Polymerases engineered to reduce nucleotide-independent DNA binding
First Claim
Patent Images
1. An engineered DNA polymerase, comprising a variant of the sequence of SEQ ID NO:
- 3, said variant being at least 80% identical to SEQ ID NO;
3 and comprising an amino acid substitution mutation at one or more of positions K250, Q281, D355, Q425, and D532.
3 Assignments
0 Petitions
Accused Products
Abstract
Provided are engineered DNA polymerases exhibiting modified functionality, and polynucleotides encoding same. Modified features include: (1) reduced catalytic activity in the presence of magnesium ions and/or (2) reduced affinity for primed template nucleic acid molecules in the absence of cognate nucleotide, and an ability to discriminate between cognate and non-cognate nucleotides under low salt conditions. Sequencing By Binding™ procedures employing the engineered polymerases have certain advantages. The engineered polymerases can have other uses as well.
23 Citations
42 Claims
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1. An engineered DNA polymerase, comprising a variant of the sequence of SEQ ID NO:
- 3, said variant being at least 80% identical to SEQ ID NO;
3 and comprising an amino acid substitution mutation at one or more of positions K250, Q281, D355, Q425, and D532. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
- 3, said variant being at least 80% identical to SEQ ID NO;
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23. An isolated mutant DNA polymerase comprising a variant of the sequence of SEQ ID NO:
- 2, said variant being at least 80% identical to SEQ ID NO;
2 and wherein the variant comprises Glu (E) at position 290. - View Dependent Claims (31, 32)
- 2, said variant being at least 80% identical to SEQ ID NO;
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24. An isolated mutant DNA polymerase comprising a variant of the sequence of SEQ ID NO:
- 2, said variant being at least 80% identical to SEQ ID NO;
2 and wherein the variant comprises Cys (C) at position 259, and Cys (C) at position 434. - View Dependent Claims (33, 34)
- 2, said variant being at least 80% identical to SEQ ID NO;
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25. An isolated mutant DNA polymerase comprising a variant of the sequence of SEQ ID NO:
- 2, said variant being at least 80% identical to SEQ ID NO;
2 and wherein the variant comprises Glu (E) at position 290, Cys (C) at position 259, and Cys (C) at position 434. - View Dependent Claims (35, 36)
- 2, said variant being at least 80% identical to SEQ ID NO;
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26. An isolated mutant DNA polymerase comprising a variant of the sequence of SEQ ID NO:
- 2, said variant being at least 80% identical to SEQ ID NO;
2 and wherein the variant comprises Glu (E) at position 364, and further comprises Glu (E) at position 290. - View Dependent Claims (37, 38)
- 2, said variant being at least 80% identical to SEQ ID NO;
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27. An isolated mutant DNA polymerase comprising a variant of the sequence of SEQ ID NO:
- 2, said variant being at least 80% identical to SEQ ID NO;
2 and wherein the variant comprises Glu (E) at position 364, and further comprises Cys (C) at position 259 and Cys (C) at position 434. - View Dependent Claims (39, 40)
- 2, said variant being at least 80% identical to SEQ ID NO;
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28. An isolated mutant DNA polymerase comprising a variant of the sequence of SEQ ID NO:
- 2, said variant being at least 80% identical to SEQ ID NO;
2 and wherein the variant comprises Glu (E) at position 364, and further comprises Glu (E) at position 290, Cys (C) at position 259, and Cys (C) at position 434. - View Dependent Claims (41, 42)
- 2, said variant being at least 80% identical to SEQ ID NO;
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29. A reaction mixture, comprising:
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a DNA polymerase selected from the group consisting of, (i) an engineered DNA polymerase that comprises a variant of the sequence of SEQ ID NO;
3, said variant being at least 80% identical to SEQ ID NO;
3 and comprising an amino acid substitution mutation at one or more of positions K250, Q281, D355, Q425, and D532,(ii) an engineered DNA polymerase that comprises a variant of the sequence of SEQ ID NO;
2, said variant being at least 80% identical to SEQ ID NO;
2 and wherein the variant comprises Glu (E) at position 290,(iii) an engineered DNA polymerase that comprises a variant of the sequence of SEQ ID NO;
2, said variant being at least 80% identical to SEQ ID NO;
2 and wherein the variant comprises Cys (C) at position 259, and Cys (C) at position 434, and(iv) an engineered DNA polymerase that comprises a variant of the sequence of SEQ ID NO;
2, said variant being at least 80% identical to SEQ ID NO;
2 and wherein the variant comprises Glu (E) at position 290, Cys (C) at position 259, and Cys (C) at position 434;a primed template nucleic acid molecule, optionally comprising a reversible terminator nucleotide at a 3′
-end thereof; andat least one nucleotide.
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30. A kit for identifying the cognate nucleotide for a primed template nucleic acid molecule, comprising:
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a DNA polymerase selected from the group consisting of, (i) an engineered DNA polymerase that comprises a variant of the sequence of SEQ ID NO;
3, said variant being at least 80% identical to SEQ ID NO;
3 and comprising an amino acid substitution mutation at one or more of positions K250, Q281, D355, Q425, and D532,(ii) an engineered DNA polymerase that comprises a variant of the sequence of SEQ ID NO;
2, said variant being at least 80% identical to SEQ ID NO;
2 and wherein the variant comprises Glu (E) at position 290,(iii) an engineered DNA polymerase that comprises a variant of the sequence of SEQ ID NO;
2, said variant being at least 80% identical to SEQ ID NO;
2 and wherein the variant comprises Cys (C) at position 259, and Cys (C) at position 434, and(iv) an engineered DNA polymerase that comprises a variant of the sequence of SEQ ID NO;
2, said variant being at least 80% identical to SEQ ID NO;
2 and wherein the variant comprises Glu (E) at position 290, Cys (C) at position 259, and Cys (C) at position 434;a plurality of nucleotides or analogs thereof; and a plurality of reversible terminator nucleotides.
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Specification