Recombinant polymerases for improved single molecule sequencing
First Claim
1. A composition comprising a recombinant DNA polymerase, which recombinant DNA polymerase comprises an amino acid sequence that is at least 90% identical to SEQ ID NO:
- 1 or SEQ ID NO;
2;
which recombinant polymerase comprises a mutation at position V250 and a mutation at position L253, wherein identification of positions is relative to wild-type Φ
29 polymerase (SEQ ID NO;
1); and
which recombinant DNA polymerase exhibits polymerase activity.
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Accused Products
Abstract
Provided are compositions comprising recombinant DNA polymerases that include amino acid substitutions, insertions, deletions, and/or exogenous features that confer modified properties upon the polymerase for enhanced single molecule sequencing. Such properties can include enhanced metal ion coordination, reduced exonuclease activity, reduced reaction rates at one or more steps of the polymerase kinetic cycle, decreased branching fraction, altered cofactor selectivity, increased yield, increased thermostability, increased accuracy, increased speed, increased readlength, and the like. Also provided are nucleic acids which encode the polymerases with the aforementioned phenotypes, as well as methods of using such polymerases to make a DNA or to sequence a DNA template.
63 Citations
8 Claims
-
1. A composition comprising a recombinant DNA polymerase, which recombinant DNA polymerase comprises an amino acid sequence that is at least 90% identical to SEQ ID NO:
- 1 or SEQ ID NO;
2;
which recombinant polymerase comprises a mutation at position V250 and a mutation at position L253, wherein identification of positions is relative to wild-type Φ
29 polymerase (SEQ ID NO;
1); and
which recombinant DNA polymerase exhibits polymerase activity. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
- 1 or SEQ ID NO;
Specification