Methods of using improved polymerases
First Claim
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1. A method of sequencing a target nucleic acid in an aqueous solution using an improved DNA polymerase, the method comprising:
- (a) contacting the target nucleic acid with a thermally stable DNA polymerase, wherein the DNA polymerase is joined 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, andwherein the solution 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 DNA polymerase; and
(c) identifying the nucleotides that are incorporated into the synthesized nucleic acid strand upon the template-dependent extension of the primer by the DNA polymerase, thereby sequencing the nucleic acid.
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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.
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6 Claims
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1. A method of sequencing a target nucleic acid in an aqueous solution using an improved DNA polymerase, the method comprising:
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(a) contacting the target nucleic acid with a thermally stable DNA polymerase, wherein the DNA polymerase is joined 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, andwherein the solution 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 DNA polymerase; and (c) identifying the nucleotides that are incorporated into the synthesized nucleic acid strand upon the template-dependent extension of the primer by the DNA polymerase, thereby sequencing the nucleic acid. - View Dependent Claims (2, 3, 4)
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5. A method of sequencing a target nucleic acid in an aqueous solution using an improved DNA polymerase, the method comprising:
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(a) contacting the target nucleic acid with a thermally stable DNA polymerase, wherein the DNA polymerase is joined to a sequence non-specific double-stranded nucleic acid binding domain that specifically binds to polyclonal antibodies generated against either Sso7d (SEQ ID NO;
2) or Sac7d (amino acids 7-71 of SEQ ID NO;
10), 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, andwherein the solution 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 DNA polymerase; and (c) identifying the nucleotides that are incorporated into the synthesized nucleic acid strand upon the template-dependent extension of the primer by the DNA polymerase, thereby sequencing the nucleic acid. - View Dependent Claims (6)
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Specification