Modified polymerases for improved incorporation of nucleotide analogues
First Claim
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1. A method for incorporating modified nucleotides into DNA comprising allowing the following components to interact:
- (i) a DNA template;
(ii) a nucleotide solution; and
(iii) a recombinant DNA polymerase comprising an amino acid sequence that is at least 80% identical to SEQ ID NO;
10, which recombinant DNA polymerase comprises at least one amino acid substitution mutation at one or more positions functionally equivalent to Thr144, Gly153, Lys476, Leu478, Thr590, Ala639 or Asp718 in the 9°
N DNA polymerase amino acid sequence, wherein the mutation at the position functionally equivalent to Gly153 comprises a mutation to a polar amino acid, wherein the mutation at the position functionally equivalent to Lys476 comprises a mutation to a hydrophobic amino acid, wherein the mutation at the position functionally equivalent to Leu478 comprises a mutation to a polar amino acid, wherein the mutation at the position functionally equivalent to Asp718 comprises a mutation homologous to Asp718Asn, and wherein the DNA polymerase is a family B DNA polymerase.
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Abstract
Presented herein are polymerase enzymes for improved incorporation of nucleotide analogues, in particular nucleotides which are modified at the 3′ sugar hydroxyl, as well as methods and kits using the same.
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Citations
16 Claims
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1. A method for incorporating modified nucleotides into DNA comprising allowing the following components to interact:
- (i) a DNA template;
(ii) a nucleotide solution; and
(iii) a recombinant DNA polymerase comprising an amino acid sequence that is at least 80% identical to SEQ ID NO;
10, which recombinant DNA polymerase comprises at least one amino acid substitution mutation at one or more positions functionally equivalent to Thr144, Gly153, Lys476, Leu478, Thr590, Ala639 or Asp718 in the 9°
N DNA polymerase amino acid sequence, wherein the mutation at the position functionally equivalent to Gly153 comprises a mutation to a polar amino acid, wherein the mutation at the position functionally equivalent to Lys476 comprises a mutation to a hydrophobic amino acid, wherein the mutation at the position functionally equivalent to Leu478 comprises a mutation to a polar amino acid, wherein the mutation at the position functionally equivalent to Asp718 comprises a mutation homologous to Asp718Asn, and wherein the DNA polymerase is a family B DNA polymerase. - View Dependent Claims (2, 3)
- (i) a DNA template;
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4. A kit for performing a nucleotide incorporation reaction comprising:
- a nucleotide solution and a recombinant DNA polymerase comprising an amino acid sequence that is at least 80% identical to SEQ ID NO;
10, which recombinant DNA polymerase comprises at least one amino acid substitution mutation at one or more positions functionally equivalent to Thr144, Gly153, Lys476, Leu478, Thr590, Ala639 or Asp718 in the 9°
N DNA polymerase amino acid sequence, wherein the mutation at the position functionally equivalent to Gly153 comprises a mutation to a polar amino acid, wherein the mutation at the position functionally equivalent to Lys476 comprises a mutation to a hydrophobic amino acid, wherein the mutation at the position functionally equivalent to Leu478 comprises a mutation to a polar amino acid, wherein the mutation at the position functionally equivalent to Asp718 comprises a mutation homologous to Asp718Asn, and wherein the DNA polymerase is a family B DNA polymerase. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
- a nucleotide solution and a recombinant DNA polymerase comprising an amino acid sequence that is at least 80% identical to SEQ ID NO;
Specification