Methods of using improved polymerases
First Claim
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1. A method of increasing the yield from a polymerase reaction on a target nucleic acid present in a solution that comprises a fluorescent dye that detects double-stranded DNA, the method comprising:
- (a) contacting the target nucleic acid with a DNA polymerase, wherein the DNA polymerase comprises a polymerase domain fused to a sequence-non-specific double-stranded nucleic-acid-binding domain that comprises at least 75% amino acid sequence identity to the Sso7d amino acid sequence set forth in SEQ ID NO;
2 and enhances the processivity of the DNA polymerase compared to an identical DNA polymerase not having the sequence non-specific double-stranded nucleic-acid binding domain fused to it;
wherein the solution comprises the fluorescent dye and is of a composition that permits the sequence non-specific double-stranded nucleic acid binding domain to bind to the target nucleic acid and the polymerase domain to extend a primer that is hybridized to the target nucleic acid sequence;
(b) incubating the solution under conditions in which the primer is extended by the polymerase.
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Abstract
This invention provides for methods of sequencing and performing polymerase reactions using an improved generation of nucleic acid polymerases. The improvement is the fusion of a sequence-non-specific nucleic-acid-binding domain to the enzyme in a manner that enhances the processivity of the polymerase.
9 Citations
13 Claims
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1. A method of increasing the yield from a polymerase reaction on a target nucleic acid present in a solution that comprises a fluorescent dye that detects double-stranded DNA, the method comprising:
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(a) contacting the target nucleic acid with a DNA polymerase, wherein the DNA polymerase comprises a polymerase domain fused to a sequence-non-specific double-stranded nucleic-acid-binding domain that comprises at least 75% amino acid sequence identity to the Sso7d amino acid sequence set forth in SEQ ID NO;
2 and enhances the processivity of the DNA polymerase compared to an identical DNA polymerase not having the sequence non-specific double-stranded nucleic-acid binding domain fused to it;wherein the solution comprises the fluorescent dye and is of a composition that permits the sequence non-specific double-stranded nucleic acid binding domain to bind to the target nucleic acid and the polymerase domain to extend a primer that is hybridized to the target nucleic acid sequence; (b) incubating the solution under conditions in which the primer is extended by the polymerase. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of increasing the yield from a polymerase reaction on a target nucleic acid present in a crude cellular extract, the method comprising:
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(a) contacting the target nucleic acid with a DNA polymerase, wherein the DNA polymerase comprises a polymerase domain fused to a sequence-non-specific double-stranded nucleic-acid-binding domain that comprises at least 75% amino acid sequence identity to the Sso7d amino acid sequence set forth in SEQ ID NO;
2 and enhances the processivity of the DNA polymerase compared to an identical DNA polymerase not having the sequence non-specific double-stranded nucleic-acid binding domain fused to it;wherein the solution comprises impurities from the crude cellular extract and is of a composition that permits the sequence non-specific double-stranded nucleic acid binding domain to bind to the target nucleic acid and the polymerase domain to extend a primer that is hybridized to the target nucleic acid sequence; (b) incubating the solution under conditions in which the primer is extended by the polymerase. - View Dependent Claims (9, 10, 11, 12, 13)
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Specification