CA2196806A1 - Polynucleotide reagents having nonnucleotidic moieties, and associated methods of synthesis and use - Google Patents
Polynucleotide reagents having nonnucleotidic moieties, and associated methods of synthesis and useInfo
- Publication number
- CA2196806A1 CA2196806A1 CA002196806A CA2196806A CA2196806A1 CA 2196806 A1 CA2196806 A1 CA 2196806A1 CA 002196806 A CA002196806 A CA 002196806A CA 2196806 A CA2196806 A CA 2196806A CA 2196806 A1 CA2196806 A1 CA 2196806A1
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- Canada
- Prior art keywords
- group
- alkyl
- reagent
- hydrogen
- dna
- Prior art date
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- Abandoned
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07H—SUGARS; DERIVATIVES THEREOF; NUCLEOSIDES; NUCLEOTIDES; NUCLEIC ACIDS
- C07H15/00—Compounds containing hydrocarbon or substituted hydrocarbon radicals directly attached to hetero atoms of saccharide radicals
- C07H15/02—Acyclic radicals, not substituted by cyclic structures
- C07H15/04—Acyclic radicals, not substituted by cyclic structures attached to an oxygen atom of the saccharide radical
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F9/00—Compounds containing elements of Groups 5 or 15 of the Periodic System
- C07F9/02—Phosphorus compounds
- C07F9/547—Heterocyclic compounds, e.g. containing phosphorus as a ring hetero atom
- C07F9/655—Heterocyclic compounds, e.g. containing phosphorus as a ring hetero atom having oxygen atoms, with or without sulfur, selenium, or tellurium atoms, as the only ring hetero atoms
- C07F9/65515—Heterocyclic compounds, e.g. containing phosphorus as a ring hetero atom having oxygen atoms, with or without sulfur, selenium, or tellurium atoms, as the only ring hetero atoms the oxygen atom being part of a five-membered ring
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07H—SUGARS; DERIVATIVES THEREOF; NUCLEOSIDES; NUCLEOTIDES; NUCLEIC ACIDS
- C07H21/00—Compounds containing two or more mononucleotide units having separate phosphate or polyphosphate groups linked by saccharide radicals of nucleoside groups, e.g. nucleic acids
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12Q—MEASURING OR TESTING PROCESSES INVOLVING ENZYMES, NUCLEIC ACIDS OR MICROORGANISMS; COMPOSITIONS OR TEST PAPERS THEREFOR; PROCESSES OF PREPARING SUCH COMPOSITIONS; CONDITION-RESPONSIVE CONTROL IN MICROBIOLOGICAL OR ENZYMOLOGICAL PROCESSES
- C12Q1/00—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions
- C12Q1/68—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions involving nucleic acids
- C12Q1/6813—Hybridisation assays
- C12Q1/6816—Hybridisation assays characterised by the detection means
- C12Q1/6823—Release of bound markers
Abstract
Methods and reagents are provided for synthesizing polynucleotides containing modified deoxyribose residues. Monomeric reagents having structural formula (I), wherein R1, R2, R3, R4 and R5 are as defined herein, are used to create polynucleotides having nonnucleotidic moieties -A-Z-(R9)n at the 1 position of selected deoxyribose units. The polynucleotides so provided are useful in a variety of hybridization assay formats.
Description
2 1 ~
Polynucleotide Reagents having nonnucleotidic moieties, and associated methods of synthesis and use.
5 Tf rhnir:~l Field This invention relates generally to nucleic acid chemistry, i.e., DNA synthesis,hyl"iJ;~Liul~ assays, and the like, and to reagents used in conjunction therewith. More partiCularly~ the invention relates to methods and monomeric reagents for rntroducing sites--containing modified d~ ;I,u~ .O;.,..~, pu~ cu~ . The rnvention additionally relates to methods of using the monomeric reagents of the invention and pcl~ ,R,uL;dc reagents synthesized therefrom in DNA hyl)lil;~liull assays.
Backvrrl~
Nucleic acid l~Jb.i.li ~iO~I assays are commonly used in genetic research, biomedical research and clinical diagnostics. In a basic nucleic acid hJI).i.li~Liull assay, the nucleic acid of interest is hybridized, in single-stranded forrn, to a labeled srngle-stranded nucleic acid probe and resultmg labeled duplexes are detected. Variations of this basic scheme have been developed to enhance accuracy, facilitate the separation of the duplexes to be detected from extraneous materials, and/or amplify the signal that is detected.
2 0 Commonly assignGd U. S . Patent No. 5,43û, 13 6, ill~,UI ~IUI _a,1 by reference herein, describes a tectmique whereby selectably cleavable sites are introduced into ~,':,,...,... 1, ..I;Sf chains, enabling release of a detectable label after hJ.JIill;~Liull is complete. As explained in that application, selectably cleavable sites are useful in a number of different types of hJbli~ iUII assay formats. For example, in one type of assay rn which hJbli~ Livll gives 25 rise to a ' ' s~.l",u. ~cl duplex of a labeled probe and sample DNA, a selectably cleavable site contained within the hybrid structure will enable ready separation of the label from the solid support. Commonly assigned U.S. Patent Nos. 4,775,619 and 5,118,605 are respectively directed to the use of restriction _...1. ,... Irl__~_ cleavable sites in such assays and the use of chemically cleavable sites (e.g., disulfide linkages, 1,2-diols, and the like). These 3 0 cleavable sites cam be introduced during . '~ 1 ,1; 1r- synthesis, and are cleavable with restriction ,"rL ,. ,... 1. A - . in the case of restriction sites and with particular chemical reagents, e.g., with thiols, periodate, or the like, in the case of chemically cleavable sites.
Polynucleotide Reagents having nonnucleotidic moieties, and associated methods of synthesis and use.
5 Tf rhnir:~l Field This invention relates generally to nucleic acid chemistry, i.e., DNA synthesis,hyl"iJ;~Liul~ assays, and the like, and to reagents used in conjunction therewith. More partiCularly~ the invention relates to methods and monomeric reagents for rntroducing sites--containing modified d~ ;I,u~ .O;.,..~, pu~ cu~ . The rnvention additionally relates to methods of using the monomeric reagents of the invention and pcl~ ,R,uL;dc reagents synthesized therefrom in DNA hyl)lil;~liull assays.
Backvrrl~
Nucleic acid l~Jb.i.li ~iO~I assays are commonly used in genetic research, biomedical research and clinical diagnostics. In a basic nucleic acid hJI).i.li~Liull assay, the nucleic acid of interest is hybridized, in single-stranded forrn, to a labeled srngle-stranded nucleic acid probe and resultmg labeled duplexes are detected. Variations of this basic scheme have been developed to enhance accuracy, facilitate the separation of the duplexes to be detected from extraneous materials, and/or amplify the signal that is detected.
2 0 Commonly assignGd U. S . Patent No. 5,43û, 13 6, ill~,UI ~IUI _a,1 by reference herein, describes a tectmique whereby selectably cleavable sites are introduced into ~,':,,...,... 1, ..I;Sf chains, enabling release of a detectable label after hJ.JIill;~Liull is complete. As explained in that application, selectably cleavable sites are useful in a number of different types of hJbli~ iUII assay formats. For example, in one type of assay rn which hJbli~ Livll gives 25 rise to a ' ' s~.l",u. ~cl duplex of a labeled probe and sample DNA, a selectably cleavable site contained within the hybrid structure will enable ready separation of the label from the solid support. Commonly assigned U.S. Patent Nos. 4,775,619 and 5,118,605 are respectively directed to the use of restriction _...1. ,... Irl__~_ cleavable sites in such assays and the use of chemically cleavable sites (e.g., disulfide linkages, 1,2-diols, and the like). These 3 0 cleavable sites cam be introduced during . '~ 1 ,1; 1r- synthesis, and are cleavable with restriction ,"rL ,. ,... 1. A - . in the case of restriction sites and with particular chemical reagents, e.g., with thiols, periodate, or the like, in the case of chemically cleavable sites.
4 ~ 6~6 -2~ I //o The present invention is also directed in part to the in~,ul~uul~Liull of selectably cleavable sites into ~ul~..ucl~,v~;~L,.,. The cleavable sites herein are contained within a linker arm present at the I position of a Jcv~yl iL,ùse molecule. In addition to providing such cleavable sites. the invention also relates to the creation of "abasic sites" within 5 pvl~u~ id~", i.e.. monomeric units which contain the d.,~J~.yli1Oa~. ring but do not have a purine or pyrimidine base present at the I position. Such abasic sites are useful in a wide variety of contexts, as will be explained in detail 1.... c;..' ch, ... For example, an abasic site may be used to create branched DNA, i.e., a multimeric poly... cl~,vtilL, structure in which three poly..u~.lcv~iJc chains emanate from a single uev~.ylibuac unit. These branch points are 1 0 extremely useful in providing large, "---ul~i_.i-," DNA structures which cam then be used im assays. Abasic sites may also be used in other ways, e.g., in the synthesis of DNA bound to a solid support (typically although not necessarily at the I position), to reverse the direction of chemical DNA synthesis, i.e., 3'~5' to 5' ~3' or vice versa, and in triple heLx formation.
Thus, in addition to utility in providing cleavable sites wjthin, 'i~ ' ' or l)ul~..u~ ,v~ide chains, the invention enables a number of procedures deriving from the presence of linker arms at the I position of a monomeric dcv~yl ib~/a~. unit rather than purine or pyrimidine bases as present in cu~ liu~ nucleotide structures.
2 0 Overview of thP Art Backgrûund references which relate generally to methods for bylllh~;~
.,1;5 """ l~vl~' include those related to 5'-to-3' syntheses based on the use of,B-cyanoethyl phosphate protecting groups, e.g., de Napoli et al., Gazz Chim rt~l 114:65 (1984), Rosenthal et aL, Tetrrhp~rûn T .PttPrS 24: 1691 (1983),1Belagaje and Brush, Nucleic ~ri~lc F PCP~rrh 10:6295 (1977), in references which describe solution-phase 5'-to-3' syntheses include Hayatsu and Khorana, J American ~'hPmir~l Society 89:3880 (1957), Gait amd Sheppard, ~llrlPir Aririe RP~P~rrh 4 1135 (1977), Cramer and Koster, Aneew ('hPm Int E.l Fn~d _:473 (1968), and Blackbum et al., Journal ofthe Chemical Society, Part C, 2438 (1967).
In addition to the above-cited art, Matteucci and Caruthers, J. AmPrir~n ~hP.n;. ~1 Society 103:3185-3191 (1981), describe the use of ~ .h. ~ in the preparation of r~ 1 vl; !~ ~ Beaucage and Caruthers, Tetrahedron Letters;~:1859-1862 (1981), and U S Patent No 4~415~732 describe the use of l l ~ in the preparation of . _, .. , ., .. , .. . _ , _ , , 2~96806 '~ r s ~ WO96/06104 3 PCT/US95/10776 . vL; !r~ Smith, ABL 15-24 (December 1983), describes automated solid-phase o:;gvJ~v~yl il ;-, ,. .1, . .~h;P synthesis. See also the references cited therein, and Warner et al., DNA 3 :401411 (1984), whose disclosure is h~,u~5~u~ J herein by reference.
U.S. Patent Nos. 4,483,964 and 4,517,338 to Urdea et al. describes a method for S ~y..~h.,~ g pol~"...,l~,vfid~,s by selectively introducing reagents to a solid phase substrate in a tubular reaction zone. U.S. Patent No. 4,910,300 to Horn et al. also describes a method for ~y~lih.,~ g rl;r","." If . ,I;s~ - by sequentially adding nucleotidic monomers to a growing chain, but involves the in~ùl ~u~ ~L;ull of labelled, N-4 modified cytosine residues at ~-~d~ ... J, spaced apart positions. U.S. Patent No. 5,256,549 to Horn et al. is also of 1 û interest in that a method for preparing .~ f vl;: - is provided which involves a -6. .,. technique, i.e., in which the desired ,~ . ,"",.1. v~ is essentially synthesized and "purified" ~ f. ~ ly~ such that the final product is produced in ~ , pure form.
HomandUrdea,DNA5(5):421-425(1986),describe~uhv~vhvlyl~Liullofsolid-15 supported DNA fragments using bis(~ ..u~il.w~y)-N,N-diisopropyl ,t ~ See also, Horn and Urdea, Tetrahedron T PtfPr~ 27:47054708 (1986).
References which relate to hybl;J;~L;ùn techniques in general include the following:
Meinkoth and Wahl, Anal. Biol '...,. ny 138:267-284 (1984), provide an excellent review of hys,l;J;~L;u~ techniques. Leary et al., Proc. Natl. Ar Irl Sci. ~fUSA) 80:4045-4049 (1983) 2 0 describe the use of biotinylated DNA in conjunction with an avidin-enzyme conjugate for detectionofspecifico!;,~v,,lcl~.vL;Jesequences. R~nkietal.,Gene21:77-85,describewhat they refer to as a "sandwich" hylJI;J;~L;ull for detection of, .I;g. ,~ sequences.
Pfeuffer and Helmrich, J. Biol. Chem. ~:867-876 (1975), describe the coupling ofguanosine-5'-0-(3-i'i . ' - . ' ) to Sepharose 4B. Bauman et al., J. Hi~fr r hPm ~n~
Cvtochem 29:227-237, describe the 3'-labeling of RNA with fluorescers. PCT Application 7 describes the addition to DNA fragments of modified l;b.. If vl ;. l. for labeGng and methods for analyzing such DNA fragments. Renz and Kurz, Nucl. Ari~c Rr~
12:3435-3444, describe the covalent linking of enzymes to u~ ; ' - Wallace, DNA
R~ ~ T~ Woo, S., ed.) CRC Press, Boca Raton, Florida, provides a 3 0 general background of the use of probes in diagnosis. Chou and Merigan, N. ~;n,p J of ~L 308 921-925, describe the use of a ~ JI~5~e-labeled probe for the detection of CMV. Lnm3r~ M,-fhr,l~ in Fn7vmol 34B, 24:77-102 (1974), describes procedures for Wos6/06io4 &~S6 ~ //6 linking to poly~,.,.yhu~l;d~,." while Parikh et al., Methods in Enzymol. 34B, 24:77-102 (1974) describe coupling reactions with agarose. Aiwine et al., Proc. Natl. Acad. Sci. (USA) 74:5350-5354 (1977), describe a method of transferring .~ from gels to a solid support for hyblici;LGl;ull. Chu et al., Proc. Natl. Acad. Sci. (USA) 11 :6513-6529, describe a technique for derivatizing temlinal nucleotides. Ho et ai., F~ . .h. . . ,;~l ~y 20:64-67 (1981), describe derivatizing temlinal nucleotides through phosphate to fomm esters. Ashiey and MacDonaid, Anai. Bionh~m 140.95-103 (1984), report a method for preparing probes from a surface-bound template.
Home and Dervan, J. Am. Chem. Soc I i2:2435-2437 (1990), and Froehier et ai., Bi(lrh~mi~hv 31: 1603- 1 ~)9 (1992), relate to . .1;.~ r vl ;- Ie-directed triple helix formation.
Summarv of the Inv~ nti~ln in one aspect of the invention, then7 monomeric reagents useful for providing the 15 novel polyllu~levL;de structures are provided, the monomeric reagents having the structural fommula (I) ~ R4 ~ ~Rs wherein:
R' is selected from the group consisting of hydrogen, acid-sensitive, base-stable protecting groups and acyl capping groups;
R2 is a phosphorus derivative selected to enable addition of the reagent to a 30 molecular species containing a free hydroxyl group, or is a linkage to a solid support;
R3 is selected from the group consisting of hydrogen, hydroxyl, sulfhydryl, halogeno, amino, aikyl, allyl~ oR6 wherein R6 is alkyl, allyl, silyl or phosphate;
~ WO96/06104 19680~ s ' r~ 6 R4 is either hydro~en or -(CH2)mOR7 wherein R' is alicyl or -(Co)R5, R5 is alL-yl, and m is an integer in the range of 0 to 12 inclusive;
Rs is ~A~Z~X(R9)n;
A is oxygen, sulfur or methylene;
~ 5 Z is arylene, C6-C,5 aralicylene or C~-C~z alkylene containing 0 to 6 I.~,Ltlu~.Lu,.. .
selected from the group consisting of O, S, N, Si and Se and 0 to 6 linL-ages selected from the group consisting of -CO-,-COO-, -CONH-, -NHCO-, -S-S-, -SOz-, -CH(OH)-CH(OH)-, -CH(oR4)-CH(oR4)-, -O-PO(O~-O-, -o-Po(R4)-,-o-Po(oR4)-o-7 -o-Po(oR4)-R5- and -Po(oR4)-o-R5- in which R4 is lower aiLyl and R5 is lower alLylene, and, if Z is aralLylene or 10 allylene, containing 0 to 3 unsaturated bonds;
X is selected from the group consisting of-NH-, -CONH-, -NHCO-, -CO-, -S- and -SiE;
R9 is hydrogen, a protecting group, a detectable label, or, uniess X is _SjE, a solid support; and n is I when X is -NH-, -CONH-, -NHCO-, -CO-, or -S-, and is 3 when X is -Si=.
In another aspect, ~oir..,~ ,Li i~ reagents are provided having the structurai formulae (II), (III) or (IV) ~ ~lo ~ o--P--" ~ R
Rs . O R~
2 5 11 o--P--o-- ~ ~ to A 1--~
a r ~9~Q6 WO 96106104 - 6 - - - r~ O
s ~C--p_ ~ 4 (111) O~ R
5'- ~ c-&~o~ 4 ~1~ \~p~
(IV) ~ P-O -~ IDN~ ~S-C~
wherein DNA, represents a first segment of DNA DNA~ represents a second segment of DNA and R3, R~ and R5 are as defined above. In a related aspect of the invention, branched DNA is provided having the structural formula (V) WO96/06104 9680~ 7 r~l~u..,J,i l16 1~~ ~hlA~ ~- c - ~- O ~
~ CA ~ a l'l A ~ 1-- ~ l~
~ ~ lP o ~ o ~.~
10 wherein DNA,, DNA2 and DNA3 represent firso second and third segments of DNA, and R;, R', A and Z are as defined above.
In still other aspects of the invention, methods are provided for synthesizing pcl~ iJ~ containing abasic sites and for preparing branched DNA. These methods involve the ;-,~u- ~,u, 4L;UII of the above-mentioned monomeric reagent into larger 15 p~ ..u~,L,uL;de structures.
A method is also provided for detecting the presence of an ~I g- ~ u~ e sequenceof interest in a sample which involves hybridizing the nucleic acid sample with a pGlJ"~,leolide probe containing an abasic site as described herein, wherein the abasic site is formed from the monomeric reagent defined above, and fiurther wherein the reagent contains 2 0 a detectable label at R3 and a cleavable site within the linker moiety -Z-. Either the sample or the po .~ ,vLide probe is bound to a solid support, such that hybridization results in a label being bound to the support through the cleavable site. Following l,yb, ;.1;~4fio-" the cleavable site is cleaved with a suitable reagent so as to release the detectable label R3, and label which is free of the support is quantitated and correlated with the presence andlor quantity of 2 5 sample.
Additionally, probes synthesized using the compounds of the invention may contain 3'-3' linkages, as illustrated in structures (Ill) and (IV) above. Ol;6oue~J~.yllu~l~ul;ll~ probes containing 3'-3' linkages can be used in triple helix formation, i.e., as such probes can bind to opposite strands of duplex DNA.
WO96/06104 2~ 96~~6 - 8i - P~ /6 1 pPt~ i Descrivtion of the Invention Definitions and .~. ," .. ,1 l ". ,:
Before the present invention is disclosed and described in detail, it is to be understood that this invention is not iimited to specific assay formats, materials or reagents, 5 as such may, of course, vary. It is aiso to be understood that the i ~ vJ used herein is for the purpose of describing particular r ~1 ~0/~ oniy and is not intended to be limiting.
It must be noted that, as used in the ~ ;..,. amd the appended claims, the singular forms "a," "an" and "the" include plurai referents uniess the context clearly dictates otherwise. Thus, for example, reference to "a monomeric reagent" includes mixtures of 10 monomeric reagents, reference to "a pu4..l~,1evL;de probe" may include mixtures of different probes, reference to a po4..~1vlLvLiJc containing "an abasic site" includes l~u4~u~,lvvLi;lC~
containing two or more abasic sites, and the like.
In this ~ .", and in the claims which follow, reference will be made to a number of terms which shail be defined to have the following meanings:
As used herein, the terms "~u4.~ evLi ie'~ and ". 1~ " shail be generic to pcl~J~vAyl ;1~ L ..1;.5. ~ (containing 2-deoxy-D-ribose), to ~uly. ;1..., . 1 .1; 1. (containing D-ribose), to any other type of po4..v~ Iev~ide which is an N-giycoside of a purine or pyrimid;ne base, and to other polymers containing ~ backbones (e.g., protein nucleic acids and synthetic sequence-specific nucleic acid polymers vUIIIII~ available 2 0 from the Anti-Gene Development Group, Corvailis, Oregon, as NeugeneTM polymers), providing that the polymers contain .,. ,. 1~ ob ~-~ in a ~ 5v ~iun which ailows for base pairing and base stacking, such as is found in DNA and RNA. There is no intendeddistinction in length between the term "I,c~l~.lJ~ .vLi ic" and "~ , ' ' ," and these terms wiii be used i..a,l.,ik llvvdW~ . These terms refer oniy to the primary structure of the 25 molecule. Thus, these terms include double- and single-stranded DNA, as weii as double-and single-stranded RNA amd DNA:RNA hybrids, amd aiso include known types of , for example, labels which are known in the art, methylation, "caps,"
substitution of one or more ofthe naturaily occurring nucleotides with an anaiog, inter-nucleotide " .... ~ . 6... ,~ such as, for example, those with uncharged linkages (e.g., methyl 30 1,l,,.~l,l,,~,, lr~ 1s ~ n' .~ ,carbamates,etc.)andwithchargedlinkages (e.g.,, ' , ' , ' ~Lua~llvlvd;llliùaLca, etc.), those containing pendant moieties, such as, for exarnple, proteins ~mcluding nucleases, toxins, antibodies, signai 2l968a6 096/06~04 9 : r~ 3~ 6 peptides, poly-~lysine, etc.), those with u~lL~Lu~ (e.g., acridine, psoralen, etc.), those containing chelators (e.g., metals, radioactive metals, boron, oxidative metals, etc.), those ~ containing alkylators, those with modified linkages (e.g., alpha anomeric nucleic acids, etc.), as well as unmodified forms ofthe polyl~uclcv~;dc or nl;g.. ~ ! vil~lf The term ",uu~ u~ ,vLIc analyte" or ",uvlyllucl~vL;df~ sample" refers to a single- or double-stranded nucleic acid molecule which contains a target nucleotide sequence. The analyte nucleic acids may be from a variety of sources, e.g., biological fluids or solids, food stuflfs, cll~;lull~ ,...dl materials, etc., and may be prepared for the hylJl;di~ iUII analysis by a variety of means, e.g., proteinase K/SDS, chaotropic salts, or the like. The term 10 "~ulJ...~ v~;L analyte" is used hllclu;~ge.lbly herein with the terms "analyte," "analyte nucleic acid," "target" and "target molecule." As used herein, the term "target region" or "target nucleotide sequence'' refers to a probe binding region contained within the target molecule. The term "target sequence" refers to a sequence with which a probe will form a stable hybrid under desired conditions.
It will be appreciated that, as used herein, the terms "uu~,k,06;de" and "lluclevt;dc"
will include those moieties which contain not only the known purine and pyrimidine bases, but also other L~,t~,.ul,y~ bases which have been modified. Such ~ include methylated purines or uy ~ " , acylated purines or pyrimidines, or other h.,t~,l u~,y~
Modified nucleosides or nucleotides will also include ~ on the sugar moiety, e.g., 2 0 wherein one or more of the hydro~syl groups are replaced with halogen, aliphatic groups, or are ~ " ,. l ;. ", l . 1 as ethers, amines, or the like.
As used herein, the term "probe" refers to a structure comprised of a poly..u~,lwl dc, as defined above, which contains a nucleic acid sequence ~ . ' y to a nucleic acid sequence present in the target molecule. The pol y l~u~.L,vL;Ic regions of probes may be 25 composed of DNA, and/or RNA, and/or synthetic nucleotide analogs.
The terms "nucleic acid multimer" or " ~ multimer" are used herein to refer to a linear or branched polymer of the same repeating single-stranded ~ vl;~le unit or different srngle-stranded puly~.ull~,vL;de units, each of which contains a region where a label probe can bind, i.e., contains a nucleic acid sequence ~ u"~l~l l A y to a nucleic acid 30 sequence contained within a label probe; the ~ vl; l~ units may be composed of RNA, DNA, modified nucleotides or r.~ thereo~ At least one of the units has a sequence, length, and, .. ,. ,.~ that permits it to bind specifically to a segment of a target WO 96/06l04 ~ 10 A ~,~ /i~ / /6 poly.l..~ ,vL;de; typically, such units will contain ~ y 15 to 50, preferably 15 to 30, nucleotides, and will have a GC content in the range of about 20% to about 80%. The total number of ~ ,I g~ f units in the multimer will usually be in the range of about 3 to 1000, more Iypically in the range of about 10 to 100, and most typicaily about 50. In one S type of bramched muitimer three or more ul;g, - ~ units emanate from a point of origin to fomm a bramched structure. The point of origin may be amother nucleotide unit or a molecule to which at least three units can be covaiently bound. In another type, there is an e 'i~ ' le unit backbone with one or more pendamt o~ g. . I~v~units linked to branch points in the backbone. These latter-type multimers are "fork-like,"
"comb-like" or ' "fork-" and "comb-like" in structure, wherein "comb-like"
muitimers are pu' ~ clcvLid~,~ having a linear backbone with a muitiplicity of sidechains extending from the backbone. Typically, there will be at least two branch points in the mUltimer~ more preferably at least three, more preferably in the range of about 5 to 30, although in some ~" l o~ there may be more. The multimer may include one or more1~ - lPV~ ; segments (e.g., comprised of protein nucleic acids or synthetic sequence-specific nucleic acid polymers, as noted above with respect to "~uly~ .lev~id~,~" in general), and one or more segments of double-stranded sequences. Further infommation concerning multimer synthesis and specific muitimer structures may be found in commoniy assigned U.S.
Patent No. 5,124,246 to Urdea et al.
2 o As used herein, a "biologicai sample" refers to a sample of tissue or fluid isolated from an individual, including but not limited to, for example, plasma, serum, spinal luid, semen, Iymph fluid, the extemal sections of the skin, respiratory, intestinal, and g y tracts, tears, saliva, milk, blood cells, tumors, orgams, amd also samples of in vilro cell culture constituents (including but not limited to conditioned medium resulting from the growth of cells in cell culture medium, putatively viraily infected cells, I~,ul~b;llrlllL celis, and cell components). Preferred uses of the present method are in detecting and/or q ~ virai antigens, such as from hepatitis B virus ("HBV"), hepatitis C virus ("HCV"), hepatitis D
virus ("HDV"), human ;., .... ~d 1~..;.... y virus ("HIV"), and the herpes family of viruses, includmg herpes zoster (chicken pox), herpes simplex virus I & Il, r;yi v;' .:.u~, Epstein-3 0 Barr virus, and the recently isolated Herpes VI virus.
By "protecting group" as used herein is meamt a species which prevents a segment of a molecule from undergoing a specific chemical reaction, but which is removable from the ..... .. , . ..... ..... . , ...... _ . . .. . . _ .. . _ ... . . ... ... . . _ . . , ... _ _ 2196~o~
~ WO 96/061~ PCT/US9S/10776 molecule following completion of that reaction. This is in contrast to a "capping group,"
which " I!! binds to a segment of a molecule to prevent any further chemical r. ", . -~ , 1 of that segment.
By "abasic site," as noted above, is meant a monomeric unit contained within a puly~ ,le~ide chain but which does not contain a purine or pyrimidine base. The term is used hlle~ herein with "modified dc.)~.ylil~ose residue". That is, the monomericunits used in conjunction with the method of the invention contain the dc~ y~ ibos~ ring but do not have a purine or pyrimidine base present at the I position.
The term "alkyl" as used herein refers to a branched or unbranched saturated h~ Ub-)ll group of I to 24 carbon atoms, such as methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, t-butyl, octyl, decyl, tetradecyl, hexadecyl, eicosyl, tetracosyl and the like.
Preferred alkyl groups herein contain I to 12 carbon atoms. The term "lower alkyl" intends an alkyl group of one to six carbon atoms, preferably one to four carbon atoms.
The term "alkylene" as used herein refers to a bifunctional saturated branched or unbranched l-yJ~ ,G.l,o-- chain containing from I to 24 carbon atoms, and includes, for example, methylene (-CH2-), ethylene (-CH2-CH2-), propylene (-CH2-CH2-CH2-), 2-methyl-propylene [-CH2-CH(CH3)-CH2-], hexylene [-(CH2)6-] and the like. "Lower alkylene" refers to an alkylene group of I to 6, more preferably I to 4, carbon atoms.
The term "aryl" as used herein refers to an aromatic species containing 1 to S
aromatic rings, either ",.~.,1,~61,.t. J or substituted with I or more substituents typically selected from the group consisting of-(CH2)~-NH2, -(CH2),~-COOH, -NO2, halogen and lower alkyl, where x is an integer in the range of 0 to 6 inclusive as outlined above. The term "aralkyl" intends a moiety containing both alkyl and aryl species, typically containing less than about 24 carbon atoms, and more typically less than about 12 carbon atoms in the alkyl segment of the moiety, and typically containing I to 5 aromatic rings. The term "aralkyl"
will usually be used to refer to aryl-substituted aikyl groups. The term "~lkyl,.l.~" will be used in a similar manner to refer to moieties containing both alkylene at~d aryl species, typically containing less than about 24 carbon atoms in the alkylene portion and I to 5 aromatic rings in the aryl portion, and typically aryl-substituted alkylene.
3 0 The term "arylene" refers to a difunctional aromatic moiety; "Il~v~lu~ , arylene"
refers to a phenylene group. These groups may be substituted with up to four ring substi-tuents as outlined above.
- 2~ Q~
WO96/06104 - 12- .._11~)~,3J~_//6 "Optional" or "optionaliy" means that the ~ubal;~u.,.lLly described event or uil~.ulllaL~ may or may not occur, and that the description includes instances where said event or ~,;., occurs and instances where it does not. For example, the phrase "optionally substituted alkylene" means that an alicylene moiety may or may not be 5 substituted and that the description includes both ~ alicylene and alicylene where there is 5nhctitntinn The Monomeric Reagents of the Invention:
The monomeric compounds of the invention which are used to create abasic sites 10 within pul~..u~,le~)L;.ie structures have the formula (I) (I) . ~, OR R
with R~, R2, R3, A, Z, X and n as defined above. It may be seen that reagent (I) is composed 2 o of a de~J,Lyl ;i,ose ring, containing substituents Rl and R2 at the 5 and 3 positions, respectively, which enable ;~U~u~,L;ull ofthe reagent into a pulylluclc~)L;de chain using coll~ ullol chemical DNA synthesis techniques. The moiety -A-Z-X(R9)~ at the I position replaces the purine or pyrtrnidine base normally present in a nucleotidic structure, and, as may be deduced from the def nition of R9, may be an u..~.,uL~Lci moiety, a protected 2 5 moiety, a labeled moiety, or a linker which is bound to a solid support.
Rl is, as noted above, a base-stable, acid-sensitive blocicing group. Such blocking groups are well-known in the art of..~ f synthesis and include u. ~ ~h~l;l..lr~ or substituted aryl or aralkyl groups, where the aryl is, e.g., phenyl, naphthyl, furanyl, biphenyl, or the liice, and where the substituents are from û to 3, usually to û to 2, and include any 3 0 ~ - I'rl ;1 Ig stable groups, neutral or polar, electron-donating or w;Lhll~w;ug. Examples ofsuchgroupsare.~ ,uAyLl;Lyl(DMT)~ b~yLI;Lyl(MMT)~tritylandpixyL A
particularly preferred moiety for use herein is DMT.
2l968~6 '' , wo 96/06104 - 13 - - r~ ,.,sl.~776 R2 is a phosphoriis derivative which is selècted so as to facilitate .,, 1 -0.~., of the reagent with the 5'-hydroxyl group of a nucleoside or an ~ IP chain. Such groups include I ' . ' ' ~ Jhù~iJhv~l k~s~ 7 pl~ , phosphites, H-~iJhuDiJllulull~oat~,~, and the like (see, e.g., EP Publication No. 0225807 by Urdea et al., 5 "Solution Phase Nucleic Acid Sandwich Assay and Poly"u~,L,uli(ie Probes Useful Therein,"
the disclosure of which is hl~,uliJul~lLr~d by reference herein.) Particularly preferred groups useful as R2 are iJhOaiJllul~L~IuJilt:~ having the structure:
N(iPr)~
1 0 _p~
O--Y
wherein Y is selected from the group consisîing of methyl and ~-cyanoethyl, and "iPr"
represents isopropyl. Most preferably, Y is ~3-cyanoethyl.
Aiternatively, R2 may be a linicage to a solid support, typically through a carbonyl moiety. That is, R2 may be -(CO)-RIc wherein Rl~ represents the solid support.
As noted above, the Rl and RZ substituents are generally selected so as to ailow;n~UI iJUI .l~;UII of the monomeric reagent (I) into a DNA fragment using standard r, chemistry protocols, well icnown in the art, and described, for example, in a2 0 number of the references cited hereinabove. In general, to incorporate the monomeric reagent (I) into a poly"u~ ide chain, the RZ substituent is selected so as enable reaction of the reagent at that position (i.e., the 3 position) with the 5'-hydroxyl group of a nucleoside or an ol ~ " 1 ul ;rl~ chain, while the Rl moiety is selected so as to enable reaction of the reagent at that position (i.e., the 5 position) with the 3'-hydroxyl of a nucleoside or an 25 ..li",.",.. 1. ~.~j.le chain.
Examples of preferred monomeric reagents r ~ L ~ d by structural formula (I) include the foiiowing:
WO96/06104 ~.96~~ .3,l "6 ~
--~R2 0-- --O' Z~ COCP3 R O
oR2 Z--N~
oR2 2l96Bo6 R/O~ NO z R10 O~S--S O~ 0 oR2 , S~
R10_~0 ~
oR2 .
R10 ~S--S ,~
-~ O
oR2 WO96/06104 Qo~6 r~ JU"6 ~,~9 1 6 -O
R10_, O~ ~ O--P--O-~ CH3 OH
oR2 ~lo O~s~
-~
R~O o~Si(CH3)3 ~Y
2s oR2 3 o O
~lo~ ~J ~C~H
3 5 oR2 2l968o6 ~ WO96/06104 17 PCT/US95/10776 S~O--~ t--RIO_~O~
RIO_~o~O~NH--CPG
oR2 Pul.yll..clcJL;;ie Reagents Containing Abasic Sites:
The ~-u'~ .-uclculide reagents of the invention which contain abasic sites are prepared using standard DNA synthesis chemistry and replacing a fraction of the nucleotidic monomers with n~ reagent (1). Generally, c~ w~ l.y I to 100% ofthe monomers used to synthesize the polynucleotide reagent will be replaced with reagent (1), more preferabiy 10 to 50~/0. and most preferably 20 to 40~/0 Generally, about 0 to 10 bases will be h~ul~ù~ e~l between n.~ r ~ n ~ monomer units. It is preferred, particularly when the R9 group is a large, bulky substituent, that the n~ t~ ' monomers (I) be spaced apart within the IJulyllu11.,vL;de chain. In such a case, at least about 3 bases should be ir.~u. ~)u. ~:Le i between monomer units to minimize steric interference or d ~ ~ -These pulr.~uuieuL;de reagents will generally have the structurai formuiae (Il), (111) or (IV) as shown above.
The polynucleotide reagents of the invention may be used as probes in a wide variety of hybridization assays such as those described in commonly assigned U.S. Patent Nos.
4,775,619 to Urdea et al., 4,868,105 to Horn et al., 5, i 18,605 to Urdea, 5, I Z4,246 to Urdea WO96/06104 ?~96~L6 - 18 - P~ 't~ 6 et al., 5,200,314 to Urdea~ as well as in PCT Publication Nos. 89/03891 (inventors Urdea et al.) and 92/22671 (inventors Horn et al.). Additionally, with respect to structures (Ill) and (IV), it shouid be noted that a 3'-3' linkage is provided, enabling use ofthe probes in triple helix formation.
In some cases, the linker arm present in n~ - - " ;~ monomer units resulting from ;n~ul~JuldLiUl~ of reagent (I) into the poly,-u~ vLide chain will contain a selectably cleavable site. Probes containing cleavable sites are particularly useful in the hyu,; i;LdliVII assay described in commonly assigned U.S. Patent No. 5,118,605 to Urdea et al., entitled 'Tuly..~l~,lcvL;de Determination with Selectable Cieavage Sites~" the disclosure of which is 10 ~ I,u-dLtvhereinbyreference, Thenatureofthecleavablesitemayvary,butwilltypically involve a linkage that may be cleaved using readily available chemical reagents, the only iimitation here being that the cleavage reagents are compatible with the various probes~
labels, etc., used in the remainder of the method. Generally, the cleavable site will be present in the moiety "Z" present within the R5 substituent in the formulae. Preferred cleavable sites arethoseidentifiedinU,S.PatentNo 5,118,605. Asexplainedinthatapplication,selectably cleavable sites include, for example, the ~;ullnwillg types of linkages:
O O
C ~ CH2 CH2 ~ (hydroxyla3nine-sensitive);
2û -C-NH- (b~se-sensitive);
O
-S- ( base-sens itive );
_5_5 _ ( thio1- s ens itive ); and Ol H Ol H
-CH--CH- ( periodate-sens itive ) .
N-hy h UAy ' ~ ' ~ (NHS) may be used to introduce the base-cleavable amide 30 bond into the reagent, while ethylene glycol bis(~ ~ ~ ~ 'yl succinate) may be used to create a hydroxyl~ , sen iitive linkage. bis[2-~ ' ~ yudl bùl~.~luAy)ethyl]sulfone (BSOCOES) may be used to create a ba~-sensitive sulfone linkage, ~ lyl tartarate 1 9 6 8 0 6 r, ~
~ WO 96/06104 P~ u / /6 (DST) may be used to introduce 1,2-diols cleavable by periodate, and dithiobis-~ 1~ ip, u~;~,.,atc) (DSP) may be used to provide thiol-cleavable disulfide bonds.
Methods of using these reagents to produce the desired cleavable linkage are well known and will be readily apparent to those skilled in the art of synthetic organic chemistry.
In the ar.,.c.. ,~.. ;u"cd ~ ~I.o~ , the moiety R9 represents a detectable label, such that cleavage of a linkage present within the spacer moiety Z will result in release of label .
Suitable labels which may be present at the R9 position in such a case include, for example, iu~ 4 ~, fluorescers, ' ' Imi~ srers~ dyes, enzymes, enzyme substrates, enzyme cofactors, enzyme inhibitors, enzyme subunits, metal ions, and the like. Illustrative specific 10 labels include fluorescein, rhodamine, Texas red, phycoerythrin, u".l,.llif~ , luminol, NADPH, a,b-~llr~iu~id~ .c, horseradish peroxidase, and the like.
Polynucleotide reagents useful as probes in hybridization assays may also be prepared by using the monomenc reagent (I) as a "branch poinl." In this way, probes containing branch points having the structural formula (V) - Ho r ~ Ai ~- ~ ~ P--~ ~ , ~, ,~ A ~ A ~ l-- G l~
O
1 ,5, ~
~r~--P--~-- ~ ~~11 o (V) wo96/06104 '1,~9 20- r~ lL ~/6 may be prepared, wherein DNA" DNA2, DNA3, R3, R4 and Rs are as defined above. Such 5 probes may be used, for example, in the ~ assays described in commoniy assigned U.S. Patent No. 5,124,246 to Urdea et al., entitied "Nucleic Acid Multimers and Amplified Nucleic Acid IIyblkl;~d~ivll Assays Using Same," PCT Publication Nos. W089/03891, and WO 92/02526. The latter application describes the comb-type branched multimers which are preferred in conjunction with the present method, and which are composed of a linear backbone and pendant sidechains; the backbone includes a segment that provides a specific hyl)li il~d~;UII site for anaiyte nucleic acid or nucleic acid bound to the analyte, whereas the pendant sidechains inciude iterations of a segment that provide specific Lrul;J;LdL;ull sites for a labeled probe.
In still another ~i.,Lo ihll~lL of the invention, the "abasic," or modified, site provided by monomeric reagent (I) may be used to enable synthesis of a ~ol~ .L.vliJu on a solid support. In this case, the reagent is bound to a solid support through the iinker arm at the I
position, i e., R9 represents a soiid support. As noted above, the linicage to the solid support may aiso be at the 3 position, at Rl Examples of solid supports include silica, Porasil C, polystyrene, controlled pore glass (CPG), kieselguhr, POIY(I~ GWYIG~Uid~
POIY(G~ llllUll ' ' ' ), polystyrene grafted onto pul.~ Lldlluulv~,Jl~ ;), cellulose, Sephadex LH-20 and Fractûsil 500. Nucleûtidic mûnomers are then added using standard DNA synthesis chemistry at the 3' and 5' positions. In some cases, i.e., to produce support-bound labeiied probes, it may be desirable to replace some nucleotidic monomers with labeiied monomers, e.g., the NJ-labelled cytidine derivatives described in commonly assigned U.S. Patent No. 5,093,232 to Urdea et al., entitled "Nucleic Acid Probes." Such monomers have the structurai formula (Vl) 2Ig680~ ' ~ WO96/06104 -21- r~ 1UI/6 R'~
R
(Vl) (~
1~
1 0 o~ ~ ~
~1~~o ~
OR
wherein R~ and Rl are as defined above;
R" is an optional linking moiety which, if present, contains an an~ide, thioether or disulfide linkage or a ~ .s,~ ;.." thereof;
2 o Rl2 is a reactive group d~,.iv~.Li~l,l,, with a detectable label, e.g., -NH~, -COOH or -SH;
R'3 is hydrogen, methyl, fluoro, bromo or iodo; and R'~ is either hydrogen, hydroxyl or protected hydroxyl.
In still another F~ .O- I : of the invention, I~UI ~ul,h,v~id~,3 are synthesized in which 25 themonomericreagent(I)maybeusedtochangethedirectionofsynthesis~e~g~from3~ 15'to 5' ~3' or vice versa. This is O ~ l by adding monomeric reagent (I) to the terminusofagrowingv~ vl;~lFchain~cappingeitherthe3~ors~terminalhydroxyl group with a capping group, typicaily an acyl capping group, and then using the l linker arm to continue synthesis in the reverse direction. Oligomers in which adjacent monomer units 3 0 are linked 3'-3' can also be prepared using reagent (I), by binding the ~ ;. IF to a solid support at R9, growing a single oligomer at the 5' position, capping exposed the WO 96106104 ~ 22 ~ J.,,J~ 6 group at the 5' terminus, and then growing a second oligomer at the 3' position. Such structures are illustrated in formulae (Il) and (III).
Synthetic Methods:
Scheme I illustrates the preferred method of ~yllLi. ,~;Lhlg monomeric reagents having the structural formula (1):
~ WO96/061~4 21968D6 p "~ o Scheme I
10 ~7~
o ' ~ ~
0~
9.' 1' ~ -~ ~
~r O7~ ~ v o ~ ¢7\~
o 1~ 7 S ,~ ~ 0 o ~5 , 30 ~s ~ X .1 ~!
o~
WO 96/06104 ?,~ 6 ~ / L l l6 In Scheme 1, 2-deoxy-D-, ;~ is used as the starting material. The three hydroxyl groups of the molecule are protected using an "R-CI" reagent or some other reagent suitable to protect free hydroxyl groups (e.g., benzoyl chloride or acetic anhydride) to provide 3 -OR groups at the I, 3 and 5 positions of the sugar. The product is isolated, and the l-OR group then replaced by reaction with a moiety (R9)~-X-~AH in the presence of an acid catalyst, followed by d.,~., uLeuL;on at the 3 and 5 positions using base. The S
position may then be selectively protected by reaction with Rl-CI, e.g., d;~ dlu~yLlilyl chloride, followed by reaction with a selected pl~ P at the 3 position to provide the desired phosphorus derivative.
The practice of the present invention will employ, unless otherwise indicated, ~,un~L;ull,~l techniques of synthetic organic chemistry, bio~,h~ L.y, molecular biology, and the like, which are within the skill of the art. Such techniques are explained fully in the literature. See, e.g., Sambrook, Fritsch & Maniatis, Molecular Clonin~ A J ol~nratnrv ~5~, Second Edition (1989); O8y~ ;de Svnthesis (M.J. Gait, ed., 1984), ~ç~ç~
Acid Ilvl ,. ;~ 1 (B.D. ~amcs & S.J. Higgins, eds.~ 1984); and a series, Methods in EI~YIIIOIUYY (Academic Press, Inc:). All patents, patent ~ , and I ' ' mentioned herein, both supra and i~u'ra, are hereby i~ ul~Jul~Ltd by reference.
2 0 It is to be understood that while the invention has been described in conjunction with the preferred specific ' ' thereof, that the description above as well as the exarnple which follows are intended to illustrate arLd not limit the scope of the invention. Other aspects, advantages and ,..n.l;i~ within the scope ofthe invention will be apparent to those skilled in the art to which the invention pertains.
In the following example, efforts have been made to insure accuracy with respect to numbers used (e.g., amounts, Ltl..~ LU.l:, etc.) but some c l~ ; ..;~1 error and deviation should be accounted for. Unless indicated otherwise, LtllllJ.,l~Lul~ is in degrees C and pressure is at or near ,a~ 8 2l968~6 .' ~',, ' ' ~ P~ 1 16 Exam~le I
1,3,5-Tris-O-acyl-2-deoxy-D-,;i,uru,~,lu~c was readily synthesized by treating CU~ILI.~ Y available 2-deoxy-D-. ;1,. ,~: " .., ~. .~ with a large excess of acetic anhydride or benzoyl chloride in pyridine. Both 1,3,5-O-trisacetyi- and trisbenzoyl-2-deoxy-5 D-,;i,uru"..oaG couid be ~ G~l y ' "' ~ firom ethanol. The acetyl derivative was mainiy the aipha-isomer, and the benzoyl derivative gave the two isomers in 1/1 ratio. No pyrancside derivative was formed ( less than 5% ).
1,3,5-O-tris(TBDMS)-2'-deoxy-D-, ;1 ", ~ 5itlr- was synthesized from ieU~Lyl ;iJo:~G by reaction with t-buLyl ihl.~..llybil~l ~,1 iu,;dc';"..d, ~JIc/DMF.
The anomeric acetai was readily exchanged with an alcohol in the presence of an acid catalyst, such as ZnBr2, to give the alcohol derivative of either 3,5-0-diacyl- or 3,5-O- di-TBDMS -2'-deoxy-, ;1 " ,1; ", ~f Removal of the 3,5-O-protecting groups with base (methanoi/lM K2CO3 for acyi) or fluoride ions (IM LGLI.LI,UIYI~"U,-U....I-., fluoride in THF
for TBDMS) gave the substituted 2'-deoxy- ~;burul~ uac derivatives.
Aicoholscontainingvarious li, li.~ ; havebeen;.. ~,u,pu,dltdthisway.
R~,yl~"c~t~L;vG examples are 4-1ll~,.~.ylu~y-".-lJu--yllJ.,.~yl, 4-1ut~uyll~.l..,Lllyl~
TFA-NH-alicyl(aryl), and N-(4~u~ ub~ Iu~y~;~uul~yl)/
~;~IOC-6-aminohexyl. They were aii prepared directly from the CUIlGyUlld;ll~; alcohol and 1,3,5-tri-0-acyl-2'-deoxy-D-,ii,uru..l,,uaG.
2 0 Preparation of S-trityl- I l-mercapto- I-undecyl was achieved via the 11 -bromo-l-undecyl derivative: After preparation of the 11 -bromo- I -undecyl 3,5-di-O-acetyl-2-deoxy-D-,ii,uL~l~u,uaG reaction with ~iLyh~,.l , (Tr-SH) in the presence of base (one equivaient of aq. NaOH ) afforded S-trityl- 11-u~ yLuulld~,~.yl 2-deoxy-D-.;l,~ r~ Aiternatively, S-Tr-ll-mercapto-l-undecanol could be prepared and used as the aicohol component. Aiternatively, it is possible to incorporate aicohols containing a disulfite, -S-S-. The O-levuiinyl-l l-oxo-undecyl derivative was prepared via the 11 -bromo derivative. After removai of the acetyl ~roups, of bromine with the Cs-salt of levulinic acid afforded O-levulinyl-l l -oxy-undecyl 2-deoxy-D-,ii,, ~ ~ Aiternatively, preformed O-levulinyl-l l-oxy-l-undecanol 3 0 could be used as the alcohol component.
The appropriate alicyl 2-deoxy-D-~ il,uru- a"uaidG analogs were converted to theS-DMT derivatives using stamdard literature procedures. The two anomeric aklGu;Su..._l a ,, . .. . ...... ... . _ WO 96/06104 ?~ 26 P~ 16 gave rise to DMT species with quite different mobilities during silica gel clll~ " . ', .
All DMT ' were purified by silica gel ~,LI ulllaLu~ lly, and the two anomeric ~Lcl CU;~UIII~ were readily separated. The various DMT ;"~ were converted to the 3-0-N,N-d;;~u~luuyl~.yGIlu~,;llyl-~ lln~ using standard literature procedures, and they could be used like normal nucleoside uy.-llu~ yl~ during automated synthesis.
Removal of protecting groups from chemically synthesized 1;". ~ ul; '~ ~ required only minimal changes to the standard procedures.
~ ..,.,,h~ !u~y~,albu~l ~ lu~l~yl 2-deoxy-D-~ u~ Hydrolysis of methyl ester and succinate linkage to support was carried out with water/TEA/dioxane (I :1:10 v/v; 13 hours) prior to exposure to ammonium hydroxide.
TFA/FMOC-NH-alkyl required only standard deprotection with ammonium hydroxide. For 4-1l;LIu~L~ ;llyl and N-(4--~ ub.,.l~lu~y-carbonyl)-6-~lli-lùli~yl.
reduction of the nitro group to an anilino group was conducted with 0.1 M sodium15 dithionitellM TEAB/ dioxane for S hours, washed, and then deprotected with ammonium hydroxide to give the free anilino- and amino derivatized oligomer, l~ ,.,Li~ , which was purified by PAGE.
On support treatment with HPAA reagent, the DNA synthesis can be continued on the same support to produce branched oligomers. With proper choice of side-arm length, 2 0 the monomer is usefiul for making 3'-3' linked oli~,uu~ uLid~ for cross-over triple helix formation. An exarnple is O-levulinyl-2-oxyethyl S-DMT-0-2-deoxy-D-, il ,. .ll .. ~
3'-O-succ-CPG; the first strand is synthesized using 5'-DMT, capped, the levulinyl group removed and synthesis continued at the 2-h~d~u~ ;h~l side-chain. Deprotection gives the desired 5'-DNAI-3'3'-DNA2-5' oligomer.
Thus, in addition to utility in providing cleavable sites wjthin, 'i~ ' ' or l)ul~..u~ ,v~ide chains, the invention enables a number of procedures deriving from the presence of linker arms at the I position of a monomeric dcv~yl ib~/a~. unit rather than purine or pyrimidine bases as present in cu~ liu~ nucleotide structures.
2 0 Overview of thP Art Backgrûund references which relate generally to methods for bylllh~;~
.,1;5 """ l~vl~' include those related to 5'-to-3' syntheses based on the use of,B-cyanoethyl phosphate protecting groups, e.g., de Napoli et al., Gazz Chim rt~l 114:65 (1984), Rosenthal et aL, Tetrrhp~rûn T .PttPrS 24: 1691 (1983),1Belagaje and Brush, Nucleic ~ri~lc F PCP~rrh 10:6295 (1977), in references which describe solution-phase 5'-to-3' syntheses include Hayatsu and Khorana, J American ~'hPmir~l Society 89:3880 (1957), Gait amd Sheppard, ~llrlPir Aririe RP~P~rrh 4 1135 (1977), Cramer and Koster, Aneew ('hPm Int E.l Fn~d _:473 (1968), and Blackbum et al., Journal ofthe Chemical Society, Part C, 2438 (1967).
In addition to the above-cited art, Matteucci and Caruthers, J. AmPrir~n ~hP.n;. ~1 Society 103:3185-3191 (1981), describe the use of ~ .h. ~ in the preparation of r~ 1 vl; !~ ~ Beaucage and Caruthers, Tetrahedron Letters;~:1859-1862 (1981), and U S Patent No 4~415~732 describe the use of l l ~ in the preparation of . _, .. , ., .. , .. . _ , _ , , 2~96806 '~ r s ~ WO96/06104 3 PCT/US95/10776 . vL; !r~ Smith, ABL 15-24 (December 1983), describes automated solid-phase o:;gvJ~v~yl il ;-, ,. .1, . .~h;P synthesis. See also the references cited therein, and Warner et al., DNA 3 :401411 (1984), whose disclosure is h~,u~5~u~ J herein by reference.
U.S. Patent Nos. 4,483,964 and 4,517,338 to Urdea et al. describes a method for S ~y..~h.,~ g pol~"...,l~,vfid~,s by selectively introducing reagents to a solid phase substrate in a tubular reaction zone. U.S. Patent No. 4,910,300 to Horn et al. also describes a method for ~y~lih.,~ g rl;r","." If . ,I;s~ - by sequentially adding nucleotidic monomers to a growing chain, but involves the in~ùl ~u~ ~L;ull of labelled, N-4 modified cytosine residues at ~-~d~ ... J, spaced apart positions. U.S. Patent No. 5,256,549 to Horn et al. is also of 1 û interest in that a method for preparing .~ f vl;: - is provided which involves a -6. .,. technique, i.e., in which the desired ,~ . ,"",.1. v~ is essentially synthesized and "purified" ~ f. ~ ly~ such that the final product is produced in ~ , pure form.
HomandUrdea,DNA5(5):421-425(1986),describe~uhv~vhvlyl~Liullofsolid-15 supported DNA fragments using bis(~ ..u~il.w~y)-N,N-diisopropyl ,t ~ See also, Horn and Urdea, Tetrahedron T PtfPr~ 27:47054708 (1986).
References which relate to hybl;J;~L;ùn techniques in general include the following:
Meinkoth and Wahl, Anal. Biol '...,. ny 138:267-284 (1984), provide an excellent review of hys,l;J;~L;u~ techniques. Leary et al., Proc. Natl. Ar Irl Sci. ~fUSA) 80:4045-4049 (1983) 2 0 describe the use of biotinylated DNA in conjunction with an avidin-enzyme conjugate for detectionofspecifico!;,~v,,lcl~.vL;Jesequences. R~nkietal.,Gene21:77-85,describewhat they refer to as a "sandwich" hylJI;J;~L;ull for detection of, .I;g. ,~ sequences.
Pfeuffer and Helmrich, J. Biol. Chem. ~:867-876 (1975), describe the coupling ofguanosine-5'-0-(3-i'i . ' - . ' ) to Sepharose 4B. Bauman et al., J. Hi~fr r hPm ~n~
Cvtochem 29:227-237, describe the 3'-labeling of RNA with fluorescers. PCT Application 7 describes the addition to DNA fragments of modified l;b.. If vl ;. l. for labeGng and methods for analyzing such DNA fragments. Renz and Kurz, Nucl. Ari~c Rr~
12:3435-3444, describe the covalent linking of enzymes to u~ ; ' - Wallace, DNA
R~ ~ T~ Woo, S., ed.) CRC Press, Boca Raton, Florida, provides a 3 0 general background of the use of probes in diagnosis. Chou and Merigan, N. ~;n,p J of ~L 308 921-925, describe the use of a ~ JI~5~e-labeled probe for the detection of CMV. Lnm3r~ M,-fhr,l~ in Fn7vmol 34B, 24:77-102 (1974), describes procedures for Wos6/06io4 &~S6 ~ //6 linking to poly~,.,.yhu~l;d~,." while Parikh et al., Methods in Enzymol. 34B, 24:77-102 (1974) describe coupling reactions with agarose. Aiwine et al., Proc. Natl. Acad. Sci. (USA) 74:5350-5354 (1977), describe a method of transferring .~ from gels to a solid support for hyblici;LGl;ull. Chu et al., Proc. Natl. Acad. Sci. (USA) 11 :6513-6529, describe a technique for derivatizing temlinal nucleotides. Ho et ai., F~ . .h. . . ,;~l ~y 20:64-67 (1981), describe derivatizing temlinal nucleotides through phosphate to fomm esters. Ashiey and MacDonaid, Anai. Bionh~m 140.95-103 (1984), report a method for preparing probes from a surface-bound template.
Home and Dervan, J. Am. Chem. Soc I i2:2435-2437 (1990), and Froehier et ai., Bi(lrh~mi~hv 31: 1603- 1 ~)9 (1992), relate to . .1;.~ r vl ;- Ie-directed triple helix formation.
Summarv of the Inv~ nti~ln in one aspect of the invention, then7 monomeric reagents useful for providing the 15 novel polyllu~levL;de structures are provided, the monomeric reagents having the structural fommula (I) ~ R4 ~ ~Rs wherein:
R' is selected from the group consisting of hydrogen, acid-sensitive, base-stable protecting groups and acyl capping groups;
R2 is a phosphorus derivative selected to enable addition of the reagent to a 30 molecular species containing a free hydroxyl group, or is a linkage to a solid support;
R3 is selected from the group consisting of hydrogen, hydroxyl, sulfhydryl, halogeno, amino, aikyl, allyl~ oR6 wherein R6 is alkyl, allyl, silyl or phosphate;
~ WO96/06104 19680~ s ' r~ 6 R4 is either hydro~en or -(CH2)mOR7 wherein R' is alicyl or -(Co)R5, R5 is alL-yl, and m is an integer in the range of 0 to 12 inclusive;
Rs is ~A~Z~X(R9)n;
A is oxygen, sulfur or methylene;
~ 5 Z is arylene, C6-C,5 aralicylene or C~-C~z alkylene containing 0 to 6 I.~,Ltlu~.Lu,.. .
selected from the group consisting of O, S, N, Si and Se and 0 to 6 linL-ages selected from the group consisting of -CO-,-COO-, -CONH-, -NHCO-, -S-S-, -SOz-, -CH(OH)-CH(OH)-, -CH(oR4)-CH(oR4)-, -O-PO(O~-O-, -o-Po(R4)-,-o-Po(oR4)-o-7 -o-Po(oR4)-R5- and -Po(oR4)-o-R5- in which R4 is lower aiLyl and R5 is lower alLylene, and, if Z is aralLylene or 10 allylene, containing 0 to 3 unsaturated bonds;
X is selected from the group consisting of-NH-, -CONH-, -NHCO-, -CO-, -S- and -SiE;
R9 is hydrogen, a protecting group, a detectable label, or, uniess X is _SjE, a solid support; and n is I when X is -NH-, -CONH-, -NHCO-, -CO-, or -S-, and is 3 when X is -Si=.
In another aspect, ~oir..,~ ,Li i~ reagents are provided having the structurai formulae (II), (III) or (IV) ~ ~lo ~ o--P--" ~ R
Rs . O R~
2 5 11 o--P--o-- ~ ~ to A 1--~
a r ~9~Q6 WO 96106104 - 6 - - - r~ O
s ~C--p_ ~ 4 (111) O~ R
5'- ~ c-&~o~ 4 ~1~ \~p~
(IV) ~ P-O -~ IDN~ ~S-C~
wherein DNA, represents a first segment of DNA DNA~ represents a second segment of DNA and R3, R~ and R5 are as defined above. In a related aspect of the invention, branched DNA is provided having the structural formula (V) WO96/06104 9680~ 7 r~l~u..,J,i l16 1~~ ~hlA~ ~- c - ~- O ~
~ CA ~ a l'l A ~ 1-- ~ l~
~ ~ lP o ~ o ~.~
10 wherein DNA,, DNA2 and DNA3 represent firso second and third segments of DNA, and R;, R', A and Z are as defined above.
In still other aspects of the invention, methods are provided for synthesizing pcl~ iJ~ containing abasic sites and for preparing branched DNA. These methods involve the ;-,~u- ~,u, 4L;UII of the above-mentioned monomeric reagent into larger 15 p~ ..u~,L,uL;de structures.
A method is also provided for detecting the presence of an ~I g- ~ u~ e sequenceof interest in a sample which involves hybridizing the nucleic acid sample with a pGlJ"~,leolide probe containing an abasic site as described herein, wherein the abasic site is formed from the monomeric reagent defined above, and fiurther wherein the reagent contains 2 0 a detectable label at R3 and a cleavable site within the linker moiety -Z-. Either the sample or the po .~ ,vLide probe is bound to a solid support, such that hybridization results in a label being bound to the support through the cleavable site. Following l,yb, ;.1;~4fio-" the cleavable site is cleaved with a suitable reagent so as to release the detectable label R3, and label which is free of the support is quantitated and correlated with the presence andlor quantity of 2 5 sample.
Additionally, probes synthesized using the compounds of the invention may contain 3'-3' linkages, as illustrated in structures (Ill) and (IV) above. Ol;6oue~J~.yllu~l~ul;ll~ probes containing 3'-3' linkages can be used in triple helix formation, i.e., as such probes can bind to opposite strands of duplex DNA.
WO96/06104 2~ 96~~6 - 8i - P~ /6 1 pPt~ i Descrivtion of the Invention Definitions and .~. ," .. ,1 l ". ,:
Before the present invention is disclosed and described in detail, it is to be understood that this invention is not iimited to specific assay formats, materials or reagents, 5 as such may, of course, vary. It is aiso to be understood that the i ~ vJ used herein is for the purpose of describing particular r ~1 ~0/~ oniy and is not intended to be limiting.
It must be noted that, as used in the ~ ;..,. amd the appended claims, the singular forms "a," "an" and "the" include plurai referents uniess the context clearly dictates otherwise. Thus, for example, reference to "a monomeric reagent" includes mixtures of 10 monomeric reagents, reference to "a pu4..l~,1evL;de probe" may include mixtures of different probes, reference to a po4..~1vlLvLiJc containing "an abasic site" includes l~u4~u~,lvvLi;lC~
containing two or more abasic sites, and the like.
In this ~ .", and in the claims which follow, reference will be made to a number of terms which shail be defined to have the following meanings:
As used herein, the terms "~u4.~ evLi ie'~ and ". 1~ " shail be generic to pcl~J~vAyl ;1~ L ..1;.5. ~ (containing 2-deoxy-D-ribose), to ~uly. ;1..., . 1 .1; 1. (containing D-ribose), to any other type of po4..v~ Iev~ide which is an N-giycoside of a purine or pyrimid;ne base, and to other polymers containing ~ backbones (e.g., protein nucleic acids and synthetic sequence-specific nucleic acid polymers vUIIIII~ available 2 0 from the Anti-Gene Development Group, Corvailis, Oregon, as NeugeneTM polymers), providing that the polymers contain .,. ,. 1~ ob ~-~ in a ~ 5v ~iun which ailows for base pairing and base stacking, such as is found in DNA and RNA. There is no intendeddistinction in length between the term "I,c~l~.lJ~ .vLi ic" and "~ , ' ' ," and these terms wiii be used i..a,l.,ik llvvdW~ . These terms refer oniy to the primary structure of the 25 molecule. Thus, these terms include double- and single-stranded DNA, as weii as double-and single-stranded RNA amd DNA:RNA hybrids, amd aiso include known types of , for example, labels which are known in the art, methylation, "caps,"
substitution of one or more ofthe naturaily occurring nucleotides with an anaiog, inter-nucleotide " .... ~ . 6... ,~ such as, for example, those with uncharged linkages (e.g., methyl 30 1,l,,.~l,l,,~,, lr~ 1s ~ n' .~ ,carbamates,etc.)andwithchargedlinkages (e.g.,, ' , ' , ' ~Lua~llvlvd;llliùaLca, etc.), those containing pendant moieties, such as, for exarnple, proteins ~mcluding nucleases, toxins, antibodies, signai 2l968a6 096/06~04 9 : r~ 3~ 6 peptides, poly-~lysine, etc.), those with u~lL~Lu~ (e.g., acridine, psoralen, etc.), those containing chelators (e.g., metals, radioactive metals, boron, oxidative metals, etc.), those ~ containing alkylators, those with modified linkages (e.g., alpha anomeric nucleic acids, etc.), as well as unmodified forms ofthe polyl~uclcv~;dc or nl;g.. ~ ! vil~lf The term ",uu~ u~ ,vLIc analyte" or ",uvlyllucl~vL;df~ sample" refers to a single- or double-stranded nucleic acid molecule which contains a target nucleotide sequence. The analyte nucleic acids may be from a variety of sources, e.g., biological fluids or solids, food stuflfs, cll~;lull~ ,...dl materials, etc., and may be prepared for the hylJl;di~ iUII analysis by a variety of means, e.g., proteinase K/SDS, chaotropic salts, or the like. The term 10 "~ulJ...~ v~;L analyte" is used hllclu;~ge.lbly herein with the terms "analyte," "analyte nucleic acid," "target" and "target molecule." As used herein, the term "target region" or "target nucleotide sequence'' refers to a probe binding region contained within the target molecule. The term "target sequence" refers to a sequence with which a probe will form a stable hybrid under desired conditions.
It will be appreciated that, as used herein, the terms "uu~,k,06;de" and "lluclevt;dc"
will include those moieties which contain not only the known purine and pyrimidine bases, but also other L~,t~,.ul,y~ bases which have been modified. Such ~ include methylated purines or uy ~ " , acylated purines or pyrimidines, or other h.,t~,l u~,y~
Modified nucleosides or nucleotides will also include ~ on the sugar moiety, e.g., 2 0 wherein one or more of the hydro~syl groups are replaced with halogen, aliphatic groups, or are ~ " ,. l ;. ", l . 1 as ethers, amines, or the like.
As used herein, the term "probe" refers to a structure comprised of a poly..u~,lwl dc, as defined above, which contains a nucleic acid sequence ~ . ' y to a nucleic acid sequence present in the target molecule. The pol y l~u~.L,vL;Ic regions of probes may be 25 composed of DNA, and/or RNA, and/or synthetic nucleotide analogs.
The terms "nucleic acid multimer" or " ~ multimer" are used herein to refer to a linear or branched polymer of the same repeating single-stranded ~ vl;~le unit or different srngle-stranded puly~.ull~,vL;de units, each of which contains a region where a label probe can bind, i.e., contains a nucleic acid sequence ~ u"~l~l l A y to a nucleic acid 30 sequence contained within a label probe; the ~ vl; l~ units may be composed of RNA, DNA, modified nucleotides or r.~ thereo~ At least one of the units has a sequence, length, and, .. ,. ,.~ that permits it to bind specifically to a segment of a target WO 96/06l04 ~ 10 A ~,~ /i~ / /6 poly.l..~ ,vL;de; typically, such units will contain ~ y 15 to 50, preferably 15 to 30, nucleotides, and will have a GC content in the range of about 20% to about 80%. The total number of ~ ,I g~ f units in the multimer will usually be in the range of about 3 to 1000, more Iypically in the range of about 10 to 100, and most typicaily about 50. In one S type of bramched muitimer three or more ul;g, - ~ units emanate from a point of origin to fomm a bramched structure. The point of origin may be amother nucleotide unit or a molecule to which at least three units can be covaiently bound. In another type, there is an e 'i~ ' le unit backbone with one or more pendamt o~ g. . I~v~units linked to branch points in the backbone. These latter-type multimers are "fork-like,"
"comb-like" or ' "fork-" and "comb-like" in structure, wherein "comb-like"
muitimers are pu' ~ clcvLid~,~ having a linear backbone with a muitiplicity of sidechains extending from the backbone. Typically, there will be at least two branch points in the mUltimer~ more preferably at least three, more preferably in the range of about 5 to 30, although in some ~" l o~ there may be more. The multimer may include one or more1~ - lPV~ ; segments (e.g., comprised of protein nucleic acids or synthetic sequence-specific nucleic acid polymers, as noted above with respect to "~uly~ .lev~id~,~" in general), and one or more segments of double-stranded sequences. Further infommation concerning multimer synthesis and specific muitimer structures may be found in commoniy assigned U.S.
Patent No. 5,124,246 to Urdea et al.
2 o As used herein, a "biologicai sample" refers to a sample of tissue or fluid isolated from an individual, including but not limited to, for example, plasma, serum, spinal luid, semen, Iymph fluid, the extemal sections of the skin, respiratory, intestinal, and g y tracts, tears, saliva, milk, blood cells, tumors, orgams, amd also samples of in vilro cell culture constituents (including but not limited to conditioned medium resulting from the growth of cells in cell culture medium, putatively viraily infected cells, I~,ul~b;llrlllL celis, and cell components). Preferred uses of the present method are in detecting and/or q ~ virai antigens, such as from hepatitis B virus ("HBV"), hepatitis C virus ("HCV"), hepatitis D
virus ("HDV"), human ;., .... ~d 1~..;.... y virus ("HIV"), and the herpes family of viruses, includmg herpes zoster (chicken pox), herpes simplex virus I & Il, r;yi v;' .:.u~, Epstein-3 0 Barr virus, and the recently isolated Herpes VI virus.
By "protecting group" as used herein is meamt a species which prevents a segment of a molecule from undergoing a specific chemical reaction, but which is removable from the ..... .. , . ..... ..... . , ...... _ . . .. . . _ .. . _ ... . . ... ... . . _ . . , ... _ _ 2196~o~
~ WO 96/061~ PCT/US9S/10776 molecule following completion of that reaction. This is in contrast to a "capping group,"
which " I!! binds to a segment of a molecule to prevent any further chemical r. ", . -~ , 1 of that segment.
By "abasic site," as noted above, is meant a monomeric unit contained within a puly~ ,le~ide chain but which does not contain a purine or pyrimidine base. The term is used hlle~ herein with "modified dc.)~.ylil~ose residue". That is, the monomericunits used in conjunction with the method of the invention contain the dc~ y~ ibos~ ring but do not have a purine or pyrimidine base present at the I position.
The term "alkyl" as used herein refers to a branched or unbranched saturated h~ Ub-)ll group of I to 24 carbon atoms, such as methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, t-butyl, octyl, decyl, tetradecyl, hexadecyl, eicosyl, tetracosyl and the like.
Preferred alkyl groups herein contain I to 12 carbon atoms. The term "lower alkyl" intends an alkyl group of one to six carbon atoms, preferably one to four carbon atoms.
The term "alkylene" as used herein refers to a bifunctional saturated branched or unbranched l-yJ~ ,G.l,o-- chain containing from I to 24 carbon atoms, and includes, for example, methylene (-CH2-), ethylene (-CH2-CH2-), propylene (-CH2-CH2-CH2-), 2-methyl-propylene [-CH2-CH(CH3)-CH2-], hexylene [-(CH2)6-] and the like. "Lower alkylene" refers to an alkylene group of I to 6, more preferably I to 4, carbon atoms.
The term "aryl" as used herein refers to an aromatic species containing 1 to S
aromatic rings, either ",.~.,1,~61,.t. J or substituted with I or more substituents typically selected from the group consisting of-(CH2)~-NH2, -(CH2),~-COOH, -NO2, halogen and lower alkyl, where x is an integer in the range of 0 to 6 inclusive as outlined above. The term "aralkyl" intends a moiety containing both alkyl and aryl species, typically containing less than about 24 carbon atoms, and more typically less than about 12 carbon atoms in the alkyl segment of the moiety, and typically containing I to 5 aromatic rings. The term "aralkyl"
will usually be used to refer to aryl-substituted aikyl groups. The term "~lkyl,.l.~" will be used in a similar manner to refer to moieties containing both alkylene at~d aryl species, typically containing less than about 24 carbon atoms in the alkylene portion and I to 5 aromatic rings in the aryl portion, and typically aryl-substituted alkylene.
3 0 The term "arylene" refers to a difunctional aromatic moiety; "Il~v~lu~ , arylene"
refers to a phenylene group. These groups may be substituted with up to four ring substi-tuents as outlined above.
- 2~ Q~
WO96/06104 - 12- .._11~)~,3J~_//6 "Optional" or "optionaliy" means that the ~ubal;~u.,.lLly described event or uil~.ulllaL~ may or may not occur, and that the description includes instances where said event or ~,;., occurs and instances where it does not. For example, the phrase "optionally substituted alkylene" means that an alicylene moiety may or may not be 5 substituted and that the description includes both ~ alicylene and alicylene where there is 5nhctitntinn The Monomeric Reagents of the Invention:
The monomeric compounds of the invention which are used to create abasic sites 10 within pul~..u~,le~)L;.ie structures have the formula (I) (I) . ~, OR R
with R~, R2, R3, A, Z, X and n as defined above. It may be seen that reagent (I) is composed 2 o of a de~J,Lyl ;i,ose ring, containing substituents Rl and R2 at the 5 and 3 positions, respectively, which enable ;~U~u~,L;ull ofthe reagent into a pulylluclc~)L;de chain using coll~ ullol chemical DNA synthesis techniques. The moiety -A-Z-X(R9)~ at the I position replaces the purine or pyrtrnidine base normally present in a nucleotidic structure, and, as may be deduced from the def nition of R9, may be an u..~.,uL~Lci moiety, a protected 2 5 moiety, a labeled moiety, or a linker which is bound to a solid support.
Rl is, as noted above, a base-stable, acid-sensitive blocicing group. Such blocking groups are well-known in the art of..~ f synthesis and include u. ~ ~h~l;l..lr~ or substituted aryl or aralkyl groups, where the aryl is, e.g., phenyl, naphthyl, furanyl, biphenyl, or the liice, and where the substituents are from û to 3, usually to û to 2, and include any 3 0 ~ - I'rl ;1 Ig stable groups, neutral or polar, electron-donating or w;Lhll~w;ug. Examples ofsuchgroupsare.~ ,uAyLl;Lyl(DMT)~ b~yLI;Lyl(MMT)~tritylandpixyL A
particularly preferred moiety for use herein is DMT.
2l968~6 '' , wo 96/06104 - 13 - - r~ ,.,sl.~776 R2 is a phosphoriis derivative which is selècted so as to facilitate .,, 1 -0.~., of the reagent with the 5'-hydroxyl group of a nucleoside or an ~ IP chain. Such groups include I ' . ' ' ~ Jhù~iJhv~l k~s~ 7 pl~ , phosphites, H-~iJhuDiJllulull~oat~,~, and the like (see, e.g., EP Publication No. 0225807 by Urdea et al., 5 "Solution Phase Nucleic Acid Sandwich Assay and Poly"u~,L,uli(ie Probes Useful Therein,"
the disclosure of which is hl~,uliJul~lLr~d by reference herein.) Particularly preferred groups useful as R2 are iJhOaiJllul~L~IuJilt:~ having the structure:
N(iPr)~
1 0 _p~
O--Y
wherein Y is selected from the group consisîing of methyl and ~-cyanoethyl, and "iPr"
represents isopropyl. Most preferably, Y is ~3-cyanoethyl.
Aiternatively, R2 may be a linicage to a solid support, typically through a carbonyl moiety. That is, R2 may be -(CO)-RIc wherein Rl~ represents the solid support.
As noted above, the Rl and RZ substituents are generally selected so as to ailow;n~UI iJUI .l~;UII of the monomeric reagent (I) into a DNA fragment using standard r, chemistry protocols, well icnown in the art, and described, for example, in a2 0 number of the references cited hereinabove. In general, to incorporate the monomeric reagent (I) into a poly"u~ ide chain, the RZ substituent is selected so as enable reaction of the reagent at that position (i.e., the 3 position) with the 5'-hydroxyl group of a nucleoside or an ol ~ " 1 ul ;rl~ chain, while the Rl moiety is selected so as to enable reaction of the reagent at that position (i.e., the 5 position) with the 3'-hydroxyl of a nucleoside or an 25 ..li",.",.. 1. ~.~j.le chain.
Examples of preferred monomeric reagents r ~ L ~ d by structural formula (I) include the foiiowing:
WO96/06104 ~.96~~ .3,l "6 ~
--~R2 0-- --O' Z~ COCP3 R O
oR2 Z--N~
oR2 2l96Bo6 R/O~ NO z R10 O~S--S O~ 0 oR2 , S~
R10_~0 ~
oR2 .
R10 ~S--S ,~
-~ O
oR2 WO96/06104 Qo~6 r~ JU"6 ~,~9 1 6 -O
R10_, O~ ~ O--P--O-~ CH3 OH
oR2 ~lo O~s~
-~
R~O o~Si(CH3)3 ~Y
2s oR2 3 o O
~lo~ ~J ~C~H
3 5 oR2 2l968o6 ~ WO96/06104 17 PCT/US95/10776 S~O--~ t--RIO_~O~
RIO_~o~O~NH--CPG
oR2 Pul.yll..clcJL;;ie Reagents Containing Abasic Sites:
The ~-u'~ .-uclculide reagents of the invention which contain abasic sites are prepared using standard DNA synthesis chemistry and replacing a fraction of the nucleotidic monomers with n~ reagent (1). Generally, c~ w~ l.y I to 100% ofthe monomers used to synthesize the polynucleotide reagent will be replaced with reagent (1), more preferabiy 10 to 50~/0. and most preferably 20 to 40~/0 Generally, about 0 to 10 bases will be h~ul~ù~ e~l between n.~ r ~ n ~ monomer units. It is preferred, particularly when the R9 group is a large, bulky substituent, that the n~ t~ ' monomers (I) be spaced apart within the IJulyllu11.,vL;de chain. In such a case, at least about 3 bases should be ir.~u. ~)u. ~:Le i between monomer units to minimize steric interference or d ~ ~ -These pulr.~uuieuL;de reagents will generally have the structurai formuiae (Il), (111) or (IV) as shown above.
The polynucleotide reagents of the invention may be used as probes in a wide variety of hybridization assays such as those described in commonly assigned U.S. Patent Nos.
4,775,619 to Urdea et al., 4,868,105 to Horn et al., 5, i 18,605 to Urdea, 5, I Z4,246 to Urdea WO96/06104 ?~96~L6 - 18 - P~ 't~ 6 et al., 5,200,314 to Urdea~ as well as in PCT Publication Nos. 89/03891 (inventors Urdea et al.) and 92/22671 (inventors Horn et al.). Additionally, with respect to structures (Ill) and (IV), it shouid be noted that a 3'-3' linkage is provided, enabling use ofthe probes in triple helix formation.
In some cases, the linker arm present in n~ - - " ;~ monomer units resulting from ;n~ul~JuldLiUl~ of reagent (I) into the poly,-u~ vLide chain will contain a selectably cleavable site. Probes containing cleavable sites are particularly useful in the hyu,; i;LdliVII assay described in commonly assigned U.S. Patent No. 5,118,605 to Urdea et al., entitled 'Tuly..~l~,lcvL;de Determination with Selectable Cieavage Sites~" the disclosure of which is 10 ~ I,u-dLtvhereinbyreference, Thenatureofthecleavablesitemayvary,butwilltypically involve a linkage that may be cleaved using readily available chemical reagents, the only iimitation here being that the cleavage reagents are compatible with the various probes~
labels, etc., used in the remainder of the method. Generally, the cleavable site will be present in the moiety "Z" present within the R5 substituent in the formulae. Preferred cleavable sites arethoseidentifiedinU,S.PatentNo 5,118,605. Asexplainedinthatapplication,selectably cleavable sites include, for example, the ~;ullnwillg types of linkages:
O O
C ~ CH2 CH2 ~ (hydroxyla3nine-sensitive);
2û -C-NH- (b~se-sensitive);
O
-S- ( base-sens itive );
_5_5 _ ( thio1- s ens itive ); and Ol H Ol H
-CH--CH- ( periodate-sens itive ) .
N-hy h UAy ' ~ ' ~ (NHS) may be used to introduce the base-cleavable amide 30 bond into the reagent, while ethylene glycol bis(~ ~ ~ ~ 'yl succinate) may be used to create a hydroxyl~ , sen iitive linkage. bis[2-~ ' ~ yudl bùl~.~luAy)ethyl]sulfone (BSOCOES) may be used to create a ba~-sensitive sulfone linkage, ~ lyl tartarate 1 9 6 8 0 6 r, ~
~ WO 96/06104 P~ u / /6 (DST) may be used to introduce 1,2-diols cleavable by periodate, and dithiobis-~ 1~ ip, u~;~,.,atc) (DSP) may be used to provide thiol-cleavable disulfide bonds.
Methods of using these reagents to produce the desired cleavable linkage are well known and will be readily apparent to those skilled in the art of synthetic organic chemistry.
In the ar.,.c.. ,~.. ;u"cd ~ ~I.o~ , the moiety R9 represents a detectable label, such that cleavage of a linkage present within the spacer moiety Z will result in release of label .
Suitable labels which may be present at the R9 position in such a case include, for example, iu~ 4 ~, fluorescers, ' ' Imi~ srers~ dyes, enzymes, enzyme substrates, enzyme cofactors, enzyme inhibitors, enzyme subunits, metal ions, and the like. Illustrative specific 10 labels include fluorescein, rhodamine, Texas red, phycoerythrin, u".l,.llif~ , luminol, NADPH, a,b-~llr~iu~id~ .c, horseradish peroxidase, and the like.
Polynucleotide reagents useful as probes in hybridization assays may also be prepared by using the monomenc reagent (I) as a "branch poinl." In this way, probes containing branch points having the structural formula (V) - Ho r ~ Ai ~- ~ ~ P--~ ~ , ~, ,~ A ~ A ~ l-- G l~
O
1 ,5, ~
~r~--P--~-- ~ ~~11 o (V) wo96/06104 '1,~9 20- r~ lL ~/6 may be prepared, wherein DNA" DNA2, DNA3, R3, R4 and Rs are as defined above. Such 5 probes may be used, for example, in the ~ assays described in commoniy assigned U.S. Patent No. 5,124,246 to Urdea et al., entitied "Nucleic Acid Multimers and Amplified Nucleic Acid IIyblkl;~d~ivll Assays Using Same," PCT Publication Nos. W089/03891, and WO 92/02526. The latter application describes the comb-type branched multimers which are preferred in conjunction with the present method, and which are composed of a linear backbone and pendant sidechains; the backbone includes a segment that provides a specific hyl)li il~d~;UII site for anaiyte nucleic acid or nucleic acid bound to the analyte, whereas the pendant sidechains inciude iterations of a segment that provide specific Lrul;J;LdL;ull sites for a labeled probe.
In still another ~i.,Lo ihll~lL of the invention, the "abasic," or modified, site provided by monomeric reagent (I) may be used to enable synthesis of a ~ol~ .L.vliJu on a solid support. In this case, the reagent is bound to a solid support through the iinker arm at the I
position, i e., R9 represents a soiid support. As noted above, the linicage to the solid support may aiso be at the 3 position, at Rl Examples of solid supports include silica, Porasil C, polystyrene, controlled pore glass (CPG), kieselguhr, POIY(I~ GWYIG~Uid~
POIY(G~ llllUll ' ' ' ), polystyrene grafted onto pul.~ Lldlluulv~,Jl~ ;), cellulose, Sephadex LH-20 and Fractûsil 500. Nucleûtidic mûnomers are then added using standard DNA synthesis chemistry at the 3' and 5' positions. In some cases, i.e., to produce support-bound labeiied probes, it may be desirable to replace some nucleotidic monomers with labeiied monomers, e.g., the NJ-labelled cytidine derivatives described in commonly assigned U.S. Patent No. 5,093,232 to Urdea et al., entitled "Nucleic Acid Probes." Such monomers have the structurai formula (Vl) 2Ig680~ ' ~ WO96/06104 -21- r~ 1UI/6 R'~
R
(Vl) (~
1~
1 0 o~ ~ ~
~1~~o ~
OR
wherein R~ and Rl are as defined above;
R" is an optional linking moiety which, if present, contains an an~ide, thioether or disulfide linkage or a ~ .s,~ ;.." thereof;
2 o Rl2 is a reactive group d~,.iv~.Li~l,l,, with a detectable label, e.g., -NH~, -COOH or -SH;
R'3 is hydrogen, methyl, fluoro, bromo or iodo; and R'~ is either hydrogen, hydroxyl or protected hydroxyl.
In still another F~ .O- I : of the invention, I~UI ~ul,h,v~id~,3 are synthesized in which 25 themonomericreagent(I)maybeusedtochangethedirectionofsynthesis~e~g~from3~ 15'to 5' ~3' or vice versa. This is O ~ l by adding monomeric reagent (I) to the terminusofagrowingv~ vl;~lFchain~cappingeitherthe3~ors~terminalhydroxyl group with a capping group, typicaily an acyl capping group, and then using the l linker arm to continue synthesis in the reverse direction. Oligomers in which adjacent monomer units 3 0 are linked 3'-3' can also be prepared using reagent (I), by binding the ~ ;. IF to a solid support at R9, growing a single oligomer at the 5' position, capping exposed the WO 96106104 ~ 22 ~ J.,,J~ 6 group at the 5' terminus, and then growing a second oligomer at the 3' position. Such structures are illustrated in formulae (Il) and (III).
Synthetic Methods:
Scheme I illustrates the preferred method of ~yllLi. ,~;Lhlg monomeric reagents having the structural formula (1):
~ WO96/061~4 21968D6 p "~ o Scheme I
10 ~7~
o ' ~ ~
0~
9.' 1' ~ -~ ~
~r O7~ ~ v o ~ ¢7\~
o 1~ 7 S ,~ ~ 0 o ~5 , 30 ~s ~ X .1 ~!
o~
WO 96/06104 ?,~ 6 ~ / L l l6 In Scheme 1, 2-deoxy-D-, ;~ is used as the starting material. The three hydroxyl groups of the molecule are protected using an "R-CI" reagent or some other reagent suitable to protect free hydroxyl groups (e.g., benzoyl chloride or acetic anhydride) to provide 3 -OR groups at the I, 3 and 5 positions of the sugar. The product is isolated, and the l-OR group then replaced by reaction with a moiety (R9)~-X-~AH in the presence of an acid catalyst, followed by d.,~., uLeuL;on at the 3 and 5 positions using base. The S
position may then be selectively protected by reaction with Rl-CI, e.g., d;~ dlu~yLlilyl chloride, followed by reaction with a selected pl~ P at the 3 position to provide the desired phosphorus derivative.
The practice of the present invention will employ, unless otherwise indicated, ~,un~L;ull,~l techniques of synthetic organic chemistry, bio~,h~ L.y, molecular biology, and the like, which are within the skill of the art. Such techniques are explained fully in the literature. See, e.g., Sambrook, Fritsch & Maniatis, Molecular Clonin~ A J ol~nratnrv ~5~, Second Edition (1989); O8y~ ;de Svnthesis (M.J. Gait, ed., 1984), ~ç~ç~
Acid Ilvl ,. ;~ 1 (B.D. ~amcs & S.J. Higgins, eds.~ 1984); and a series, Methods in EI~YIIIOIUYY (Academic Press, Inc:). All patents, patent ~ , and I ' ' mentioned herein, both supra and i~u'ra, are hereby i~ ul~Jul~Ltd by reference.
2 0 It is to be understood that while the invention has been described in conjunction with the preferred specific ' ' thereof, that the description above as well as the exarnple which follows are intended to illustrate arLd not limit the scope of the invention. Other aspects, advantages and ,..n.l;i~ within the scope ofthe invention will be apparent to those skilled in the art to which the invention pertains.
In the following example, efforts have been made to insure accuracy with respect to numbers used (e.g., amounts, Ltl..~ LU.l:, etc.) but some c l~ ; ..;~1 error and deviation should be accounted for. Unless indicated otherwise, LtllllJ.,l~Lul~ is in degrees C and pressure is at or near ,a~ 8 2l968~6 .' ~',, ' ' ~ P~ 1 16 Exam~le I
1,3,5-Tris-O-acyl-2-deoxy-D-,;i,uru,~,lu~c was readily synthesized by treating CU~ILI.~ Y available 2-deoxy-D-. ;1,. ,~: " .., ~. .~ with a large excess of acetic anhydride or benzoyl chloride in pyridine. Both 1,3,5-O-trisacetyi- and trisbenzoyl-2-deoxy-5 D-,;i,uru"..oaG couid be ~ G~l y ' "' ~ firom ethanol. The acetyl derivative was mainiy the aipha-isomer, and the benzoyl derivative gave the two isomers in 1/1 ratio. No pyrancside derivative was formed ( less than 5% ).
1,3,5-O-tris(TBDMS)-2'-deoxy-D-, ;1 ", ~ 5itlr- was synthesized from ieU~Lyl ;iJo:~G by reaction with t-buLyl ihl.~..llybil~l ~,1 iu,;dc';"..d, ~JIc/DMF.
The anomeric acetai was readily exchanged with an alcohol in the presence of an acid catalyst, such as ZnBr2, to give the alcohol derivative of either 3,5-0-diacyl- or 3,5-O- di-TBDMS -2'-deoxy-, ;1 " ,1; ", ~f Removal of the 3,5-O-protecting groups with base (methanoi/lM K2CO3 for acyi) or fluoride ions (IM LGLI.LI,UIYI~"U,-U....I-., fluoride in THF
for TBDMS) gave the substituted 2'-deoxy- ~;burul~ uac derivatives.
Aicoholscontainingvarious li, li.~ ; havebeen;.. ~,u,pu,dltdthisway.
R~,yl~"c~t~L;vG examples are 4-1ll~,.~.ylu~y-".-lJu--yllJ.,.~yl, 4-1ut~uyll~.l..,Lllyl~
TFA-NH-alicyl(aryl), and N-(4~u~ ub~ Iu~y~;~uul~yl)/
~;~IOC-6-aminohexyl. They were aii prepared directly from the CUIlGyUlld;ll~; alcohol and 1,3,5-tri-0-acyl-2'-deoxy-D-,ii,uru..l,,uaG.
2 0 Preparation of S-trityl- I l-mercapto- I-undecyl was achieved via the 11 -bromo-l-undecyl derivative: After preparation of the 11 -bromo- I -undecyl 3,5-di-O-acetyl-2-deoxy-D-,ii,uL~l~u,uaG reaction with ~iLyh~,.l , (Tr-SH) in the presence of base (one equivaient of aq. NaOH ) afforded S-trityl- 11-u~ yLuulld~,~.yl 2-deoxy-D-.;l,~ r~ Aiternatively, S-Tr-ll-mercapto-l-undecanol could be prepared and used as the aicohol component. Aiternatively, it is possible to incorporate aicohols containing a disulfite, -S-S-. The O-levuiinyl-l l-oxo-undecyl derivative was prepared via the 11 -bromo derivative. After removai of the acetyl ~roups, of bromine with the Cs-salt of levulinic acid afforded O-levulinyl-l l -oxy-undecyl 2-deoxy-D-,ii,, ~ ~ Aiternatively, preformed O-levulinyl-l l-oxy-l-undecanol 3 0 could be used as the alcohol component.
The appropriate alicyl 2-deoxy-D-~ il,uru- a"uaidG analogs were converted to theS-DMT derivatives using stamdard literature procedures. The two anomeric aklGu;Su..._l a ,, . .. . ...... ... . _ WO 96/06104 ?~ 26 P~ 16 gave rise to DMT species with quite different mobilities during silica gel clll~ " . ', .
All DMT ' were purified by silica gel ~,LI ulllaLu~ lly, and the two anomeric ~Lcl CU;~UIII~ were readily separated. The various DMT ;"~ were converted to the 3-0-N,N-d;;~u~luuyl~.yGIlu~,;llyl-~ lln~ using standard literature procedures, and they could be used like normal nucleoside uy.-llu~ yl~ during automated synthesis.
Removal of protecting groups from chemically synthesized 1;". ~ ul; '~ ~ required only minimal changes to the standard procedures.
~ ..,.,,h~ !u~y~,albu~l ~ lu~l~yl 2-deoxy-D-~ u~ Hydrolysis of methyl ester and succinate linkage to support was carried out with water/TEA/dioxane (I :1:10 v/v; 13 hours) prior to exposure to ammonium hydroxide.
TFA/FMOC-NH-alkyl required only standard deprotection with ammonium hydroxide. For 4-1l;LIu~L~ ;llyl and N-(4--~ ub.,.l~lu~y-carbonyl)-6-~lli-lùli~yl.
reduction of the nitro group to an anilino group was conducted with 0.1 M sodium15 dithionitellM TEAB/ dioxane for S hours, washed, and then deprotected with ammonium hydroxide to give the free anilino- and amino derivatized oligomer, l~ ,.,Li~ , which was purified by PAGE.
On support treatment with HPAA reagent, the DNA synthesis can be continued on the same support to produce branched oligomers. With proper choice of side-arm length, 2 0 the monomer is usefiul for making 3'-3' linked oli~,uu~ uLid~ for cross-over triple helix formation. An exarnple is O-levulinyl-2-oxyethyl S-DMT-0-2-deoxy-D-, il ,. .ll .. ~
3'-O-succ-CPG; the first strand is synthesized using 5'-DMT, capped, the levulinyl group removed and synthesis continued at the 2-h~d~u~ ;h~l side-chain. Deprotection gives the desired 5'-DNAI-3'3'-DNA2-5' oligomer.
Claims (11)
1. A reagent having the structural formula wherein:
R1 is selected from the group consisting of hydrogen, acid-sensitive, base-stable protecting groups and acyl capping groups;
R2 is a phosphorus derivative selected to enable addition of the reagent to a molecular species containing a free hydroxyl group, or is a linkage to a solid support;
R3 is selected from the group consisting of hydrogen, hydroxyl, sulfhydryl, halogeno, amino, alkyl, allyl, -OR6 wherein R6 is alkyl, allyl, silyl or phosphate;
R4 is either hydrogen or -(CH2)mOR7 wherein R7 is alkyl or -(CO)R8, R8 is alkyl, and m is an integer in the range of 0 to 12 inclusive;
R5 is -A-Z-X(R9)n;
A is oxygen, sulfur or methylene;
Z is arylene, C6-C18 aralkylene or C1-C12 alkylene containing 0 to 6 heteroatomsselected from the group consisting of O, S, N, Si and Se and 0 to 6 linkages selected from the group consisting of -CO-, -COO-, -CONH-, -NHCO-, -S-S-, -SO2-, -CH(OH)-CH(OH)-, -CH(OR4)-CH(OR4)-, -O-PO(O)-O-, -O-PO(R4)-, -O-PO(OR4)-O-, -O-PO(OR4)-R5- and -PO(OR4)-O-R5- in which R4 is lower alkyl and R5 is lower alkylene, and, if Z is aralkylene or alkylene, containing 0 to 3 unsaturated bonds;
X is selected from the group consisting of -NH-, -CONH-, -NHCO-, -CO-, -S- and -Si~;
R9 is hydrogen, a protecting group, a detectable label, or, unless X is -Si~, a solid support; and n is 1 when X is -NH-, -CONH-, -NHCO-, -CO-, or -S-, and is 3 when X is -Si~, with the proviso that if R2 represents a linkage to a solid support, R9 is hydrogen, a protecting group, or a detectable label.
R1 is selected from the group consisting of hydrogen, acid-sensitive, base-stable protecting groups and acyl capping groups;
R2 is a phosphorus derivative selected to enable addition of the reagent to a molecular species containing a free hydroxyl group, or is a linkage to a solid support;
R3 is selected from the group consisting of hydrogen, hydroxyl, sulfhydryl, halogeno, amino, alkyl, allyl, -OR6 wherein R6 is alkyl, allyl, silyl or phosphate;
R4 is either hydrogen or -(CH2)mOR7 wherein R7 is alkyl or -(CO)R8, R8 is alkyl, and m is an integer in the range of 0 to 12 inclusive;
R5 is -A-Z-X(R9)n;
A is oxygen, sulfur or methylene;
Z is arylene, C6-C18 aralkylene or C1-C12 alkylene containing 0 to 6 heteroatomsselected from the group consisting of O, S, N, Si and Se and 0 to 6 linkages selected from the group consisting of -CO-, -COO-, -CONH-, -NHCO-, -S-S-, -SO2-, -CH(OH)-CH(OH)-, -CH(OR4)-CH(OR4)-, -O-PO(O)-O-, -O-PO(R4)-, -O-PO(OR4)-O-, -O-PO(OR4)-R5- and -PO(OR4)-O-R5- in which R4 is lower alkyl and R5 is lower alkylene, and, if Z is aralkylene or alkylene, containing 0 to 3 unsaturated bonds;
X is selected from the group consisting of -NH-, -CONH-, -NHCO-, -CO-, -S- and -Si~;
R9 is hydrogen, a protecting group, a detectable label, or, unless X is -Si~, a solid support; and n is 1 when X is -NH-, -CONH-, -NHCO-, -CO-, or -S-, and is 3 when X is -Si~, with the proviso that if R2 represents a linkage to a solid support, R9 is hydrogen, a protecting group, or a detectable label.
2. The reagent of claim 1, wherein A is oxygen.
3. The reagent of claim 2, wherein R9 is trityl.
4. The reagent of claim 2, wherein R9 is a label.
5. A reagent having the structural formula wherein:
R1 is selected from the group consisting of hydrogen and acid-sensitive, base-stable protecting groups;
R2 is is selected from the group consisting of phosphoramidites, phosphotriesters, phosphodiesters, phosphites, H-phosphonates and phosphorothioates;
A is oxygen, sulfur or methylene;
Z is a hydrocarbyl or oxyhydrocarbyl spacer moiety containing 1 to 18 carbon atoms and 0 to 6 oxygen atoms;
X is selected from the group consisting of -NH- and -S-; and R9 is a protecting group.
R1 is selected from the group consisting of hydrogen and acid-sensitive, base-stable protecting groups;
R2 is is selected from the group consisting of phosphoramidites, phosphotriesters, phosphodiesters, phosphites, H-phosphonates and phosphorothioates;
A is oxygen, sulfur or methylene;
Z is a hydrocarbyl or oxyhydrocarbyl spacer moiety containing 1 to 18 carbon atoms and 0 to 6 oxygen atoms;
X is selected from the group consisting of -NH- and -S-; and R9 is a protecting group.
6. A polynucleotide reagent having the structural formula wherein:
DNA1 is a first segment of DNA;
DNA2 is a second segment of DNA;
R3 is selected from the group consisting of hydrogen, hydroxyl, sulfhydryl, halogeno, amino, alkyl, allyl, OR6 wherein R6 is alkyl, allyl, silyl or phosphate;
R4 is either hydrogen or -(CH2)mOR7 wherein R7 is alkyl or -(CO)R8, R8 is alkyl, and m is an integer in the range of 0 to 12 inclusive;
R5 is -A-Z-X(R9)n;
A is oxygen, sulfur or methylene;
Z is arylene, C6-C18 aralkylene or C1-C12 alkylene containing 0 to heteroatoms selected from the group consisting of O, S, N,Si and Se and 0 to 6 linkages selected from the group consisting of-CO-, -COO-, -CONH-, -NHCO-, -S-S-, -SO2-, -CH(OH)-CH(OH)-, -CH(OR4)-CH(OR4)-, -O-PO(O)-O-, -O-PO(R4)-, -O-PO(OR4)-O-, -O-PO(OR4)-R5- and -PO(OR4)-O-R5- in which R4 is lower alkyl and R5 is lower alkylene, and, if Z is aralkylene or alkylene, containing 0 to 3 unsaturated bonds;
X is selected from the group consisting of -NH-, -CONH-, -NHCO-, -CO-, -S- and -Si~
R9 is hydrogen, a protecting group, or a detectable label; and n is 1 when X is -NH-, -CONH-, -NHCO-, -CO-, or -S-, and is 3 when X is -Si~.
DNA1 is a first segment of DNA;
DNA2 is a second segment of DNA;
R3 is selected from the group consisting of hydrogen, hydroxyl, sulfhydryl, halogeno, amino, alkyl, allyl, OR6 wherein R6 is alkyl, allyl, silyl or phosphate;
R4 is either hydrogen or -(CH2)mOR7 wherein R7 is alkyl or -(CO)R8, R8 is alkyl, and m is an integer in the range of 0 to 12 inclusive;
R5 is -A-Z-X(R9)n;
A is oxygen, sulfur or methylene;
Z is arylene, C6-C18 aralkylene or C1-C12 alkylene containing 0 to heteroatoms selected from the group consisting of O, S, N,Si and Se and 0 to 6 linkages selected from the group consisting of-CO-, -COO-, -CONH-, -NHCO-, -S-S-, -SO2-, -CH(OH)-CH(OH)-, -CH(OR4)-CH(OR4)-, -O-PO(O)-O-, -O-PO(R4)-, -O-PO(OR4)-O-, -O-PO(OR4)-R5- and -PO(OR4)-O-R5- in which R4 is lower alkyl and R5 is lower alkylene, and, if Z is aralkylene or alkylene, containing 0 to 3 unsaturated bonds;
X is selected from the group consisting of -NH-, -CONH-, -NHCO-, -CO-, -S- and -Si~
R9 is hydrogen, a protecting group, or a detectable label; and n is 1 when X is -NH-, -CONH-, -NHCO-, -CO-, or -S-, and is 3 when X is -Si~.
7. A polynucleotide reagent having the structural formula wherein DNA1 is a first segment of DNA;
DNA2 is a second segment of DNA;
R3 is selected from the group consisting of hydrogen, hydroxyl, sulfhydryl, halogeno, amino, alkyl, allyl, OR6 wherein R6 is alkyl, allyl, silyl or phosphate;
R4 is either hydrogen or -(CH2)mOR7 wherein R7 is alkyl or -(CO)R8, R8 is alkyl, and m is an integer in the range of 0 to 12 inclusive, A is oxygen, sulfur or methylene; and Z is arylene, C6-C18 aralkylene or C1-C12 alkylene containing 0 to 6 heteroatomsselected from the group consisting of O, S, N, Si and Se and 0 to 6 linkages selected from the group consisting of -CO-,-COO-, -CONH-, -NHCO-, -S-S-, -SO2, -CH(OH)-CH(OH)-, -CH(OR4)-CH(OR4)-, -O-PO(O-)-O-, -O-PO(R4)-, -O-PO(OR4)-O-, -O-PO(OR4)-R5- and -PO(OR4)-O-R5- in which R4 is lower alkyl and R5 is lower alkylene, and, if Z is aralkylene or alkalene, containing 0 to 3 unsatursted bonds.
DNA2 is a second segment of DNA;
R3 is selected from the group consisting of hydrogen, hydroxyl, sulfhydryl, halogeno, amino, alkyl, allyl, OR6 wherein R6 is alkyl, allyl, silyl or phosphate;
R4 is either hydrogen or -(CH2)mOR7 wherein R7 is alkyl or -(CO)R8, R8 is alkyl, and m is an integer in the range of 0 to 12 inclusive, A is oxygen, sulfur or methylene; and Z is arylene, C6-C18 aralkylene or C1-C12 alkylene containing 0 to 6 heteroatomsselected from the group consisting of O, S, N, Si and Se and 0 to 6 linkages selected from the group consisting of -CO-,-COO-, -CONH-, -NHCO-, -S-S-, -SO2, -CH(OH)-CH(OH)-, -CH(OR4)-CH(OR4)-, -O-PO(O-)-O-, -O-PO(R4)-, -O-PO(OR4)-O-, -O-PO(OR4)-R5- and -PO(OR4)-O-R5- in which R4 is lower alkyl and R5 is lower alkylene, and, if Z is aralkylene or alkalene, containing 0 to 3 unsatursted bonds.
8. A polynucleotide reagent having the structural formula wherein DNA1 is a first segment of DNA;
DNA2 is a second segment of DNA;
R3 is selected from the group consisting of hydrogen, hydroxyl, sulfhydryl, halogeno, amino, alkyl, allyl, -OR6 wherein R6 is alkyl, allyl, silyl or phosphate;
R4 is either hydrogen or -(CH2)mOR7 wherein R7 is alkyl or -(CO)R3, R8 is alkyl, and m is an integer in the range of 0 to 12 inclusive, A is oxygen, sulfur or methylene; and Z is arylene, C6-C18 aralkylene or C1-C12 alkylene containing 0 to 6 heteroatomsselected from the group consisting of O, S, N, Si and Se and 0 to 6 linkages selected from the group consisting of-CO-,-COO-, -CONH-, -NHCO-, -S-S-, -SO2-, -CH(OH)-CH(OH)-, -CH(OR4)-CH(OR4)-, -O-PO(O)-O-, -O-PO(R4)-,-O-PO(OR4)-O-, -O-PO(OR4)-R5- and -PO(OR4)-O-R5- in which R4 is lower alkyl and R5 is lower alkylene, and, if Z is araikylene or alkylene, containing 0 to 3 unsaturated bonds.
DNA2 is a second segment of DNA;
R3 is selected from the group consisting of hydrogen, hydroxyl, sulfhydryl, halogeno, amino, alkyl, allyl, -OR6 wherein R6 is alkyl, allyl, silyl or phosphate;
R4 is either hydrogen or -(CH2)mOR7 wherein R7 is alkyl or -(CO)R3, R8 is alkyl, and m is an integer in the range of 0 to 12 inclusive, A is oxygen, sulfur or methylene; and Z is arylene, C6-C18 aralkylene or C1-C12 alkylene containing 0 to 6 heteroatomsselected from the group consisting of O, S, N, Si and Se and 0 to 6 linkages selected from the group consisting of-CO-,-COO-, -CONH-, -NHCO-, -S-S-, -SO2-, -CH(OH)-CH(OH)-, -CH(OR4)-CH(OR4)-, -O-PO(O)-O-, -O-PO(R4)-,-O-PO(OR4)-O-, -O-PO(OR4)-R5- and -PO(OR4)-O-R5- in which R4 is lower alkyl and R5 is lower alkylene, and, if Z is araikylene or alkylene, containing 0 to 3 unsaturated bonds.
9. A branched polynucleotide reagent having the structural formula wherein:
DNA1 is a first segment of DNA;
DNA2 is a second segment of DNA;
DNA3 is a third segment of DNA;
R3 is selected from the group consisting of hydrogen, hydroxyl, sulfhydryl, halogeno, amino, alkyl, allyl, -OR6 wherein R6 is alkyl, allyl, silyl or phosphate;
R4 is either hydrogen or -(CH2)mOR7 wherein R7 is alkyl or -(CO)R8, R8 is alkyl, and m is an integer in the range of 0 to 12 inclusive;
A is oxygen, sulfur or methylene; and Z is arylene, C6-C18 aralkylene or C1-C12 alkylene containing 0 to 6 heteroatomsselected from the group consisting of O, S, N, Si and Se and 0 to 6 linkages selected from the group consisting of -CO-, -COO-, -CONH-, -NHCO-, -S-S-, -SO2-, -CH(OH)-CH(OH)-, -CH(OR4)-CH(OR4)-, -O-PO(O-)-O-, -O-PO(R4)-, -O-PO(OR4)-O-, -O-PO(OR4)-R5- and -PO(OR4)-O-R5- in which R4 is lower alkyl and R5 is lower alkylene, and, if Z is aralkylene or alkylene, containing 0 to 3 unsaturated bonds.
DNA1 is a first segment of DNA;
DNA2 is a second segment of DNA;
DNA3 is a third segment of DNA;
R3 is selected from the group consisting of hydrogen, hydroxyl, sulfhydryl, halogeno, amino, alkyl, allyl, -OR6 wherein R6 is alkyl, allyl, silyl or phosphate;
R4 is either hydrogen or -(CH2)mOR7 wherein R7 is alkyl or -(CO)R8, R8 is alkyl, and m is an integer in the range of 0 to 12 inclusive;
A is oxygen, sulfur or methylene; and Z is arylene, C6-C18 aralkylene or C1-C12 alkylene containing 0 to 6 heteroatomsselected from the group consisting of O, S, N, Si and Se and 0 to 6 linkages selected from the group consisting of -CO-, -COO-, -CONH-, -NHCO-, -S-S-, -SO2-, -CH(OH)-CH(OH)-, -CH(OR4)-CH(OR4)-, -O-PO(O-)-O-, -O-PO(R4)-, -O-PO(OR4)-O-, -O-PO(OR4)-R5- and -PO(OR4)-O-R5- in which R4 is lower alkyl and R5 is lower alkylene, and, if Z is aralkylene or alkylene, containing 0 to 3 unsaturated bonds.
10. In a method for making a polynucleotide reagent comprising sequentially coupling nucleotidic monomers to a growing oligonucleotide chain, the improvement which comprises introducing an abasic site into the polynucleotide reagent by replacing a fraction of the nucleotidic monomers with the reagent of claim 9.
11. A method for making branched DNA, comprising: (a) sequentially coupling nucleotidic monomers to a growing oligonucleotide chain; (b) introducing branch points into the chain during step (a) by replacing a fraction of the nucleotidic monomers with monomeric reagents having linker arms at the 1 position; (c) sequentially adding nucleotidic monomers to the termini of the linker arms, wherein each of the monomeric reagents used in step (b) comprises a reagent of claim 1.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/296,368 US5597909A (en) | 1994-08-25 | 1994-08-25 | Polynucleotide reagents containing modified deoxyribose moieties, and associated methods of synthesis and use |
| US08/296,368 | 1994-08-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2196806A1 true CA2196806A1 (en) | 1996-02-29 |
Family
ID=23141731
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002196806A Abandoned CA2196806A1 (en) | 1994-08-25 | 1995-08-24 | Polynucleotide reagents having nonnucleotidic moieties, and associated methods of synthesis and use |
Country Status (10)
| Country | Link |
|---|---|
| US (2) | US5597909A (en) |
| EP (1) | EP0777674B1 (en) |
| JP (2) | JPH10504719A (en) |
| AT (1) | ATE209655T1 (en) |
| AU (1) | AU3494595A (en) |
| CA (1) | CA2196806A1 (en) |
| DE (1) | DE69524232T2 (en) |
| ES (1) | ES2169149T3 (en) |
| MX (1) | MX9701293A (en) |
| WO (1) | WO1996006104A1 (en) |
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| US6335434B1 (en) | 1998-06-16 | 2002-01-01 | Isis Pharmaceuticals, Inc., | Nucleosidic and non-nucleosidic folate conjugates |
| US8153602B1 (en) | 1991-11-19 | 2012-04-10 | Isis Pharmaceuticals, Inc. | Composition and methods for the pulmonary delivery of nucleic acids |
| ATE247128T1 (en) | 1993-09-03 | 2003-08-15 | Isis Pharmaceuticals Inc | AMINODERIVATIZED NUCLEOSIDES AND OLIGONUCLEOSIDES |
| WO1997014706A1 (en) | 1995-10-19 | 1997-04-24 | Nexstar Pharmaceuticals, Inc. | Method for solution phase synthesis of oligonucleotides |
| US7812149B2 (en) * | 1996-06-06 | 2010-10-12 | Isis Pharmaceuticals, Inc. | 2′-Fluoro substituted oligomeric compounds and compositions for use in gene modulations |
| US5898031A (en) * | 1996-06-06 | 1999-04-27 | Isis Pharmaceuticals, Inc. | Oligoribonucleotides for cleaving RNA |
| US20030044941A1 (en) | 1996-06-06 | 2003-03-06 | Crooke Stanley T. | Human RNase III and compositions and uses thereof |
| US20040147022A1 (en) * | 1996-06-06 | 2004-07-29 | Baker Brenda F. | 2'-methoxy substituted oligomeric compounds and compositions for use in gene modulations |
| US20040203024A1 (en) * | 1996-06-06 | 2004-10-14 | Baker Brenda F. | Modified oligonucleotides for use in RNA interference |
| US20050053976A1 (en) * | 1996-06-06 | 2005-03-10 | Baker Brenda F. | Chimeric oligomeric compounds and their use in gene modulation |
| WO2005121368A1 (en) * | 2004-06-03 | 2005-12-22 | Isis Pharmaceuticals, Inc. | Chimeric gapped oligomeric compositions |
| US9096636B2 (en) | 1996-06-06 | 2015-08-04 | Isis Pharmaceuticals, Inc. | Chimeric oligomeric compounds and their use in gene modulation |
| US5853993A (en) * | 1996-10-21 | 1998-12-29 | Hewlett-Packard Company | Signal enhancement method and kit |
| US6187536B1 (en) | 1997-02-18 | 2001-02-13 | Thomas Jefferson University | Methods of identifying and detecting pancreatic cancer |
| CA2286320A1 (en) * | 1997-04-21 | 1998-10-29 | Proligo Llc. | Method for solution phase synthesis of oligonucleotides |
| WO1999001579A1 (en) | 1997-07-01 | 1999-01-14 | Isis Pharmaceuticals, Inc. | Compositions and methods for the delivery of oligonucleotides via the alimentary canal |
| US7135333B1 (en) | 1997-08-07 | 2006-11-14 | Thomas Jefferson University | Compositions that specifically bind to colorectal cancer cells and methods of using the same |
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| US4517338A (en) * | 1983-06-20 | 1985-05-14 | Chiron Corporation | Multiple reactor system and method for polynucleotide synthesis |
| US4483964A (en) * | 1983-06-20 | 1984-11-20 | Chiron Corporation | Reactor system and method for polynucleotide synthesis |
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- 1995-04-26 US US08/429,197 patent/US5594117A/en not_active Expired - Fee Related
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- 1995-08-24 AU AU34945/95A patent/AU3494595A/en not_active Abandoned
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| ES2169149T3 (en) | 2002-07-01 |
| US5597909A (en) | 1997-01-28 |
| JP2006068022A (en) | 2006-03-16 |
| US5594117A (en) | 1997-01-14 |
| EP0777674A1 (en) | 1997-06-11 |
| DE69524232D1 (en) | 2002-01-10 |
| EP0777674B1 (en) | 2001-11-28 |
| MX9701293A (en) | 1997-05-31 |
| DE69524232T2 (en) | 2002-05-23 |
| ATE209655T1 (en) | 2001-12-15 |
| AU3494595A (en) | 1996-03-14 |
| WO1996006104A1 (en) | 1996-02-29 |
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