Methods and compositions for improving fidelity in a nucleic acid synthesis reaction
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C12P-019/34
C12P-019/00
C12Q-001/68
출원번호
US-0046448
(2005-01-28)
등록번호
US-7482120
(2009-01-27)
발명자
/ 주소
Buzby,Philip Richard
출원인 / 주소
Helicos Biosciences Corporation
대리인 / 주소
Cooley Godward Kronish LLP
인용정보
피인용 횟수 :
39인용 특허 :
337
초록▼
The invention provides methods and compositions for improving the fidelity of a sequencing-by-synthesis reaction by using a nucleotide derivative that forms a hydrogen bond with a complementary nucleotide on a template, but fails to form a phosphodiester bond with the 3' hydroxyl group of a primer u
The invention provides methods and compositions for improving the fidelity of a sequencing-by-synthesis reaction by using a nucleotide derivative that forms a hydrogen bond with a complementary nucleotide on a template, but fails to form a phosphodiester bond with the 3' hydroxyl group of a primer under conditions otherwise suitable for a polymerization reaction; thereby blocking incorporation of a mismatched nucleotide.
대표청구항▼
I claim: 1. A method for inhibiting nucleotide misincorporation in a nucleic acid synthesis reaction, the method comprising conducting a polymerization reaction on a nucleic acid duplex comprising a template and a primer in the presence of a nucleic acid polymerase, a first detectably labeled nucle
I claim: 1. A method for inhibiting nucleotide misincorporation in a nucleic acid synthesis reaction, the method comprising conducting a polymerization reaction on a nucleic acid duplex comprising a template and a primer in the presence of a nucleic acid polymerase, a first detectably labeled nucleotide corresponding to a first nucleotide species complementary to the position opposite the incorporation site at the 3' terminus of the primer, a second nucleotide of a different species, and at least one nucleotide derivative, each of the nucleotide derivatives corresponding to a different nucleotide species than the first nucleotide species, wherein each nucleotide derivative comprises a modification that inhibits formation of a phosphodiester bond between the nucleotide derivative and a free 3' hydroxyl on a primer nucleotide. 2. The method of claim 1 further comprising removing nucleotide derivatives and nucleotides that are not incorporated into the primer. 3. The method of claim 2 further comprising the step of repeating said conducting and removing steps using a second nucleotide species and a nucleotide derivative corresponding to a nucleotide species different from said second species. 4. The method of claim 1 wherein said nucleotide derivative comprises a triphosphate group lacking an oxygen between an α-phosphate and a β-phosphate such that said nucleotide derivative is prevented from forming a phosphodiester bond with said free 3' hydroxyl group on the primer. 5. The method of claim 4 wherein said derivative comprises substitution of an oxygen molecule with a carbon, nitrogen or sulfur molecule. 6. The method of claim 4 wherein said derivative comprises substitution of an oxygen molecule with a methylene group. 7. The method of claim 4 wherein said derivative comprises substitution of an oxygen molecule with a thiol, alkyl, carbonyl, amine, alcohol, aryl or an amino acid group. 8. The method of claim 1 wherein, if said template comprises a nucleotide opposite a position immediately adjacent to a 3' terminus of the primer that is complementary to said nucleotide derivative but not complementary to said first nucleotide, said nucleotide derivative forms a hydrogen bond with its complementary nucleotide so as to prevent said first nucleotide from bonding thereto and misincorporating into said primer in said nucleic acid synthesis reaction. 9. The method of claim 1 wherein said nucleic acid duplex is bound to a solid support. 10. The method of claim 1 comprising a plurality of said duplex, each member of said plurality being individually optically resolvable. 11. A method for sequencing a nucleic acid, the method comprising the steps of: (a) exposing a nucleic acid duplex comprising a template and a primer to a nucleic acid polymerase, a first labeled nucleotide, and at least one nucleotide derivative corresponding to a nucleotide species different from said first nucleotide; wherein said nucleotide derivative comprises a modification that inhibits formation of a phosphodiester bond between the nucleotide derivative and a 3' hydroxyl group of the primer, and (b) removing nucleotide derivatives and labeled nucleotides that are not incorporated into the primer; (c) determining incorporation of the labeled nucleotide and thereby identifying a nucleotide that is complementary to a nucleotide at a position on said template opposite the incorporated labeled nucleotide; and (d) repeating steps (a), (b) and (c) with a second labeled nucleotide and at least one nucleotide derivative corresponding to a nucleotide species different from said second labeled nucleotide. 12. The method of claim 11 wherein said nucleotide derivative comprises a triphosphate group having a molecule other than oxygen between an α-phosphate and β-phosphate. 13. The method of claim 12 wherein said derivative comprises substitution of an oxygen molecule with a carbon, nitrogen or sulfur molecule. 14. The method of claim 12 wherein said derivative comprises a substitution of an oxygen molecule with a methylene group. 15. The method of claim 2 wherein said nucleotide derivative comprises a triphosphate group having a modified α-or β-phosphate. 16. The method of claim 15 wherein said modification comprises a substitution of an oxygen molecule with a thiol, alkyl, carbonyl, amine, alcohol, aryl or an amino acid group. 17. The method of claim 11 wherein said exposing step is performed in the presence of at least two nucleotide derivatives, each derivative corresponding to a nucleotide species different from said first nucleotide. 18. The method of claim 11 wherein said exposing step is performed in the presence of three nucleotide derivatives, each derivative corresponding to a nucleotide species different from said first nucleotide. 19. The method of claim 11 further comprising the step of compiling a sequence of nucleotides incorporated into said primer. 20. The method of claim 11 wherein said labeled nucleotide comprises a labeled dNTP. 21. The method of claim 11 wherein said first nucleotide is a deoxyadenosine triphosphate and said at least one nucleotide derivative corresponds to a nucleotide species selected from the group consisting of deoxyguanosine triphosphate, deoxycytidine triphosphate, and deoxyuridine triphosphate. 22. The method of claim 11 wherein said first nucleotide is a deoxyguanosine triphosphate thereof and said at least one nucleotide derivative corresponds to a nucleotide species selected from the group consisting of deoxyadenosine triphosphate, deoxycytidine triphosphate and deoxyuridine triphosphate. 23. The method of claim 11 wherein said first nucleotide is a deoxycytidine triphosphate thereof and said three nucleotide derivatives corresponds to the nucleotide species of deoxyadenosine triphosphate, deoxyguanosine triphosphate and deoxyuridine triphosphate. 24. The method of claim 11 wherein said first nucleotides is a deoxyuridine triphosphate thereof and said at least one nucleotide derivative corresponds to a nucleotide species selected from the group consisting of deoxyadenosine triphosphate, deoxyguanosine triphosphate and deoxycytidine triphosphate. 25. The method of claim 18 wherein said first nucleotide is a deoxyadenosine triphosphate thereof and said three nucleotide derivatives correspond to deoxyguanosine triphosphate, deoxycytidine triphosphate, and deoxyuridine triphosphate. 26. The method of claim 18 wherein said first nucleotide is a deoxyguanosine triphosphate and said three nucleotide derivatives correspond to deoxyadenosine triphosphate, deoxycytidine triphosphate and deoxyuridine triphosphate. 27. The method of claim 18 wherein said first nucleotide is a deoxycytidine triphosphate and said three nucleotide derivatives correspond to deoxyadenosine triphosphate, deoxyguanosine triphosphate and deoxyuridine triphosphate. 28. The method of claim 18 wherein said first nucleotide is a deoxyuridine triphosphate and said three nucleotide derivatives correspond to deoxyadenosine triphosphate, deoxyguanosine triphosphate and deoxycytidine triphosphate. 29. The method of claim 11, wherein said exposing step comprises first exposing said nucleic acid duplex to said at least one nucleotide derivative, then exposing said nucleic acid duplex to said nucleic acid polymerase and said labeled nucleotide. 30. The method of claim 1 wherein the polymerization reaction is conducted in the presence of three different species of nucleotide derivatives.
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이 특허에 인용된 특허 (337)
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