Controllable strand scission of mini circle DNA
First Claim
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1. A method for the synthesis of a nucleic acid comprising:
- providing a complex, wherein said complex comprises a polymerase, a first template, nucleoside triphosphates and/or analogues thereof, and a primer, wherein said first template comprises at least one selectively cleavable linkage within a nucleotide sequence of the template, and further wherein said first template is a circular template;
cleaving said selectively cleavable linkage to provide a new terminus in the template in the complex; and
synthesizing said nucleic acid by polymerase mediated, first template dependent extension of said primer.
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Abstract
The invention provides methods and compositions for the controlled termination of polymerase mediated primer extension reactions. The methods and compositions of the invention are broadly useful, and in a preferred aspect can be used in identifying sequence elements of template nucleic acids. Control of termination not only provides temporal control over termination, but, when used in conjunction with optically confined reaction regions, also spatially controls such termination.
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Citations
18 Claims
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1. A method for the synthesis of a nucleic acid comprising:
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providing a complex, wherein said complex comprises a polymerase, a first template, nucleoside triphosphates and/or analogues thereof, and a primer, wherein said first template comprises at least one selectively cleavable linkage within a nucleotide sequence of the template, and further wherein said first template is a circular template; cleaving said selectively cleavable linkage to provide a new terminus in the template in the complex; and synthesizing said nucleic acid by polymerase mediated, first template dependent extension of said primer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 17, 18)
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15. A method of identifying a base in a nucleic acid template, comprising:
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providing a polymerase/template/primer complex, wherein the template comprises a cleavable linking group within a nucleotide sequence of the template, and further wherein said template is a circular template; cleaving the cleavable linking group to arrest synthesis; identifying one or more nucleotides or nucleotide analogues adjacent to said cleavable linking group, thereby identifying a base in said nucleic acid template. - View Dependent Claims (16)
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Specification