THLSLKYNN TVVPRGLPPSLEY LLSYNHIITLAPEDLANLTALRV DVGGNCRRCDHARNPCRECPKGFPQLHPNTFGH SHLEG VLRDSSLYSLD PR FHGLGNLMVLDLSΞNFLYDCITKTKAFYG ARLRRLN SFNYHKKVSFAH HLASSFGSL SLQE DIHGIF FRSLSKTT QSLAHLPMLQRLH QLNFISQAQLSIFGAFPGLRYVDLSDNRISGAAEPAAATGEVΞADCGERVWP QSRDLALGPLGTPGSEAFMPSCRTLNFTLDLSRHMLVTVQPΞ FVR ARLQCLGLS__NSISQAV_.GSQFVPLSNL RV DLSHNKLDLYHGRSFTΞ PRLEALDLSYNSQPFSMRGVGHNLSFVAQLPA RY SLAHNGIHSRVSQQLRSA SLRALDFSGNTLSQM AEGDLY RFFQG RSLVQ DLSQNRLHT LPRNLDW PKSLRLLRLRDNY AFFN SS ALLPK EALD AGNQLKALSNGSLPNGTQLQRLDLSGNSIGFWPSFFA AVRLRELMLSANALKTVEPS FGSL AGALKVLDVTAWP HCACGATFVDFL EVQAAVPG PSRVKCGSPGQLQGRSIFAQDLRLCLDEALS VCFS

SEQ ID NO:23 (Canine TLR9) aggaaggggctgtgagctccaagcatcctttcctgcagctgctgcccagcctgccagccagaccctctggagaag cccccgctccctgtcatgggcccctgccgtggcgccctgcaccccctgtctctcctggtgcaggctgccgcgcta gccctggccctggcccagggcaccctgcctgccttcctgccctgtgagctccagccccatggcctggtgaactgc aactggctgttcctcaagtccgtgccccgcttctcggcagctgcaccccgcggtaacgtcaccagcctttccttg tactccaaccgcatccaccacctccatgactatgactttgtccacttcgtccacctgcggcgtctcaatctcaag tggaactgcccgcccgccagcctcagccccatgcactttccctgtcacatgaccattgagcccaacaccttcctg gctgtgcccaccctagaggacctgaatctgagctataacagcatcacgactgtgcccgccctgcccagttcgctt gtgtccctgtccctgagccgcaccaacatcctggtgctggaccctgccaccctggcaggcctttatgccctgcgc ttcctgttcctggatggcaactgctactacaagaacccctgccagcaggccctgcaggtggccccaggtgccctc ctgggcctgggcaacctcacacacctgtcactcaagtacaacaacctcaccgtggtgccgcggggcctgcccccc agcctggagtacctgctc tgtcctacaaccacatcatcaccctggcacctgaggacctggccaatctgactgcc ctgcgtgtcctcgatgtgggtgggaactgtcgccgctgtgaccatgcccgtaacccctgcagggagtgccccaag ggcttcccccagctgcaccccaacaccttcggccacctgagccacctcgaaggcctggtgttgagggacagctct ctctacagcctggaccccaggtggttccatggcctgggcaacctcatggtgctggacctgagtgagaacttcctg tatgactgcatcaccaaaaccaaagccttctacggcctggcccggctgcgcagactcaacctgtccttcaattat cataagaaggtgtcctttgcccacctgcatctggcatcctccttcgggagcctactgtccctgcaggagctggac atacatggcatcttcttccgctcgctcagcaagaccacgctccagtcgctggcccacctgcccatgctccagcgt ctgcatctgcagttgaactttatcagccaggcccagctcagcatcttcggcgccttccctggactgcggtacgtg gacttgtcagacaaccgcatcagtggagctgcagagcccgcggctgccacaggggaggtagaggcagactgtggg gagagagtctggccacagtcccgggaccttgctctgggcccactgggcacccccggctcagaggccttcatgccg agctgcaggaccctcaacttcaccttggacctgtctcggaacaacctagtgactgttcagccggagatgtttgtc cggctggcgcgcctccagtgcctgggcctgagccacaacagcatctcgcaggcggtcaatggctcgcagttcgtg cctctgagcaacctgcgggtgctggacctgtcccataacaagctggacctgtaccacgggcgctcgttcacggag ctgccgcggctggaggccttggacctcagctacaacagccagcccttcagcatgcggggcgtgggccacaatctc agctttgtggcacagctgccagccctgcgctacctcagcctggcgcacaatggcatccacagccgcgtgtcccag cagctccgcagcgcctcgctccgggccctggacttcagtggcaataccctgagccagatgtgggccgagggagac ctctatctccgcttcttccaaggcctgagaagcctggttcagctggacctgtcccagaatcgcctgcataccctc ctgccacgcaacctggacaacctccccaagagcctgcggctcctgcggctccgtgacaattacctggctttcttc aactggagcagcctggccctcctacccaagctggaagccctggacctggcgggaaaccagctgaaggccctgagc aatggcagcttgcccaacggcacccagctccagaggctggacctcagcggcaacagcatcggcttcgtggtcccc agcttttttgccctggccgtgaggcttcgagagctcaacctcagcgccaacgccctcaagacggtggagccctcc tggtttggttccctggcgggtgccctgaaagtcctagacgtgaccgccaaccccttgcattgcgcttgcggcgca accttcgtggacttcttgctggaggtgcaggctgcggtgcccggcctgcctagccgtgtcaagtgcggcagcccg ggccagctccagggccgcagcatcttcgcacaggacctgcgcctctgcctggacgaagcgctctcctgggtctgt ttcagcctctcgctgctggctgtggccctgagcctggctgtgcccatgctgcaccagctctgtggctgggacctc tggtactgcttccacctgtgcctggcctggctgccccggcgggggcggcggcggggtgtggatgccctggcctat gacgccttcgtggtcttcgacaaggcgcagagctcggtggcggactgggtgtacaatgagctgcgggtacagcta gaggagcgccgtgggcgccgggcgctacgcctgtgtctggaggaacgtgactgggtacccggcaaaaccctcttc gagaacctctgggcctcagtttacagcagccgcaagacgctgtttgtgctggcccgcacggacagagtcagcggc ctcctgcgtgccagcttcctgctggcccaacagcgcctgctggaggaccgcaaggacgtcgtggtgctggtgatc ctgtgccccgacgcccaccgctcccgctatgtgcggctgcgccagcgcctctgccgccagagtgtcctcctctgg ccccaccagcccagtggccagcgcagcttctgggcccagctgggcacggccctgaccagggacaaccgccacttc tacaaccagaacttctgccggggccccacgacagcctgataggcagacagcccagcaccttcgcgcccctacacc ctgcctgtctgtctgggatgcccgacctgctggctctacaccgccgctctgtctcccctacacccagccctggca taaagcgaccgctcaataaatgctgctggtagac

SEQ ID NO:24 (Canine TLR9) atgggcccctgccgtggcgccctgcaccccctgtctctcctggtgcaggctgccgcgctagccctggccctggcc cagggcaccctgcctgccttcctgccctgtgagctccagccccatggcctggtgaactgcaactggctgttcctc aagtccgtgccccgcttctcggcagctgcaccccgcggtaacgtcaccagcctttccttgtactccaaccgcatc caccacctccatgactatgactttgtccacttcgtccacctgcggcgtctcaatctcaagtggaactgcccgccc gccagcctcagccccatgcactttccctgtcacatgaccattgagcccaacaccttcctggctgtgcccacccta gaggacctgaatctgagctataacagcatcacgactgtgcccgccctgcccagttcgcttgtgtccctgtccctg agccgcaccaacatcctggtgctggaccctgccaccctggcaggcctttatgccctgcgcttcctgttcctggat ggcaactgctactacaagaacccctgccagcaggccctgcaggtggccccaggtgccctcctgggcctgggcaac ctcacacacctgtcactcaagtacaacaacctcaccgtggtgccgcggggcctgccccccagcctggagtacctg ctcttgtcctacaaccacatcatcaccctggcacctgaggacctggccaatctgactgccctgcgtgtcctcgat gtgggtgggaactgtcgccgctgtgaccatgcccgtaacccctgcagggagtgccccaagggcttcccccagctg caccccaacaccttcggccacctgagccacctcgaaggcctggtgttgagggacagctctctctacagcctggac cccaggtggttccatggcctgggcaacctcatggtgctggacctgagtgagaacttcctgtatgactgcatcacc aaaaccaaagccttctacggcctggcccggctgcgcagactcaacctgtccttcaatta cataagaaggtgtcc tttgcccacctgcatctggcatcctccttcgggagcctactgtccctgcaggagctggacatacatggcatcttc ttccgctcgctcagcaagaccacgctccagtcgctggcccacctgcccatgctccagcgtctgcatctgcagttg aactttatcagccaggcccagctcagcatcttcggcgccttccctggactgcggtacgtggacttgtcagacaac cgcatcagtggagctgcagagcccgcggctgccacaggggaggtagaggcagactgtggggagagagtctggcca cagtcccgggaccttgctctgggcccactgggcacccccggctcagaggccttcatgccgagctgcaggaccctc aacttcaccttggacctgtctcggaacaacctagtgactgttcagccggagatgtttgtccggctggcgcgcctc cagtgcctgggcctgagccacaacagcatctcgcaggcggtcaatggctcgcagttcgtgcctctgagcaacctg cgggtgctggacctgtcccataacaagctggacctgtaccacgggcgctcgttcacggagctgccgcggctggag gccttggacctcagctacaacagccagcccttcagcatgcggggcgtgggccacaatctcagctttgtggcacag ctgccagccctgcgctacctcagcctggcgcacaatggcatccacagccgcgtgtcccagcagctccgcagcgcc tcgctccgggccctggacttcagtggcaataccctgagccagatgtgggccgagggagacctctatctccgcttc ttccaaggcctgagaagcctggttcagctggacctgtcccagaatcgcctgcataccctcctgccacgcaacctg gacaacctccccaagagcctgcggctcctgcggctccgtgacaattacctggctttcttcaactggagcagcctg gccctcctacccaagctggaagccctggacctggcgggaaaccagctgaaggccctgagcaatggcagcttgccc aacggcacccagctccagaggctggacctcagcggcaacagcatcggcttcgtggtccccagcttttttgccctg gccgtgaggcttcgagagctcaacctcagcgccaacgccctcaagacggtggagccctcctggtttggttccctg gcgggtgccctgaaagtcctagacgtgaccgccaaccccttgcattgcgcttgcggcgcaaccttcgtggacttc ttgctggaggtgcaggctgcggtgcccggcctgcctagccgtgtcaagtgcggcagcccgggccagctccagggc cgcagcatcttcgcacaggacctgcgcctctgcctggacgaagcgctctcctgggtctgtttcagc

SEQ ED NO:25 (Feline TLR9)

MGPCHGA HP SL VQAAALAVALAQGTLPAF PCELQRHG VWCD FLKSVPHFSAAAPRGNVTSLSLYSNRI HHLHDSDFVΗ SSLRRLNL NCPPAS SPMHFPCHMTIEPHTF AVPTLEELN SY SITTVPALPSSLVSLSL SRTNILVLDPA_.LAG HS RFLF DGNCYYK PCPQALQVAPGALLGLGNLTHLS KYNN TAVPRGLPPSLEYL SYNHIITLAPEDLAN TALRV DVGGNCRRCDIIARNPCMECPKGFPHLHPDTFSHL H EG VL DSSLYNLN PRWFHALGNLMVLDLSENF YDCITKTTAFQG AQLRR NLSFNYHKKVSFAHLH APSFGSLLSLQQLDMHGIF FRSLSETT RSLVHLPMLQSLH QMWFINQAQ SIFGAFPGLRYVDLSDNRISGAMELAAATGΞVDGGΞRVRLPS GD A GPPGTPSSEGFMPGCKTLNFTLDLSROTS VTIQPE FAR SRLQCLLLSRNSISQAVNGSQFMPLTS QV LD SHNKLDLYHGRSFTELPRLEALDLSYNSQPFSMQGVGHWLSFVAQLPALRYLSLAHNDIHSRVSQQ CSASL RALDFSGNA SRMWAEGDLY HFFRGLRS VRLDLSQNRLHTLLPRTLDNLPKSLR LR RDNY AFFN SSLVL LPRLEALDLAGNQ KALSNGSLPNGTQLQRLDLSSNSISFVASSFFALATRLRELN SA A KTVEPS FGS AG T KVLDVTGNP HCACGAAFVDFLLEVQAAVPGLPGHVKCGSPGQLQGRSIFAQDLRLC DEALSWDCFG S LT VALG AVP Iffi CG D YCFHLCLA LPRRGRRRGADALPYDAFVVFDKAQSAVAD VYNELRVRLEERRGRR A R CLEERD LPGKTLFΞNL ASVYSSRKM FVLAHTDRVSGLLRASFL AQQR LEDRKDλATV VILRPDAHR SRYVRLRQR CRQSVL PHQPSGQRSF AQLGTALTRDNQHFYWQNFCRGPTTAE

SEQ DD NO:26 (Feline TLR9) MGPCHGALHP SLLVQAAALAVALAQGTLPAF PCΞ QRHGLVNCDWLFLKSVPHFSAAAPRGNVTSLSLYSNRI HHLHDSDFVHLSSLRRLN K NCPPASLSPMHFPCHMTIΞPHTFLAVPTLEE NLSYNSITTVPA PSSLVSLSL SRTNI VLDPA_.LAG HSLRFLFLDGNCYYK_TPCPQALQVAPGALLGLGNLTHLSLKYN1.LTAVPRGLPPSLEYL LSYNHIITLAPEDLAMLTALRVLDVGGNCRRCDHARNPCMECPKGFPHLHPDTFSHLNH EG VLKDSSLYNLN PR FHA GNLMVLD SENF YDCITKTTAFQGLAQ RRLNLSFNYHKKVSFAHLHLAPSFGSLLSLQQLDMHGIF FRSLSETT RS VHLPMLQSLHLQMNFINQAQLSIFGAFPG RYVD SDNRISGAMELAAATGΞVDGGERVR PS GD ALGPPGTPSSEGFMPGCKTLNFTLD ΞR _T VTIQPEMFARIJSR QCL SRNSISQAAΠ_"GSQFMPLTSLQV LDLSHNKLDLYHGRSFTE PRLEA D SYNSQPFSMQGVGHNLSFVAQLPALRY SLAHNDIHSRVSQQ CSAS RA DFSGNALSRM AΞGDLYLHFFRGLRSLVRLDLSQNRLHTLLPRTLDN PKS RLLR RDNY AFFN SSLV PRLEALDLAGNQ KALSNGSLPNGTQLQRLDLSSNSISFVASSFFALATRLRΞLN SANALKTVEPS FGSLAG T KV DVTGNP HCACGAAFVDFLLEVQAAVPGLPGHVKCGSPGQLQGRSIFAQDLR CLDΞA SWDCFG

SEQ DD NO:27 (Feline TLR9) agggtctgcgagctccaggcattct c ctgccatcgctgcccagtctgccatccagaccctctggagaagcccc cactccctgtcatgggcccctgccatggcgccctgcaccccctgtctctcctggtgcaggctgccgcgctggccg tggccctggcccagggcaccctgcctgcctttctgccctgtgagctccagcgccacggcctggtgaattgcgact ggctgttcctcaagtccgtgccccacttctcggcggcagcgccccgtggtaacgtcaccagcctttccctgtact ccaaccgcatccaccacctccacgactccgactttgtccacctgtccagcctgcggcgtctcaacctcaaatgga actgcccacccgccagcctcagccccatgcacttcccctgtcacatgaccattgagccccacaccttcctggccg tgcccaccctggaggagctgaacctgagctacaacagcatcacgacagtacccgccctgcccagttccctcgtgt ccctgtccttgagccgtaccaacatcctggtgctggaccctgccaacctcgcagggctgcactccctgcgctttc tgttcctggatggcaactgctactacaagaacccctgcccgcaggccctgcaggtggccccgggcgccctccttg gcctgggcaaccttacgcacctgtcactcaagtacaacaacctcactgcggtgccccgcggcctgccccccagcc tggagtacctgctattgtcctacaaccacatcatcaccctggcacctgaggacctggccaacctgaccgccctgc gtgtgctcgatgtgggtgggaactgccgtcgctgtgaccacgcccgcaacccctgtatggagtgccccaagggct tcccgcacctgcaccctgacaccttcagccacctgaaccacctcgaaggcctggtgttgaaggacagctctctct acaacctgaaccccagatggttccatgccctgggcaacctcatggtgctggacctgagtgagaacttcctatatg actgcatcaccaaaaccacagccttccagggcctggcccagctgcgcagactcaacttgtctttcaattaccaca agaaggtgtcctttgcccacctgcatctggcgccctccttcgggagcctgctctccctgcagcagctggacatgc atggcatcttcttccgctcgctcagcgagaccacgctccggtcgctggtccacctgcccatgctccagagtctgc acctgcagatgaacttcatcaatcaggcccagctcagcatcttcggggccttccctggcctgcgatacgtggacc tgtcagacaaccgcataagtggagccatggagctggcggctgccacgggggaggtggatggtggggagagagtcc ggctgccatctggggacctagctctgggcccaccgggcacccctagctccgagggcttcatgccaggctgcaaga ccctcaacttcaccttggacctgtcacggaacaacctagtgacaatccagccagagatgtttgcccggctctcgc gcctccagtgcctgctcctgagccgcaacagcatctcgcaggcagtcaacggctcacaatttatgccgctgacca gcctgcaggtgctggacctgtcccataacaagctggacctgtaccatgggcgctctttcacggagctgccgcggc tggaggccctggacctcagctacaacagccagcccttcagcatgcagggcgtgggtcacaacctcagctttgtgg cacagctgccggccctgcgctatctcagcctggcgcacaacgacatccacagccgtgtgtcccagcagctctgca gcgcctcgctgcgggccttggacttcagcggcaatgccttgagccggatgtgggccgagggagacctgtatctcc acttcttccgaggcctgaggagcctggtccggttggatctgtcccagaatcgcctgcataccctcttgccacgca ccctggacaacctccccaagagcctgcggctgctgcgtctccgtgacaattatctggctttcttcaactggagca gcctggtcctcctccccaggctggaagccctggacctggcgggaaaccagctgaaggccctgagcaacggcagct tgcctaatggaacccagctccagaggctggacctcagcagcaacagtatcagcttcgtggcctccagcttttttg ctctggccaccaggctgcgagagctcaacctcagtgccaacgccctcaagacggtggagccctcctggttcggtt ctctagcgggcaccctgaaagtcctagatgtgactggcaaccccctgcactgcgcctgtggggcggccttcgtgg acttcttgctggaggtgcaggctgcagtgcccggcctgccaggccacgtcaagtgtggcagtccaggtcagctcc agggccgcagcatctttgcgcaggatctgcgcctctgcctggatgaggccctctcctgggactgttttggcctct cgctgctgaccgtggccctgggcctggccgtgcccatgctgcaccacctctgtggctgggacctctggtactgct tccacctgtgcctggcctggctgccccggcgggggcggcggcggggcgcggatgccctgccctacgatgcctttg tggtcttcgacaaggcacagagcgcggtggccgactgggtgtacaacgagctgcgggtacggctagaggagcgcc gtggacgccgagcgctccgcctgtgcctggaggaacgtgactggctacccggtaaaacgctctttgagaacctgt gggcctcagtttacagcagccgcaagatgctgtttgtgctggcccacacagacagggtcagcggcctcttgcgcg ccagctttctgctggcccagcagcgcctgctggaggaccgcaaggacgttgtggtgctggtgatcctgcgccccg acgcccaccgctcccgctatgtgcggctgcgccagcgcctctgccgccagagcgtcctcctctggccccaccagc ccagtggccagcgcagcttctgggcccagctgggcacggccctgaccagggacaaccagcacttctataaccaga acttctgccggggccccacgacggcagagtgaccgcccagcaccccaagcctcctacaccttgcctgtctgcctg ggatgccggg

SEQ ED NO:28 (Feline TLR9) atgggcccctgccatggcgccctgcaccccctgtctctcctggtgcaggctgccgcgctggccgtggccctggcc cagggcaccctgcctgcctttctgccctgtgagctccagcgccacggcctggtgaattgcgactggctgttcctc aagtccgtgccccacttctcggcggcagcgccccgtggtaacgtcaccagcctttccctgtactccaaccgcatc caccacctccacgactccgactttgtccacctgtccagcctgcggcgtctcaacctcaaatggaactgcccaccc gccagcctcagccccatgcacttcccctgtcacatgaccattgagccccacaccttcctggccgtgcccaccctg gaggagctgaacctgagctacaacagcatcacgacagtacccgccctgcccagttccctcgtgtccctgtccttg agccgtaccaacatcctggtgctggaccctgccaacctcgcagggctgcactccctgcgctttctgttcctggat ggcaactgctactacaagaacccctgcccgcaggccctgcaggtggccccgggcgccctccttggcctgggcaac cttacgcacctgtcactcaagtacaacaacctcactgcggtgccccgcggcctgccccccagcctggagtacctg ctattgtcctacaaccacatcatcaccctggcacctgaggacctggccaacctgaccgccctgcgtgtgctcgat gtgggtgggaactgccgtcgctgtgaccacgcccgcaacccctgtatggagtgccccaagggcttcccgcacctg caccctgacaccttcagccacctgaaccacctcgaaggcctggtgttgaaggacagctctctctacaacctgaac cccagatggttccatgccctgggcaacctcatggtgctggacctgagtgagaact cctatatgactgcatcacc aaaaccacagccttccagggcctggcccagctgcgcagactcaacttgtctttcaattaccacaagaaggtgtcc tttgcccacctgcatctggcgccctccttcgggagcctgctctccctgcagcagctggacatgcatggcatcttc ttccgctcgctcagcgagaccacgctccggtcgctggtccacctgcccatgctccagagtctgcacctgcagatg aacttcatcaatcaggcccagctcagcatcttcggggccttccctggcctgcgatacgtggacctgtcagacaac cgcataagtggagccatggagctggcggctgccacgggggaggtggatggtggggagagagtccggctgccatct ggggacctagctctgggcccaccgggcacccctagctccgagggcttcatgccaggctgcaagaccctcaacttc accttggacctgtcacggaacaacctagtgacaatccagccagagatgtttgcccggctctcgcgcctccagtgc ctgctcctgagccgcaacagcatctcgcaggcagtcaacggctcacaatttatgccgctgaccagcctgcaggtg ctggacctgtcccataacaagctggacctgtaccatgggcgctctttcacggagctgccgcggctggaggccctg gacctcagctacaacagccagcccttcagcatgcagggcgtgggtcacaacctcagctttgtggcacagctgccg gccctgcgctatctcagcctggcgcacaacgacatccacagccgtgtgtcccagcagctctgcagcgcctcgctg cgggccttggacttcagcggcaatgccttgagccggatgtgggccgagggagacctgtatctccacttcttccga ggcctgaggagcctggtccggttggatctgtcccagaatcgcctgcataccctcttgccacgcaccctggacaac ctccccaagagcctgcggctgctgcgtctccgtgacaattatctggctttcttcaactggagcagcctggtcctc ctccccaggctggaagccctggacctggcgggaaaccagctgaaggccctgagcaacggcagcttgcctaatgga acccagctccagaggctggacctcagcagcaacagtatcagcttcgtggcctccagcttttttgctctggccacc aggctgcgagagctcaacctcagtgccaacgccctcaagacggtggagccctcctggttcggttctctagcgggc accctgaaagtcctagatgtgactggcaaccccctgcactgcgcctgtggggcggccttcgtggacttcttgctg gaggtgcaggctgcagtgcccggcctgccaggccacgtcaagtgtggcagtccaggtcagctccagggccgcagc atctttgcgcaggatctgcgcctctgcctggatgaggccctctcctgggactgttttggc

Complete nucleotide and amino acid sequences for murine and human TLR9 are publicly available. For example, an amino acid sequence ofmurine TLR9 is available as GenBank accession no. AAK29625, provided as SEQ DD NO:29. Amino acids numbered 1- 821 of SEQ DD NO:29 presumptively include the entire extracellular domain and correspond to SEQ ED NO:30. SEQ ID NO:31 corresponds to GenBank accession number AF348140, which is a nucleotide sequence of murine TLR9 cDNA. SEQ DD NO:32 is a nucleotide sequence of murine cDNA encoding amino acids 1-821 of SEQ DD NO:29.

An amino acid sequence of human TLR9 is available as GenBank accession no. AAF78037, provided as SEQ DD NO:33. Amino acids numbered 1-820 of SEQ DD NO:33 presumptively include the entire extracellular domain and correspond to SEQ DD NO:34. SEQ ED NO:35 corresponds to GenBank accession number AF245704, which is a nucleotide sequence of human TLR9 cDNA. SEQ ID NO:36 is a nucleotide sequence of human cDNA encoding amino acids 1-820 of SEQ ED NO:33.

SEQ DD NO:29 (Murine TLR9)

MV RRRTLHPLSLLVQAAVLAETLA GT PAF PCΞ KPHG VDCNWLFLKSVPRFSAAASCSNITRLSLISNRI HHL__MSDFVHLSN RQLN K NCPPTGLSPLHFSCHMTIEPRTF AMRT EELNIJSYNGITTVPRLPSSLV_TLS

SHTNILVLDANSLAGLYSLRVLFMDGNCYY_α_"PCTGAVKVTPGALLG SN THLS KYIffiLTKVPRQLPPSLEYL VSYWLIVK GPEDLA1.LTSLRVLDVGGNCRRCDHAPNPCIECGQKSLH HPETFHH SHLEGLVLKDSS HTLN

SSWFQG VN SVLDLSEMFLYESIWHTNAFQNLTRLRKLMLSFNYRK-VSFARLH ASSFKN VSLQELNMMGIF

FRSLNKYT R LADLPKLHT H QMNFINQAQ SIFGTFRA RFVD SDNRISGPST SEATPEEADDAEQΞELL SADPHPAPLSTPAS_αSTFMDRC_α_"FKFTMDLSR_Η_"LVTIKPEMFVNLSR QCLS S__ SIAQAVNGSQFLP TNLQ

VLDLSHNK DLYH KSFSE PQ QA D SYNSQPFSMKGIGH FSFVAH SM HSLS AHNDIHTRVSSHLMSNS λπ.FLDFSGNGMGRMWDΞGGLYLHFFQG SGL K D SQNN HILRPQN DNLPKS KLLSLRDNYLSFFN TSLS

FLPNLΞVLDLAGNQLKALTNGT PNGTLLQK DVSSNSIVSλA.PAFFALAVE KEVl.LSHNILKTVDRS FGPIV NLTVLDVRSNP HCACGAAFVϋLL EVQTKVPGLA_TGVKCGSPGQLQGRSIFAQDLR C DEV SWDCFGLS L AVAVGMWPILHHLCG DV YCFH CLA LPL ARSRRSAQALPYDAFλ/VFDKAQSAVAD VYME RVRLΞERRG

RRALRLCLEDRD LPGQT FEN ASIYGSRKTLFV AHTDRVSG LRTSFLLAQQRL EDRKDVW VILRPDA

HRSRYVRLRQRLCRQSV F PQQPNGQGGFWAQLSTA TRDNRHFYNQNFCRGPTAΞ

SEQ ED NO:30 (Murine TLR9) MVLRRRTLHPLS LVQAAVLAETLALGTLPAFLPCE KPHGLλΛDC WLF KSVPRFSAAASCSNITR SLISNRI HHLHNSDFVHLSNLRQLNLP NCPPTG SPLHFSCHMTIEPRTF AMRT EELN SYNGITTVPRLPSSLVNLS SHTNI V DANSLAGLYSLRVLFMDGNCYYKNPCTGAVKVTPGAL GLSNLTHLSLKYNWLTKVPRQLPPSLEYL LVSYNLIV LGPEDLAN TSLRVLDVGGNCRRCDHAPNPCIΞCGQKSLH HPETFHHLSHLEG V KDSSLHT N SS FQGLVNLSVLD SENF YESINHTNAFQNLTR RKLNLSFNYRKK7SFARLHLASSFK LVSLQELNMNGIF FRSLNKYT RWLADLPKLHTLHLQMNFINQAQLSIFGTFRA RFVDLSDNRISGPSTLSEATPEEADDAEQEELL SADPHPAPLSTPASKNFMDRCKMFKFTMDLSRlTO VTIKPEMFVNLSR QCLSLSHNSIAQAλ/NGSQFLPLTN Q V DLSII ΪΛDLYH KSFSELPQLQALD SYNSQPFSMKGIGHNFSFVAH SM HSLSLAHNDIHTRVSSH NSNS VRFLDFSGNGMGRMWDEGGLYLHFFQG SGL KLDLSQNNLHILRPQNLDN PKS LSLRDNY SFFN TSLS F PNLEV DLAGNQLKA TNGTLPNGT LQKLDVSSNSIVSWPAFFA AVELKEV LSHNI KTVDRS FGPIV MN TVLDVRSNPLHCACGAAFVDL EVQTKVPGLANGVKCGSPGQ QGRSIFAQDLRLC DEVLS DCFG

SEQ DD NO:31 (Murine TLR9) tgtcagagggagcctcgggagaatcctccatctcccaacatggttctccgtcgaaggactctgcaccccttgtcc ctcctggtacaggctgcagtgctggctgagactctggccctgggtaccctgcctgccttcctaccctgtgagctg aagcctcatggcctggtggactgcaattggctgttcctgaagtctgtaccccgtttctctgcggcagcatcctgc tccaacatcacccgcctctccttgatctccaaccgtatccaccacctgcacaactccgacttcgtccacctgtcc aacctgcggcagctgaacctcaagtggaactgtccacccactggccttagccccctgcacttctcttgccacatg accattgagcccagaaccttcctggctatgcgtacactggaggagctgaacctgagctataatggtatcaccact gtgccccgactgcccagctccctggtgaatctgagcctgagccacaccaacatcctggttctagatgctaacagc ctcgccggcc atacagcctgcgcgttctcttcatggacgggaactgctactacaagaacccctgcacaggagcg gtgaaggtgaccccaggcgccctcctgggcctgagcaatctcacccatctgtctctgaagtataacaacctcaca aaggtgccccgccaactgccccccagcctggagtacctcctggtgtcctataacctcattgtcaagctggggcct gaagacctggccaatctgacctcccttcgagtacttgatgtgggtgggaattgccgtcgctgcgaccatgccccc aatccctgtatagaatgtggccaaaagtccctccacctgcaccctgagaccttccatcacctgagccatctggaa ggcctggtgctgaaggacagctctctccatacactgaactcttcctggttccaaggtctggtcaacctctcggtg ctggacctaagcgagaacfcttctctatgaaagcatcaaccacaccaatgcctttcagaacctaacccgcctgcgc aagctcaacctgtccttcaattaccgcaagaaggtatcctttgcccgcctccacctggcaagttccttcaagaac ctggtgtcactgcaggagctgaacatgaacggcatcttcttccgctcgctcaacaagtacacgctcagatggctg gccgatctgcccaaactccacactctgcatcttcaaatgaacttcatcaaccaggcacagctcagcatctttggt accttccgagcccttcgctttgtggacttgtcagacaatcgcatcagtgggccttcaacgctgtcagaagccacc cctgaagaggcagatgatgcagagcaggaggagctgttgtctgcggatcctcacccagctccactgagcacccct gcttctaagaacttcatggacaggtgtaagaacttcaagttcaccatggacctgtctcggaacaacctggtgact atcaagccagagatgtttgtcaatctctcacgcctccagtgtcttagcctgagccacaactccattgcacaggct gtcaatggctctcagttcctgccgctgactaatctgcaggtgctggacctgtcccataacaaactggacttgtac cactggaaatcgttcagtgagctaccacagttgcaggccctggacctgagctacaacagccagccctttagcatg aagggtataggccacaatttcagttttgtggcccatctgtccatgctacacagccttagcctggcacacaatgac attcatacccgtgtgtcctcacatctcaacagcaactcagtgaggtttcttgacttcagcggcaacggtatgggc cgcatgtgggatgaggggggcctttatctccatttcttccaaggcctgagtggcctgctgaagctggacctgtct caaaataacctgcatatcctccggccccagaaccttgacaacctccccaagagcctgaagctgctgagcctccga gacaactacctatctttctttaactggaccagtctgtccttcctgcccaacctggaagtcctagacctggcaggc aaccagctaaaggccctgaccaatggcaccctgcctaatggcaccctcctccagaaactggatgtcagcagcaac agtatcgtctctgtggtcccagccttcttcgctctggcggtcgagctgaaagaggtcaacctcagccacaacatt ctcaagacggtggatcgctcctggtttgggcccattgtgatgaacctgacagttctagacgtgagaagcaaccct ctgcactgtgcctgtggggcagccttcgtagacttactgttggaggtgcagaccaaggtgcctggcctggctaat ggtgtgaagtgtggcagccccggccagctgcagggccgtagcatcttcgcacaggacctgcggctgtgcctggat gaggtcctctcttgggactgctttggcctttcactcttggctgtggccgtgggcatggtggtgcctatactgcac catctctgcggctgggacgtctggtactgttttcatctgtgcctggcatggctacctttgctggcccgcagccga cgcagcgcccaagctctcccctatgatgccttcgtggtgttcgataaggcacagagcgcagttgcggactgggtg tataacgagctgcgggtgcggctggaggagcggcgcggtcgccgagccctacgcttgtgtctggaggaccgagat tggctgcctggccagacgctcttcgagaacctctgggcttccatctatgggagccgcaagactctatttgtgctg gcccacacggaccgcgtcagtggcctcctgcgcaccagcttcctgctggctcagcagcgcctgttggaagaccgc aaggacgtggtggtgttggtgatcctgcgtccggatgcccaccgctcccgctatgtgcgactgcgccagcgtctc tgccgccagagtgtgctcttctggccccagcagcccaacgggcaggggggcttctgggcccagctgagtacagcc ctgactagggacaaccgccacttctataaccagaacttctgccggggacctacagcagaatagctcagagcaaca gctggaaacagctgcatcttcatgcctggttcccgagttgctctgcctgc

SEQ DD NO:31 (Murine TLR9) atggttctccgtcgaaggactctgcaccccttgtccctcctggtacaggctgcagtgctggctgagactctggcc ctgggtaccctgcctgccttcctaccctgtgagctgaagcctcatggcctggtggactgcaattggctgttcctg aagtctgtaccccgtttctctgcggcagcatcctgctccaacatcacccgcctctccttgatctccaaccgtatc caccacctgcacaactccgacttcgtccacctgtccaacctgcggcagctgaacctcaagtggaactgtccaccc actggccttagccccctgcacttctcttgccacatgaccattgagcccagaaccttcctggctatgcgtacactg gaggagctgaacctgagctataatggtatcaccactgtgccccgactgcccagctccctggtgaatctgagcctg agccacaccaacatcctggttctagatgctaacagcctcgccggcctatacagcctgcgcgttctcttcatggac gggaactgctactacaagaacccctgcacaggagcggtgaaggtgaccccaggcgccctcctgggcctgagcaat ctcacccatctgtctctgaagtataacaacctcacaaaggtgccccgccaactgccccccagcctggagtacctc ctggtgtcctataacctca tgtcaagctggggcctgaagacctggccaatctgacctcccttcgagtacttgat gtgggtgggaattgccgtcgctgcgaccatgcccccaatccctgtatagaatgtggccaaaagtccctccacctg caccctgagaccttccatcacctgagccatctggaaggcctggtgctgaaggacagctctctccatacactgaac tcttcctggttccaaggtctggtcaacctctcggtgctggacctaagcgagaactttctctatgaaagcatcaac cacaccaatgcctttcagaacctaacccgcctgcgcaagctcaacctgtccttcaattaccgcaagaaggtatcc tttgcccgcctccacctggcaagttccttcaagaacctggtgtcactgcaggagctgaacatgaacggcatcttc ttccgctcgctcaacaagtacacgctcagatggctggccgatctgcccaaactccacactctgcatcttcaaatg aacttcatcaaccaggcacagctcagcatctttggtaccttccgagcccttcgctttgtggacttgtcagacaat cgcatcagtgggccttcaacgctgtcagaagccacccctgaagaggcagatgatgcagagcaggaggagctgttg tctgcggatcctcacccagctccactgagcacccctgcttctaagaacttcatggacaggtgtaagaacttcaag ttcaccatggacctgtctcggaacaacctggtgactatcaagccagagatgtttgtcaatctctcacgcctccag tgtcttagcctgagccacaactccattgcacaggctgtcaatggctctcagttcctgccgctgactaatctgcag gtgctggacctgtcccataacaaactggacttgtaccactggaaatcgttcagtgagctaccacagttgcaggcc ctggacctgagctacaacagccagccctttagcatgaagggtataggccacaatttcagttttgtggcccatctg tccatgctacacagccttagcctggcacacaatgacattcatacccgtgtgtcctcacatctcaacagcaactca gtgaggtttcttgacttcagcggcaacggtatgggccgcatgtgggatgaggggggcctttatctccatttcttc caaggcctgagtggcctgctgaagctggacctgtctcaaaataacctgcatatcctccggccccagaaccttgac aacctccccaagagcctgaagctgctgagcctccgagacaactacctatctttctttaactggaccagtctgtcc ttcctgcccaacctggaagtcctagacctggcaggcaaccagctaaaggccctgaccaatggcaccctgcctaat ggcaccctcctccagaaactggatgtcagcagcaacagtatcgtctctgtggtcccagccttcttcgctctggcg gtcgagctgaaagaggtcaacctcagccacaacattctcaagacggtggatcgctcctggtttgggcccattgtg atgaacctgacagttctagacgtgagaagcaaccctctgcactgtgcctgtggggcagccttcgtagacttactg ttggaggtgcagaccaaggtgcctggcctggctaatggtgtgaagtgtggcagccccggccagctgcagggccgt agcatcttcgcacaggacctgcggctgtgcctggatgaggtcctctcttgggactgctttggc

SEQ ED NO:33 (Human TLR9)

MGFCRSA HPLSLLVQAIMLAMTLALGT PAFLPCE QPHGLVNCN LFLKSVPHFSMAAPRGNVTS SLSSNRI HH HDSDFAHLPS RH NLKWNCPPVGI-SPMHFPCHMTIEPSTFLAVPTLΞELNLSYMsriMTVPA PKSLISLSL SHTNILMLDSAS AGL_ LRF FMDGNCYY__MPCRQALEVAPGALLG GN THLSLKY_ΩsrLTVVPRN PSSLΞYL LLSYNRIVK APΞDLA LTALRVLDVGGNCRRCDHAPNPCMECPRHFPQ HPDTFSHLSR EGLV KDSS S LM AS FRGLGNLRVLD SΞNFLYKCITKTKAFQG TQ RKIiMLSFNYQKRVSFAHLS APSFGSLVAL ELDMHGIF FRS DETTLRPLARLPMLQTLR QMNFINQAQ GIFRAFPGLRYVDLSDNRISGASE TATMGEADGGEKVWLQP GDLAPAPVDTPSSEDFRPNCSTLNFT DLSR NLVTVQPEMFAQLSHLQCLRLSHNCISQAλNGSQFLPLTG QV D SRNKLDLYHΞHSFTELPRLEALDLSYNSQPFGMQGVGH FSFVAH RTLRHLSLAHN_.IHSQVSQQ CSTSL RALDFSGNA GHM AEGDLYLHFFQGLSGLI LDLSQNRLHTLLPQTLRNLPKSLQVLRLRDNY AFFKWWS HF LPK EVLDLAGNRL ALTNGS PAGTRLRRLDVSCNSISFVAPGFFSKAKE RE NLSANAL TVDHS FGPLAS A QILDVSANP HCACGAAF DF EVQAAVPGLPSRVKCGSPGQ QG SIFAQD RLCLDEALSWDCFA SL A VA GLGVPMLHH CG D YCFHLC AW PWRGRQSGRDEDALPYDAFVVFDKTQSAVAD 'VYNE RGQ EECRG R A RLCLEERDWLPGKTLFENL ASVYGSRKTLFVLAHTDRVSG LRASFLLAQQR LEDRKDWVLVILSPDG RRSRYVRLRQRLCRQSVLL PHQPSGQRSF AQ GMA TRDNHHFYNRNFCQGPTAE

SEQ ED NO:34 (Human TLR9)

MGFCRSALHPLS VQAIMLAMTLALGTLPAFLPCELQPHGLVNCN LFLKSVPHFSMAAPRG VTSLS SSNRI HH HDSDFAHLPSLRH NLK NCPPVGLSPMHFPCHMTIEPSTFLAVPTLΞELNLSYKΓNIMTVPA PKSLIS SL SHTWI M DSASLAGLHA RFLFMDGNCYYKNPCRQALΞVAPGALLGLGNLTHLSLKYNN TVVPRNLPSSLEYL L SYNRIVK APEDLAN TA RVLDVGGNCRRCDHAPNPCMECPRHFPQLHPDTFSHLSRLEGLVLKDSSLSWLN AS FRGLGNLRV DLSENFLYKCITKTKAFQGLTQLRK NLSFNYQKRVSFAHLSLAPSFGSLVALKELDMHGIF FRSLDETTLRPLARLPMLQTLRLQMNFINQAQLGIFRAFPGLRYVDLSDNRISGASE TAT GEADGGΞKVWLQP GDLAPAPVDTPSSEDFRPNCSTLNFT DLSRIRØLVTVQPEMFAQLSHLQCLRLSHNCISQAVNGSQFLPLTGLQV DLS_^_Α_DLYHEHSFTELPRLEA DLSYNSQPFGMQGVG__NFSFVAHLRT RH SLAHN_JIHSQVSQQLCSTSL RALDFSGNALGHM AEGDLY HFFQGLSG I LDLSQNRLHTLLPQTLRNLPKS QV RLRDNYLAFFK SLHF LPKLEVLDLAGNRLKA TNGS PAGTR RR DVSCNSISFVAPGFFSKAKELRELNLSA1.ALKTVDHSWFGPLAS A QILDVSANPLHCACGAAFMDF LEVQAAVPGLPSRVKCGSPGQ QG SIFAQDLR CLDΞA S DCFA

SEQ DD NO:35 (Human TLR9) aggctggtataaaaatcttacttcctctattctctgagccgctgctgcccctgtgggaagggacctcgagtgtga agcatccttccctgtagctgctgtccagtctgcccgccagaccctctggagaagcccctgccccccagcatgggt ttctgccgcagcgccctgcacccgctgtctctcctggtgcaggccatcatgctggccatgaccctggccctgggt accttgcctgccttcctaccctgtgagctccagccccacggcctggtgaactgcaactggctgttcctgaagtct gtgccccacttctccatggcagcaccccgtggcaatgtcaccagcctttccttgtcctccaaccgcatccaccac ctccatgattctgactttgcccacctgcccagcctgcggcatctcaacctcaagtggaactgcccgccggttggc ctcagccccatgcacttcccctgccacatgaccatcgagcccagcaccttcttggctgtgcccaccctggaagag ctaaacctgagctacaacaacatcatgactgtgcctgcgctgcccaaatccctcatatccctgtccctcagccat accaacatcctgatgctagactctgccagcctcgccggcctgcatgccctgcgcttcctattcatggacggcaac tgttattacaagaacccctgcaggcaggcactggaggtggccccgggtgccctccttggcctgggcaacctcacc cacctgtcactcaagtacaacaacctcactgtggtgccccgcaacctgccttccagcctggagtatctgctgttg tcctacaaccgcatcgtcaaactggcgcctgaggacctggccaatctgaccgccctgcgtgtgctcgatgtgggc ggaaattgccgccgctgcgaccacgctcccaacccctgcatggagtgccctcgtcacttcccccagctacatccc gataccttcagccacctgagccgtcttgaaggcctggtgttgaaggacagttctctctcctggctgaatgccagt tggttccgtgggctgggaaacctccgagtgctggacctgagtgagaacttcctctacaaatgcatcactaaaacc aaggccttccagggcctaacacagctgcgcaagcttaacctgtccttcaattaccaaaagagggtgtcctttgcc cacctgtctctggccccttccttcgggagcctggtcgccctgaaggagctggacatgcacggcatcttcttccgc tcactcgatgagaccacgctccggccactggcccgcctgcccatgctccagactctgcgtctgcagatgaacttc atcaaccaggcccagctcggcatcttcagggccttccctggcctgcgctacgtggacctgtcggacaaccgcatc agcggagcttcggagctgacagccaccatgggggaggcagatggaggggagaaggtctggctgcagcctggggac cttgctccggccccagtggacactcccagctctgaagacttcaggcccaactgcagcaccctcaacttcaccttg gatctgtcacggaacaacctggtgaccgtgcagccggagatgtttgcccagctctcgcacctgcagtgcctgcgc ctgagccacaactgcatctcgcaggcagtcaatggctcccagttcctgccgctgaccggtctgcaggtgctagac ctgtcccgcaataagctggacctctaccacgagcactcattcacggagctaccgcgactggaggccctggacctc agctacaacagccagccctttggcatgcagggcgtgggccacaacttcagcttcgtggctcacctgcgcaccctg cgccacctcagcctggcccacaacaacatccacagccaagtgtcccagcagctctgcagtacgtcgctgcgggcc ctggacttcagcggcaatgcactgggccatatgtgggccgagggagacctctatctgcacttcttccaaggcctg agcggtttgatctggctggacttgtcccagaaccgcctgcacaccctcctgccccaaaccctgcgcaacctcccc aagagcctacaggtgctgcgtctccgtgacaattacctggccttctttaagtggtggagcctccacttcctgccc aaactggaagtcctcgacctggcaggaaaccggctgaaggccctgaccaatggcagcctgcctgctggcacccgg ctccggaggctggatgtcagctgcaacagca cagcttcgtggcccccggcttcttttccaaggccaaggagctg cgagagctcaaccttagcgccaacgccctcaagacagtggaccactcctggtttgggcccctggcgagtgccctg caaatactagatgtaagcgccaaccctctgcactgcgcctgtggggcggcctttatggacttcctgctggaggtg caggctgccgtgcccggtctgcccagccgggtgaagtgtggcagtccgggccagctccagggcctcagcatcttt gcacaggacctgcgcctctgcctggatgaggccctctcctgggactgtttcgccctctcgctgctggctgtggct ctgggcctgggtgtgcccatgctgcatcacctctgtggctgggacctctggtactgcttccacctgtgcctggcc tggcttccctggcgggggcggcaaagtgggcgagatgaggatgccctgccctacgatgccttcgtggtcttcgac aaaacgcagagcgcagtggcagactgggtgtacaacgagcttcgggggcagctggaggagtgccgtgggcgctgg gcactccgcctgtgcctggaggaacgcgactggctgcctggcaaaaccctctttgagaacctgtgggcctcggtc tatggcagccgcaagacgctgtttgtgctggcccacacggaccgggtcagtggtctcttgcgcgccagcttcctg ctggcccagcagcgcctgctggaggaccgcaaggacgtcgtggtgctggtgatcctgagccctgacggccgccgc tcccgctacgtgcggctgcgccagcgcctctgccgccagagtgtcctcctctggccccaccagcccagtggtcag cgcagcttctgggcccagctgggcatggccctgaccagggacaaccaccacttctataaccggaacttctgccag ggacccacggccgaatagccgtgagccggaatcctgcacggtgccacctccacactcacctcacctctgcctgcc tggtctgaccctcccctgctcgcctccctcaccccacacctgacacagagca

SEQ ED NO:36 (Human TLR9) atgggtttctgccgcagcgccctgcacccgctgtctctcctggtgcaggccatcatgctggccatgaccctggcc ctgggtaccttgcctgccttcctaccctgtgagctccagccccacggcctggtgaactgcaactggctgttcctg aagtctgtgccccacttctccatggcagcaccccgtggcaatgtcaccagcctttccttgtcctccaaccgcatc caccacctccatgattctgactttgcccacctgcccagcctgcggcatctcaacctcaagtggaactgcccgccg gttggcctcagccccatgcacttcccctgccacatgaccatcgagcccagcaccttcttggctgtgcccaccctg gaagagctaaacctgagctacaacaacatcatgactgtgcctgcgctgcccaaatccctcatatccctgtccctc agccataccaacatcctgatgctagactctgccagcctcgccggcctgcatgccctgcgcttcctattcatggac ggcaactgttattacaagaacccctgcaggcaggcactggaggtggccccgggtgccctccttggcctgggcaac ctcacccacctgtcactcaagtacaacaacctcactgtggtgccccgcaacctgccttccagcctggagtatctg ctgttgtcctacaaccgcatcgtcaaactggcgcctgaggacctggccaatctgaccgccctgcgtgtgctcgat gtgggcggaaattgccgccgctgcgaccacgctcccaacccctgcatggagtgccctcgtcacttcccccagcta catcccgataccttcagccacctgagccgtcttgaaggcctggtgttgaaggacagttctctctcctggctgaat gccagttggttccgtgggctgggaaacctccgagtgctggacctgagtgagaacttcctctacaaatgcatcact aaaaccaaggccttccagggcctaacacagctgcgcaagcttaacctgtccttcaattaccaaaagagggtgtcc tttgcccacctgtctctggccccttccttcgggagcctggtcgccctgaaggagctggacatgcacggcatcttc ttccgctcactcgatgagaccacgctccggccactggcccgcctgcccatgctccagactctgcgtctgcagatg aact catcaaccaggcccagctcggcatcttcagggccttccctggcctgcgctacgtggacctgtcggacaac cgcatcagcggagcttcggagctgacagccaccatgggggaggcagatggaggggagaaggtctggctgcagcct ggggaccttgctccggccccagtggacactcccagctctgaagacttcaggcccaactgcagcaccctcaacttc accttggatctgtcacggaacaacctggtgaccgtgcagccggagatgtttgcccagctctcgcacctgcagtgc ctgcgcctgagccacaactgcatctcgcaggcagtcaatggctcccagttcctgccgctgaccggtctgcaggtg ctagacctgtcccgcaataagctggacctctaccacgagcactcattcacggagctaccgcgactggaggccctg gacctcagctacaacagccagccctttggcatgcagggcgtgggccacaacttcagcttcgtggctcacctgcgc accctgcgccacctcagcctggcccacaacaacatccacagccaagtgtcccagcagctctgcagtacgtcgctg cgggccctggacttcagcggcaatgcactgggccatatgtgggccgagggagacctctatctgcacttcttccaa ggcctgagcggtttgatctggctggacttgtcccagaaccgcctgcacaccctcctgccccaaaccctgcgcaac ctccccaagagcctacaggtgctgcgtctccgtgacaattacctggccttctttaagtggtggagcctccacttc ctgcccaaactggaagtcctcgacctggcaggaaaccggctgaaggccctgaccaatggcagcctgcctgctggc acccggctccggaggctggatgtcagctgcaacagcatcagcttcgtggcccccggcttcttttccaaggccaag gagctgcgagagctcaaccttagcgccaacgccctcaagacagtggaccactcctggtttgggcccctggcgagt gccctgcaaatactagatgtaagcgccaaccctctgcactgcgcctgtggggcggcctttatggacttcctgctg gaggtgcaggctgccgtgcccggtctgcccagccgggtgaagtgtggcagtccgggccagctccagggcctcagc atctttgcacaggacctgcgcctctgcctggatgaggccctctcctgggactgtttcgcc

hi addition to the foregoing native rat, porcine, bovine, equine, and ovine TLR9 polypeptides and nucleic acid molecules encoding them, chimeric TLR9 polypeptides and nucleic acid molecules encoding them are provided by the invention. The chimeric polypeptides include at least one amino acid subsititution based on a comparison of conserved and non-conserved amino acids among at least two of rat, murine, porcine, bovine, equine, ovine, canine, feline, and human TLR9. The information contained in a multiple sequence alignment of these various TLR9 polypeptide sequences, provided for example in Figure 1, can be used to identify and select individual amino acid positions and even individual amino acids to substitute in designing a chimeric TLR9. The substitution or substitutions can be effected using methods known to those of ordinary skill in molecular biology. Nucleic acids encoding the native or chimeric polypeptides ofthe invention can be inserted into an expression vector and used to express TLR9 polypeptide.

A conservative amino acid substitution shall refer to a substitution of a first amino acid for a second amino acid, wherein side chains ofthe first amino acid and the second amino acid share similar features in terms of hydrophobicity, size, aromaticity, or tendency to alter conformation. For example, conservative amino acid substitutions generally may be made between members within each ofthe following groups: hydrophobic (A, I, L, M, V), neutral (C, S, T), acidic (D, E), basic (H, K, N, Q, R), and aromatic (F, W, Y). A non- conservative amino acid substitution refers to any other amino acid substitution. An expression vector for TLR9 will include at least a nucleotide sequence coding for a TLR9, or a fragment thereof coding for a functional TLR9 polypeptide, operably linked to a gene expression sequence which can direct the expression ofthe TLR9 nucleic acid within a eukaryotic or prokaryotic cell. A "gene expression sequence" is any regulatory nucleotide sequence, such as a promoter sequence or promoter-enhancer combination, which facilitates the efficient transcription and translation ofthe nucleic acid to which it is operably linked. With respect to TLR9 nucleic acid, the "gene expression sequence" is any regulatory nucleotide sequence, such as a promoter sequence or promoter-enhancer combination, which facilitates the efficient transcription and translation ofthe TLR9 nucleic acid to which it is operably linked. The gene expression sequence may, for example, be a mammalian or viral promoter, such as a constitutive or inducible promoter. Constitutive mammalian promoters include, but are not limited to, the promoters for the following genes: hypoxanthine phosphoribosyl transferase (HPRT), adenosine deaminase, pyruvate kinase, β-actin promoter, and other constitutive promoters. Exemplary viral promoters which function constitutively in eukaryotic cells include, for example, promoters from the simian virus (e.g., SN40), papillomavirus, adenovirus, human immunodeficiency virus (HIN), Rous sarcoma virus (RSN), cytomegalovirus (CMV), the long terminal repeats (LTR) of Moloney murine leukemia virus and other retro viruses, and the thymidine kinase (TK) promoter of herpes simplex virus. Other constitutive promoters are known to those of ordinary skill in the art. The promoters useful as gene expression sequences ofthe invention also include inducible promoters. Inducible promoters are expressed in the presence of an inducing agent. For example, the metallothionein (MT) promoter is induced to promote transcription and translation in the presence of certain metal ions. Other inducible promoters are known to those of ordinary skill in the art. In general, the gene expression sequence shall include, as necessary, 5' non- transcribing and 5' non-translating sequences involved with the initiation of transcription and translation, respectively, such as a TATA box, capping sequence, CAAT sequence, and the like. Especially, such 5' non-transcribing sequences will include a promoter region which includes a promoter sequence for transcriptional control ofthe operably joined nucleic acid coding sequence for a TLR9 polypeptide. The gene expression sequences optionally include enhancer sequences or upstream activator sequences as desired. Generally a nucleic acid coding sequence and a gene expression sequence are said to be "operably linked" when they are covalently linked in such a way as to place the transcription and/or translation ofthe nucleic acid coding sequence under the influence or control ofthe gene expression sequence. Thus the TLR9 nucleic acid coding sequence and the gene expression sequence are said to be "operably linked" when they are covalently linked in such a way as to place the transcription and/or translation ofthe TLR9 nucleic acid coding sequence under the influence or control ofthe gene expression sequence. If it is desired that the TLR9 sequence be translated into a functional protein, two DNA sequences are said to be operably linked if induction of a promoter in the 5' gene expression sequence results in the transcription ofthe TLR9 sequence and if the nature ofthe linkage between the two DNA sequences does not (1) result in the introduction of a frame-shift mutation, (2) interfere with the ability ofthe promoter region to direct the transcription ofthe TLR9 sequence, or (3) interfere with the ability ofthe corresponding RNA transcript to be translated into a protein. Thus, a gene expression sequence would be operably linked to a TLR9 nucleic acid sequence if the gene expression sequence were capable of effecting transcription of that TLR9 nucleic acid sequence such that the resulting transcript might be translated into the desired TLR9 protein or polypeptide.

A "TLR9 ligand" as used herein refers to a molecule that specifically binds a TLR9 polypeptide. In one embodiment the TLR9 ligand specifically binds a TLR9 polypeptide corresponding to at least a ligand-binding portion ofthe extracellular domain of TLR9. In most instances a TLR9 ligand will also induce TLR9 signaling when contacted with TLR9 under suitable conditions. TLR9 signaling refers to TLR/IL-IR signal transduction mediated through the TLR9, as described in further detail elsewhere herein. As mentioned above, CpG nucleic acids have been reported to be TLR9 ligands, but TLR9 ligands may include other entities as well, including, for example, small molecules. As also previously mentioned, there appears to be a species-specific preference for at least certain TLR9s and certain CpG motifs. As used herein, a species-preferred CpG DNA refers to a particular CpG DNA that is optimized for signal induction by a TLR9 of a particular species. A CpG DNA that is optimized for signal induction by a TLR9 of a particular species refers to a CpG DNA having a sequence that preferentially binds to and/or induces signaling by TLR9 of that species. For example, a human-preferred CpG DNA shall refer to a CpG DNA that optimally stimulates human TLR9 to signal through its TIR domain. Likewise, a murine-preferred CpG DNA shall refer to a CpG DNA that optimally stimulates murine TLR9 to signal through its TER. domain. Examples of human-preferred and murine-preferred CpG DNA are ODN 2006 (SEQ DD NO:58) and 1668 (SEQ DD NO:60), respectively.

The binding and species specificity of TLR9s are believed to be influenced by key amino acids present in the extracellular domain of TLR9. Key amino acids in a TLR9 as used herein refer to those amino acids which contribute significantly to ligand binding and ligand specificity of a particular TLR9 polypeptide.

A "CpG nucleic acid" or a "CpG immunostimulatory nucleic acid" as used herein is a nucleic acid containing at least one unmethylated CpG dinucleotide (cytosine-guanine dinucleotide sequence, i.e., "CpG DNA" or DNA containing a 5' cytosine followed by 3' guanine and linked by a phosphate bond) which activates a component ofthe immune system. The entire CpG nucleic acid can be unmethylated or portions may be unmethylated but at least the C ofthe 5' CG 3' must be unmethylated.

In one embodiment a CpG nucleic acid is represented by at least the formula: 5'-NιXιCGX2N2-3' wherein Xi and X2 are nucleotides, N is any nucleotide, and Ni and N are nucleic acid sequences composed of from aboixt 0-25 N's each, hi some embodiments Xi is adenine, guanine, or thymine and/or X2 is cytosine, adenine, or thymine. In other embodiments Xi is cytosine and/or X2 is guanine. Nucleic acids having modified backbones, such as phosphorothioate backbones, also fall within the class of immunostimulatory nucleic acids. U.S. Pat. Nos. 5,723,335 and 5,663,153 issued to Hutcherson, et al. and related PCT publication WO95/26204 describe immune stimulation using phosphorothioate oligonucleotide analogues. These patents describe the ability ofthe phosphorothioate backbone to stimulate an immxme response in a non-sequence specific manner.

An immunostimulatory nucleic acid molecule, including for example a CpG DNA, may be double-stranded or single-stranded. Generally, double-stranded molecules may be more stable in vivo, while single-stranded molecules may have increased activity. The terms "nucleic acid" and "oligonucleotide" refer to multiple nucleotides (i.e., molecules comprising a sugar (e.g., ribose or deoxyribose) linked to a phosphate group and to an exchangeable organic base, which is either a substituted pyrimidine (e.g., cytosine (C), thymine (T) or uracil (U)) or a substituted purine (e.g., adenine (A) or guanine (G)) or a modified base. As used herein, the terms "nucleic acid" and "oligonucleotide" refer to oligoribonucleotides as well as oligodeoxyribonucleotides. The terms shall also include polynucleosides (i.e., a polynucleotide minus the phosphate) and any other organic base-containing polymer. The terms "nucleic acid" and "oligonucleotide" also encompass nucleic acids or oligonucleotides with a covalently modified base and/or sugar. For example, they include nucleic acids having backbone sugars which are covalently attached to low molecular weight organic groups other than a hydroxyl group at the 2' position and other than a phosphate group at the 5' position. Thus modified nucleic acids may include a 2'-O-alkylated ribose group. In addition, modified nucleic acids may include sugars such as arabinose instead of ribose. Thus the nucleic acids may be heterogeneous in backbone composition thereby containing any possible combination of polymer units linked together such as peptide-nucleic acids (which have amino acid backbone with nucleic acid bases). In some embodiments the nucleic acids are homogeneous in backbone composition.

The substituted purines and pyrimidines ofthe immunostimulatory nucleic acids include standard purines and pyrimidines such as cytosine as well as base analogs such as C- 5 propyne substituted bases. Wagner RW et al. (1996) Nat Biotechnol 14:840-4. Purines and pyrimidines include but are not limited to adenine, cytosine, guanine, thymine, 5- methylcytosine, 2-aminopurine, 2-amino-6-chloropurine, 2,6-diaminopurine, hypoxanthine, and other naturally and non-naturally occurring nucleobases, substituted and unsubstituted aromatic moieties.

The immunostimulatory nucleic acid is a linked polymer of bases or nucleotides. As used herein with respect to linked units of a nucleic acid, "linked" or "linkage" means two entities are bound to one another by any physicochemical means. Any linkage known to those of ordinary skill in the art, covalent or non-covalent, is embraced. Such linkages are well known to those of ordinary skill in the art. Natural linkages, which are those ordinarily found in nature connecting the individual units of a nucleic acid, are most common. The individual units of a nucleic acid maybe linked, however, by synthetic or modified linkages. Whenever a nucleic acid is represented by a sequence of letters it will be understood that the nucleotides are in 5' to 3' (or equivalent) order from left to right and that "A" denotes adenine, "C" denotes cytosine, "G" denotes guanine, "T" denotes thymidine, and "U" denotes uracil unless otherwise noted. Immunostimulatory nucleic acid molecules useful according to the invention can be obtained from natural nucleic acid sources (e.g., genomic nuclear or mitochondrial DNA or cDNA), or are synthetic (e.g., produced by oligonucleotide synthesis). Nucleic acids isolated from existing nucleic acid sources are referred to herein as native, natural, or isolated nucleic acids. The nucleic acids useful according to the invention may be isolated from any source, including eukaryotic sources, prokaryotic sources, nuclear DNA, mitochondrial DNA, etc. Thus, the term nucleic acid encompasses both synthetic and isolated nucleic acids.

The immunostimulatory nucleic acids can be prodxxced on a large scale in plasmids, (see Molecular Cloning: A Laboratory Manual, J. Sambrook, et al., eds., Second Edition, Cold Spring Harbor Laboratory Press, Cold Spring Harbor, New York, 1989) and separated into smaller pieces or administered whole. After being administered to a subject the plasmid can be degraded into oligonucleotides. One skilled in the art can purify viral, bacterial, eukaryotic, etc. nucleic acids using standard techniques, such as those employing restriction enzymes, exonucleases or endonucleases. For use in the instant invention, the immunostimulatory nucleic acids can be synthesized de novo using any of a number of procedures well known in the art. For example, the β-cyanoethyl phosphoramidite method (Beaucage SL and Caruthers MH, Tetrahedron Let 22:1859 (1981)); nucleoside H-phosphonate method (Garegg et al., Tetrahedron Let 27:4051-4054 (1986); Froehler et al., Nucl Acid Res 14:5399-5407 (1986); Garegg et al., Tetrahedron Let 27:4055-4058 (1986); Gaffhey et al, Tetrahedron Let 29:2619-2622 (1988)). These chemistries can be performed by a variety of automated oligonucleotide synthesizers available in the market.

The immimostimulatory nucleic acid may be any size of at least 6 nucleotides but in some embodiments are in the range of between 6 and 100 or in some embodiments between 8 and 35 nucleotides in size. Immunostimulatory nucleic acids can be produced on a large scale in plasmids. These may be administered in plasmid form or alternatively they can be degraded into oligonucleotides before administration.

A "stabilized immunostimulatory nucleic acid" shall mean a nucleic acid molecule that is relatively resistant to in vivo degradation (e.g., via an exo- or endo-nuclease). Stabilization can be a function of length or secondary structure. Nucleic acids that are tens to hundreds of kbs long are relatively resistant to in vivo degradation. For shorter nucleic acids, secondary structure can stabilize and increase their effect. For example, if the 3' end of an oligonucleotide has self-complementarity to an upstream region, so that it can fold back and form a sort of stem loop structure, then the oligonucleotide becomes stabilized and therefore exhibits more activity.

Some stabilized immunostimulatory nucleic acids have a modified backbone. It has been demonstrated that modification ofthe oligonucleotide backbone provides enhanced activity ofthe immunostimulatory nucleic acids when administered in vivo. Nucleic acids, including at least two phosphorothioate linkages at the 5' end ofthe oligonucleotide and multiple phosphorothioate linkages at the 3' end, preferably 5, may provide maximal activity and protect the oligonucleotide from degradation by intracellular exo- and endo-nucleases. Other modified oligonucleotides include phosphodiester modified oligonucleotide, combinations of phosphodiester and phosphorothioate oligonucleotide, methylphosphonate, methylphosphorothioate, phosphorodithioate, and combinations thereof. Each of these combinations and their particular effects on immune cells is discussed in more detail in U.S. Pat. Nos. 6,194,388 and 6,207,646, the entire contents of which are incorporated herein by reference. It is believed that these modified oligonucleotides may show more stimulatory activity due to enhanced nuclease resistance, increased cellular uptake, increased protein binding, and/or altered intracellular localization. Both phosphorothioate and phosphodiester nucleic acids are active in immune cells.

Other stabilized immunostimulatory nucleic acids include: nonionic DNA analogs, such as alkyl- and aryl-phosphates (in which the charged phosphonate oxygen is replaced by an alkyl or aryl group), phosphodiester and alkylphosphotriesters, in which the charged oxygen moiety is alkylated. Oligonucleotides which contain diol, such as tetraethyleneglycol or hexaethyleneglycol, at either or both termini have also been shown to be substantially resistant to nuclease degradation. Phosphorothioate nucleic acid molecules may be synthesized using automated techniques employing either phosphoramidate or H-phosphonate chemistries. Aryl- and alkyl-phosphonates can be made, e.g., as described in U.S. Pat. No. 4,469,863; and alkylphosphotriesters (in which the charged oxygen moiety is alkylated as described in U.S. Pat. No. 5,023,243 and European Patent No. 092,574) can be prepared by automated solid phase synthesis using commercially available reagents. Methods for making other DNA backbone modifications and substitutions have been described. Uhlmann E and Peyman A (1990) Chem Rev 90:544; Goodchild J (1990) Bioconjugate Chem 1:165. Other sources of immunostimulatory nucleic acids useful according to the invention include standard viral and bacterial vectors, many of which are commercially available. In its broadest sense, a "vector" is any nucleic acid material which is ordinarily used to deliver and facilitate the transfer of nucleic acids to cells. The vector as used herein may be an empty vector or a vector carrying a gene which can be expressed. In the case when the vector is carrying a gene the vector generally transports the gene to the target cells with reduced degradation relative to the extent of degradation that would result in the absence ofthe vector. In this case the vector optionally includes gene expression sequences to enhance expression ofthe gene in target cells such as immune cells, but it is not required that the gene be expressed in the cell.

Nucleic acid-binding fragments of TLRs are believed to include the extracytoplasmic (extracellular) domain or subportions thereof, such as those which include at least an MBD motif, a CXXC motif, or both an MBD motif and a CXXC motif.

Both mouse and human TLR9 have an N-terminal extension of approximately 180 amino acids compared to other TLRs. An insertion also occurs at amino acids 253-268, which is not found in TLRs 1-6 but is present in human TLR7 and human TLR8. This insert has two CXXC motifs which participate in forming a CXXC domain. The CXXC domain resembles a zinc finger motif and is found in DNA-binding proteins and in certain specific CpG binding proteins, e.g., methyl-CpG binding protein-1 (MBD-1). Fujita N et al. (2000) Mol Cell Biol 20:5107-18. Both human and mouse TLR9 CXXC domains occur at aa 253- 268:

CXXC motif: GNCXXCXXXXXXCXXC SEQ ED NO: 62

Human TLR9: GNCRRCDHAPNPCMEC SEQ DD NO:63 Murine TLR9: GNCRRCDHAPNPCMIC SEQ ID NO: 64

An additional motif believed to be involved in CpG binding is the MBD motif, also found in MBD-1, listed below as SEQ ED NO:53. Fujita, N et al.(2000) Mol Cell Biol 20:5107-18; Ohki I et al. (1999) EMBO J 18:6653-61. Amino acids 524-554 of hTLR9 and aa 525-555 of mTLR9 correspond to the MBD motif of MBD-1 as shown:

MBD motif: MBD-1 R-XXXXXXX-R-X-D-X-Y-XXXXXXXXX-R-S-XXXXXX-Y SEQ ID NO:65 hTLR9 Q-XXXXXXX-K-X-D-X-Y-XXXXXXXXX-R- -XXXXXX-Y SEQ DD NO:66 mTLR9 Q-xxxxxxx-κ-x-D-x-γ-xxxxxxxxx-Q- -xxxxxx-γ SEQ D NO:67

hTLR9 Q-V DLSRM-K-L-D- -Y-HEHSFTELP-R- -EALDLS-Y SEQ ED NO:68 mTLR9 Q-V DLSHN-K-L-D- -Y-HWKSFSE P-Q-L-QALD S-Y SEQ ED NO:69

Although the signaling functions of MBD-1 and TLR9 are quite different, the core D-X-Y is conserved and is believed to be involved in CpG binding. According to another aspect ofthe invention, a screening method is provided for identifying an immunostimulatory compound. The method according to this aspect ofthe invention involves contacting a functional TLR9 with a test compound; detecting presence or absence of a response mediated by a TLR9 signal transduction pathway in the presence ofthe test compound arising as a result of an interaction between the functional TLR9 and the test compound; and deteπnining the test compound is an immunostimulatory compound when the presence of a response mediated by the TLR9 signal transduction pathway is detected.

An immunostimulatory compound is a natural or synthetic compound that is capable of inducing an immune response when contacted with an immune cell. A TLR9 ligand that is an immunostimulatory compound is a natural or synthetic compound that is capable of inducing an immune response when contacted with an immtxne cell that expresses TLR9. A TLR9 ligand that is an immunostimulatory compound is also a natural or synthetic compound that is capable of inducing a TLR IL-IR signal transduction pathway when contacted with a TLR9. Immunostimulatory compounds include but are not limited to immunostimulatory nucleic acids. The immunostimulatory compound can be, for example, a nucleic acid molecule, polynucleotide or oligonucleotide, a polypeptide or oligopeptide, a lipid or lipopolysaccharide, a small molecule.

A basis for certain ofthe screening assays is the presence of a functional TLR9 in a cell. The functional TLR9 in some instances is naturally expressed by a cell. In other instances, expression ofthe functional TLR9 can involve introduction or reconstitution of a species-specific TLR9 into a cell or cell line that otherwise lacks the TLR9 or lacks responsiveness to immunostimulatory nucleic acid, resulting in a cell or cell line capable of activating the TLR/IL-IR signaling pathway in response to contact with an immunostimulatory nucleic acid. In yet other instances, expression ofthe functional TLR9 can involve introduction of a chimeric or modified TLR9 into a cell or cell line that otherwise lacks the TLR9 or lacks responsiveness to immxmostimulatory nucleic acid, resulting in a cell or cell line capable of activating the TLR/IL-IR signaling pathway in response to contact with an immunostimulatory nucleic acid. Examples of cell lines lacking TLR9 or immunostimulatory nucleic acid responsiveness include, but are not limited to, 293 fibroblasts (ATCC CRL-1573), MonoMac-6, THP-1, U937, CHO, and any TLR9 knock-out. The introduction ofthe species-specific, chimeric or modified TLR9 into the cell or cell line is preferably accomplished by transient or stable transfection ofthe cell or cell line with a TLR9-encoding nucleic acid sequence operatively linked to a gene expression sequence (as described above). Methods for transient and for stable transfection of a cell are well known in the art.

The screening assays can have any of a number of possible readout systems based upon either TLR/IL-IR signaling pathway or other assays useful for assessing response to immunostimulatory nucleic acids. It has been reported that immune cell activation by CpG immunostimulatory sequences is dependent in some way on endosomal processing.

In certain embodiments, the readout for the screening assay is based on the use of native genes or, alternatively, cotransfected or otherwise co-introduced reporter gene constructs which are responsive to the TLR/IL-IR signal transduction pathway involving MyD88, TRAP, p38, and/or ERK. Hacker H et al. (1999) EMBO J 18:6913-6982. These pathways activate kinases including KB kinase complex and c-Jun N-terminal kinases. Thus reporter genes and reporter gene constructs particularly useful for the assays can include a reporter gene operatively linked to a promoter sensitive to NF-κB. Examples of such promoters include, without limitation, those for NF-κB, IL-lβ, IL-6, IL-8, IL-12 p40, CD80, CD86, and TNF-α. The reporter gene operatively linked to the TLR-sensitive promoter can include, without limitation, an enzyme (e.g., luciferase, alkaline phosphatase, β-galactosidase, chloramphenicol acetyltransferase (CAT), etc.), a bioluminescence marker (e.g., green- fluorescent protein (GFP, U.S. Pat. No. 5,491,084), blue fluorescent protein, etc.), a surface- expressed molecule (e.g., CD25), and a secreted molecule (e.g., IL-8, IL-12 p40, TNF-α). In certain embodiments the reporter is selected from IL-8, TNF-α, NF-κB-luciferase (NF-κB- luc; Hacker H et al. (1999) EMBO J ' 18:6973-6982), IL-12 p40-luc (Murphy TL et al. (1995) Mol Cell Biol 15:5258-5267), and TNF-luc (Hacker H et al. (1999) EMBO J 18:6973-6982). At least one of these reporter constructs (NF-κB-luc) is commercially available (Stratagene, La Jolla, CA). In assays relying on enzyme activity readout, substrate can be supplied as part ofthe assay, and detection can involve measurement of chemiluminescence, fluorescence, color development, incorporation of radioactive label, drug resistance, or other marker of enzyme activity. For assays relying on surface expression of a molecule, detection can be accomplished using FACS analysis or functional assays. Secreted molecules can be assayed using enzyme-linked immunosorbent assay (ELISA) or bioassays. Many such readout systems are well known in the art and are commercially available. According to one embodiment of this method, comparison can be made to a reference immunostimulatory nucleic acid. The reference immunostimulatory nucleic acid may be any suitably selected immunostimulatory nucleic acid, including a CpG nucleic acid. In certain embodiments the screening method is performed using a plurality of test nucleic acids. In certain embodiments comparison of test and reference responses is based on comparison of quantitative measurements of responses in each instance.

In another aspect the invention provides a screening method for identifying species specificity of an immunostimulatory nucleic acid. The method involves contacting a TLR9 of a first species with a test immunostimulatory nucleic acid; contacting a TLR9 of a second species with the test immunostimulatory nucleic acid; measuring a response mediated by a TLR signal transduction pathway associated with the contacting the TLR9 ofthe first species with the test immunostimulatory nucleic acid; measuring a response mediated by the TLR signal transduction pathway associated with the contacting the TLR9 ofthe second species with the test immunostimulatory nucleic acid; and comparing the two responses. The TLR9 may be expressed by a cell or it may be part of a cell-free system. The TLR9 may be part of a complex, with either another TLR or with another protein, e.g., MyD88, IRAK, TRAF, IκB, NF-κB, or functional homologues and derivatives thereof. Thus for example a given ODN can be tested against a panel of human fibroblast 293 fibroblast cells transfected with TLR9 from various species and optionally cotransfected with a reporter construct sensitive to TLR/IL-IR activation pathways. Thus in another aspect, the invention provides a method for screening species selectivity with respect to a given nucleic acid sequence.

Test compounds can include but are not limited to peptide nucleic acids (PNAs), antibodies, polypeptides, carbohydrates, lipids, hormones, and small molecules. Test compounds can further include variants of a reference immunostimulatory nucleic acid incorporating any one or combination ofthe substitutions described above. Test compoxmds can be generated as members of a combinatorial library of compounds.

In preferred embodiments, the screening methods can be performed on a large scale and with high throughput by incorporating, e.g., an array-based assay system and at least one automated or semi-automated step. For example, the assays can be set up using multiple- well plates in which cells are dispensed in individual wells and reagents are added in a systematic manner using a multiwell delivery device suited to the geometry ofthe multi well plate. Manual and robotic multiwell delivery devices suitable for use in a high throughput screening assay are well known by those skilled in the art. Each well or array element can be mapped in a one-to-one manner to a particular test condition, such as the test compound. Readouts can also be performed in this multiwell array, preferably using a multiwell plate reader device or the like. Examples of such devices are well known in the art and are available through commercial sources. Sample and reagent handling can be automated to further enhance the throughput capacity ofthe screening assay, such that dozens, hundreds, thousands, or even millions of parallel assays can be performed in a day or in a week. Fully robotic systems are known in the art for applications such as generation and analysis of combinatorial libraries of synthetic compounds. See, for example, U.S. Pat. Nos. 5,443,791 and 5,708,158.

The following examples are provided for illustrative purposes and are not meant to be limiting in any way.

Examples Example 1. Cloning and Sequencing of Rat, Porcine, Bovine, Equine, Ovine, Canine, and

Feline TLR9

Cells and Tissues. Lymphoid tissues, primarily spleen or blood mononuclear cells

(PBMC) from five mammalian species were collected: mouse, pig, bovine, rat and horse.

Spleen samples were collected in RNAlater™ (Ambion®, Austin, TX, USA), stabilized at 4°C overnight and stored at -70°C. Blood samples were centrifuged at 500 x g for 25 min at room temperature and the buffy coat, containing enriched PBMC, was then removed and stored at -70°C. The mouse specimen was used as a comparative positive control. First-strand cDNA synthesis. Total RNA from the spleen and PBMC samples was isolated using a monophasic solution of phenol and guanidine isothiocyanate: TRIzol™ reagent (GIBCO BRL®, Burlington, ON, Canada) according to the manufacturer's instructions. First-strand cDNA was synthesized from the total RNA using SUPERSCRIPT™ II reverse transcriptase (GEBCO BRL®, Burlington, ON, Canada).

Approximately 3 μg of total RNA was added to 50 pmoles of oligo(dT) primer [poly T(18)]; the mixture was heated to 70°C for 10 min and subsequently chilled on ice. The following was added to the cooled reaction mixture: 1 μl of mixed dNTP stock containing 10 mM each dATP, dCTP, dGTP and dTTP (Amersham Pharmacia Biotech Inc., Baie de Urfe, Quebec) at neufral pH, IX first strand buffer (50 mM Tris-HCl pH 8.3/ 75 mM KCl/ 3 mM MgCl2) and 2 μl of 0.1 M DTT. The mixture was subsequently heated to 42°C for 2 min, followed by addition of 200 units of SUPERSCRIPT™ II reverse transcriptase. The reaction was carried out at 42°C for 50 min, followed by 70°C for 15 min. The first-strand cDNA was used as the template for subsequent polymerase chain reaction (PCR) amplifications. PCR amplification. TLR9 gene was PCR amplified from each of the above- mentioned species using primers designed from known mouse and human TLR9 sequence in Genbank: Accession AF314224 and AF259262, respectively. The primers were designed using the primer design software, Clone Manager 5 (Scientific and Educational Software, Durham, NC, USA). TLR9 gene-specific primers used were: forward primer 5'-ACCTTGCCTGCCTTCCTACCCTGTGA-3' (SEQ DD NO:37) and reverse primer 5'-GTCCGTGTGGGCCAGCACAAA-3' (SEQ DD NO:38). The 2.7 Kbp fragment was PCR amplified using Advantage® 2 DNA polymerase mix (BD Biosciences Clontech, Palo Alto, CA, USA) according to the manufacturer's instructions. PCR reaction volumes of 25 μl contained 15 pmoles of each primer, 0.2 mM of dNTP mix and 1 μl of reverse transcription reaction. PCR amplification was conducted by initial denaturation at 94°C for 1 min followed by 30 cycles of 94°C denaturation (15 sec), 65°C annealing (45 sec) and 72°C extensions (2 min), with a final extension at 72°C for 5 min.

Cloning and sequencing. The PCR amplified fragment was treated with 500 units of T4 DNA polymerase (Amersham Pharmacia Biotech Inc., Baie de Urfe, Quebec) for 15 min at room temperature prior to cleaning the reaction with QIAquick PCR purification kit

(QIAGEN Inc., Mississauga, ON, Canada). The fragment was then ligated to pZErO™ - 2 vector (Invitrogen™ Life Technologies, Burlington, ON, Canada), treated with Eco RV restriction enzyme, using T4 DNA Ligase (GEBCO BRL®, Burlington, ON, Canada). E. coli TOP 10 chemically competent cells (Invitrogen™ Life Technologies, Burlington, ON, Canada) were used to transform ligated products. Plasmids containing the 2.7 Kbp fragment were sequenced using an automated DNA sequencer, CEQ™ 2000XL DNA analysis system (Beckman Coulter Inc., Fullerton, CA, USA).

Sequences ofthe 2.7 Kbp fragment were derived from three clones of each species selected from independent PCR reactions to account for errors that may have been incurred during the PCR amplifications and to confirm the sequence data. Nucleotide sequences ofthe rat, porcine, bovine, equine, ovine, canine, and feline

TLR9 were extended and completed using standard 5' and 3' RACE PCR and primers designed using the sequences obtained from the 2.7 Kbp fragments.

Results. Nucleotide sequences of rat, porcine, bovine, equine, canine, and feline TLR9 cDNA obtained by the methods above are provided as SEQ DD NOs 3, 7, 11, 15, 19, 23, and 27, respectively. Deduced amino acid sequences are provided as SEQ ID NOs 1, 5, 9, 13, 17, 21, and 25, respectively. Deduced amino acid sequences of full-length murine and human TLR9 are provided as SEQ ID NOs 29 and 33, respectively.

Example 2. Comparison of Aligned Sequences for TLR9 from Narious Mammalian Species. Multiple sequence alignment of deduced amino acid sequences for feline, canine, bovine, mouse, ovine, porcine, horse, human, and rat TLR9 polypeptides was performed using Clustal W 1.82 (see, for example, www.cmbi.kun.nl/bioinf/tools/clustalw.shtml). In addition, paired sequence alignment of deduced amino acid sequences for murine and human TLR9 polypeptides was performed using Clustal W 1.82. The results ofthe multiple sequence alignment are presented in Figure 1. As will be appreciated from Figure 1, certain amino acids are highly conserved across all species examined. Similarly, certain amino acids differ only by conservative amino acid substitutions among the various species. In addition, it is evident that certain amino acids which are conserved between murine and human TLR9 are not conserved in other species. Furthermore, Figure 1 also indicates that certain amino acids are highly divergent across various species. The information provided by the comparison of multiple species adds significantly to the information available by comparison between only murine and human TLR9 sequences. The putative transmembrane regions ofthe TLR9 polypeptides are indicated in boxes in Figure 1. Sequence upstream of each transmembrane region is extracellular domain and is believed to include sequence primarily responsible for binding to TLR9 ligands, including CpG DNA. The extracellular domains of feline, canine, bovine, mouse, ovine, porcine, horse, human, and rat TLR9 correspond to amino acids numbered 1-820, 1-822, 1-818, 1- 821, 1-818, 1-819, 1-820, 1-820, and 1-821, respectively, as shown in Figure 1.

Figure 2 presents an evolutionary relatedness tree for six TLR9 polypeptides examined. The cladogram in Figure 2 was prepared using Clustal W (see above). As can be appreciated from this figure, murine and human TLR9 are nearly the most divergent TLR9s in this group. Surprisingly, human and horse TLR9 appear relatively closely related.

Example 3. Reconstitution of TLR9 Signaling in 293 Fibroblasts.

Mouse TLR9 cDNA (SEQ ID NO:31) and human TLR9 cDNA (SEQ ID NO:35) in pT-Adv vector (from Clonetech) were individually cloned into the expression vector pcDNA3. l(-) from Invitrogen using the EcoRI site. Utilizing a "gain of function" assay it was possible to reconstitute human TLR9 (hTLR9) and murine TLR9 (mTLR9) signaling in CpG-DNA non-responsive human 293 fibroblasts (ATCC, CRL-1573). The expression vectors mentioned above were transfected into 293 fibroblast cells using the calcium phosphate method. Since NF-κB activation is central to the IL-l/TLR signal transduction pathway

(Medzhitov R et al. (1998) Mol Cell 2:253-258; Muzio M et al. (1998) JExp Med 187:2097- 101), cells were transfected with hTLR9 or co-transfected with hTLR9 and an NF-κB-driven luciferase reporter construct. Human fibroblast 293 cells were transiently transfected with hTLR9 and a six-times NF-κB-luciferase reporter plasmid (NF-κB-luc) or with hTLR9 alone. After stimulus with CpG-ODN (2006, 2μM, TCGTCGTTTTGTCGTTTTGTCGTT, SEQ DD NO:58), GpC-ODN (2006-GC, 2μM, TGCTGCTTTTGTGCTTTTGTGCTT, SEQ DD NO:59), LPS (100 ng/ml) or media, NF-i B activation by luciferase readout (8h) or IL-8 production by ELISA (48h) were monitored. Results representative of three independent experiments showed that cells expressing hTLR9 responded to CpG-DNA but not to LPS. Independently, human fibroblast 293 cells were transiently transfected with mTLR9 and the NF-κB-luc construct or with mTLR9 alone. After stimulation with CpG-ODN (1668, 2μM; TCCATGACGTTCCTGATGCT, SEQ ID NO:60), GpC-ODN (1668-GC, 2μM; TCCATGAGCTTCCTGATGCT, SEQ DD NO:61), LPS (100 ng/ml) or media, NF-κB activation by luciferase readout (8h) or IL-8 production by ELISA (48h) were monitored. Results showed that expression of TLR9 (human or mouse) in 293 cells results in a gain of function for CpG-DNA stimulation. To generate stable clones expressing human TLR9, murine TLR9, or either TLR9 with the NF-κB-luc reporter plasmid, 293 cells were transfected in 10 cm plates (2x10 cells/plate) with 16 μg of DNA and selected with 0.7 mg/ml G418 (PAA Laboratories GmbH, Cόlbe, Germany). Clones were tested for TLR9 expression by RT-PCR. The clones were also screened for IL-8 production or NF-κB-luciferase activity after stimulation with ODN. Four different types of clones were generated.

293-hTLR9-luc: expressing human TLR9 and 6-fold NF-κB-luciferase reporter

293-mTLR9-luc: expressing murine TLR9 and 6-fold NF-κB-luciferase reporter

293-hTLR9: expressing human TLR9 293-mTLR9: expressing murine TLR9

Results indicated that stable clones also responded to CpG-ODN.

Example 4. Similar ODN Sequence Specificity of TLR9 of Human and Equine TLR9. 3xl06 293T cells were electroporated with 5μg NF-κB-luc plasmid and 5 μg of either horse TLR9-pcDNA3.1 plasmid or humanTLR9-pcDNA3.1 plasmid at 200V, 975 μF. After the electroporation the cells were plated in 96-well cell culture plates at 2.5x104 cells per well and grown overnight at 37°C. The cells were stimulated with the indicated concentration of ODN for 16h, after which the supernatant was removed and the cells lysed in lysis buffer and frozen for at least 2 hours at -80°C. Luciferase activity was measured by adding Luciferase Assay substrate from Promega. Values are given as fold specific induction over non- stimulated control. Results are shown in Figure 3.

As shown in Figure 3, ODN 2006 (TCGTCGTTTTGTCGTTTTGTCGTT; SEQ DD NO:58) has a strong specificity for human TLR9. ODN 1982 (TCCAGGACTTCTCTCAGGTT; SEQ ED NO:70) was the negative control ODN. ODN 5890 (TCCATGACGTTTTTGATGTT; SEQ ID NO:39) has a strong specificity for mouse TLR9. This experiment demonstrates the similarity of horse TLR9 to human TLR9 in binding specificity, a result predicted by the evolutionary relatedness of horse TLR9 to human TLR9. Mouse TLR9 is more distant from horse TLR9 and human TLR9 in sequence homology, and ODN 5890 was not detected by either human or horse TLR9.

Example 5. Non-human, Non-murine Native Mammalian TLR9 Useful in Screening for Human-Preferred CpG DNA.

Native rat, porcine, bovine, equine, and ovine TLR9 polypeptides are screened for binding or TLR9 signaling activity when contacted with human-preferred CpG DNA (ODN 2006). Rat, porcine, bovine, equine, or ovine TLR9 polypeptides which exhibit significant TLR9 binding or TLR9 signaling activity in this assay are then used as the basis for screening for additional human-preferred CpG DNA. An expression vector containing a nucleic acid sequence encoding a selected native rat, porcine, bovine, equine, or ovine TLR9 polypeptide, and optionally a reporter construct, is introduced into cells which do not express TLR9. The cells expressing the selected native rat, porcine, bovine, equine, or ovine TLR9 polypeptide are contacted with candidate human-preferred CpG DNA. Candidate human-preferred CpG DNA exhibiting significant TLR9 binding or TLR9 signaling activity are selected as human- preferred CpG DNA.

Example 6. Chimeric TLR9 Useful in Screening for Human-Preferred CpG DNA.

Chimeric TLR9 polypeptides are screened for binding or TLR9 signaling activity when contacted with human-preferred CpG DNA (ODN 2006). Chimeric TLR9 polypeptides which exhibit significant TLR9 binding or TLR9 signaling activity in this assay are then used as the basis for screening for additional human-preferred CpG DNA. An expression vector containing a nucleic acid sequence encoding a selected chimeric TLR9 polypeptide, and optionally a reporter construct, is introduced into cells which do not express TLR9. The cells expressing the selected chimeric TLR9 polypeptide are contacted with candidate human- preferred CpG DNA. Candidate human-preferred CpG DNA exhibiting significant TLR9 binding or TLR9 signaling activity are selected as human-preferred CpG DNA.

Example 7. Chimeric TLR9 Responsive to Both Human-Preferred and Murine-Pref erred CpG DNA. Chimeric TLR9 polypeptides are screened for binding or TLR9 signaling activity when contacted with human-preferred CpG DNA (ODN 2006) and also screened for binding or TLR9 signaling activity when contacted with murine-preferred CpG DNA (ODN 1668). Chimeric TLR9 polypeptides which exhibit significant TLR9 binding or TLR9 signaling activity in each of these assays are then used as the basis for screening for additional human- preferred CpG DNA and for screening for additional murine-preferred CpG DNA. An expression vector containing a nucleic acid sequence encoding a selected chimeric TLR9 polypeptide, and optionally a reporter construct, is introduced into cells which do not express TLR9. The cells expressing the selected chimeric TLR9 polypeptide are contacted with candidate human-preferred CpG DNA or candidate murine-preferred CpG DNA. Candidate human-preferred CpG DNA exhibiting significant TLR9 binding or TLR9 signaling activity are selected as human-preferred CpG DNA. Candidate murine-preferred CpG DNA exhibiting significant TLR9 binding or TLR9 signaling activity are selected as murine- preferred CpG DNA.

Equivalents

The foregoing written specification is considered to be sufficient to enable one skilled in the art to practice the invention. The present invention is not to be limited in scope by examples provided, since the examples are intended as a single illustration of one aspect of the invention and other functionally equivalent embodiments are within the scope ofthe invention. Various modifications ofthe invention in addition to those shown and described herein will become apparent to those skilled in the art from the foregoing description and fall within the scope ofthe appended claims. The advantages ofthe invention are not necessarily encompassed by each embodiment ofthe invention. All references, patents and patent publications that are recited in this application are incorporated in their entirety herein by reference. We claim:

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