Method and compositions for sequencing nucleic acid molecules
First Claim
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1. A method for determining the sequence of a region of one strand of a double-stranded nucleic acid target molecule, wherein said method comprises incubating said nucleic acid target molecule in the presence of an exonuclease activity, a polymerase activity and four differentially detectable, exonuclease activity-resistant, chain terminator nucleotide species.
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Abstract
The invention relates to methods, compositions, kits and apparati for sequencing nucleic acid molecules. The invention particularly concerns the use of an exonuclease activity in concert with a polymerase activity to mediate such sequencing.
64 Citations
37 Claims
- 1. A method for determining the sequence of a region of one strand of a double-stranded nucleic acid target molecule, wherein said method comprises incubating said nucleic acid target molecule in the presence of an exonuclease activity, a polymerase activity and four differentially detectable, exonuclease activity-resistant, chain terminator nucleotide species.
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13. A method for determining the nucleotide sequence of a region of a double-stranded nucleic acid target molecule, wherein said method comprises the steps:
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(A) incubating a preparation of said double-stranded target molecule in the presence of a 3′
to 5′
exonuclease activity, wherein said double-stranded nucleic acid target molecule possess at least one 3′
terminus that is a substrate for said exonuclease activity, wherein said incubation is conducted under conditions sufficient to permit said exonuclease activity to produce a nested population of double-stranded nucleic acid target molecule having at least one degraded 3′
termini;
(B) incubating said nested population of double-stranded nucleic acid target molecule in the presence of a polymerase activity and at least one detectably labeled, exonuclease activity-resistant, chain terminator nucleotide species, wherein said incubation is conducted under conditions sufficient to permit said polymerase activity to mediate the template-dependent incorporation of one of said nucleotide species onto the 3′
terminus of a nucleic acid target molecule whose 3′
terminus was degraded by said exonuclease activity; and
(C) determining the identity of the differentially detectable, exonuclease activity-resistant, chain terminator nucleotide species incorporated onto said 3′
terminus at said selected region. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 27, 28, 29, 30, 31, 32)
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26. An in vitro composition comprising a double-stranded nucleic acid target molecule, an exonuclease activity, a polymerase activity and four differentially detectable, exonuclease activity-resistant, chain terminator nucleotide species.
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33. A kit specially adapted to facilitate the sequencing of a target nucleic acid molecule, said kit comprising a first container comprising a primer A, a second container comprising a primer B, and a third container containing an exonuclease activity, wherein said primers A and B mediate the amplification of a double-stranded nucleic acid molecule comprising said target nucleic acid molecule, and wherein at least one of said primer A or said primer B possesses a 5′
- terminus having at least one modified nucleotide.
- View Dependent Claims (34, 35, 36)
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37. A sequenator, comprising an apparatus for determining the identity of fluoresecently labeled exonuclease activity-resistant, chain terminator nucleotide species incorporated onto the 3′
- termini of a nucleic acid target molecule whose 3′
terminus was degraded by said exonuclease; and
then extended by a template-dependent polymerase to incorporate said fluorescently labeled nucleotide species.
- termini of a nucleic acid target molecule whose 3′
Specification