Generation of modified polymerases for improved accuracy in single molecule sequencing
First Claim
1. A composition comprising a recombinant DNA polymerase homologous to a Φ
- 29 DNA polymerase, which recombinant DNA polymerase comprises a mutation or combination of mutations relative to a wild-type Φ
29 DNA polymerase (SEQ ID NO;
1) selected from;
(a) an L253 mutation, wherein the polymerase further comprises a mutation at one or more of;
T368, E375, A484, or K512;
(b) an E375 and K512 mutation, wherein the polymerase further comprises a mutation at one or more of;
L253, T368 or A484;
(c) an I93 mutation;
(d) an S215 mutation;
(e) an E420 mutation;
(f) a P477 mutation;
(g) a D66R mutation;
(h) a K135R mutation;
(i) a K138R mutation;
(j) an L253T mutation;
(k) a Y369G mutation;
(l) a Y369L mutation;
(m) an L384M mutation;
(n) a K422A mutation;
(o) an I504R mutation;
(p) an E508K mutation;
(q) an E508R mutation;
(r) a D510K mutation;
(s) at least one mutation or combination of mutations selected from those listed in Tables 6, 9 and 10; and
(t) a T368 mutation, wherein the polymerase further comprises a mutation at one or more of;
E375 or K512.
1 Assignment
0 Petitions
Accused Products
Abstract
Provided are compositions comprising recombinant DNA polymerases that include amino acid substitutions, insertions, deletions and/or heterologous or exogenous features that confer modified properties upon the polymerase for enhanced single molecule sequencing. Such properties can include reduced reaction rates at one or more steps of the polymerase kinetic cycle, increased closed polymerase/DNA complex stability, enhanced metal ion coordination, reduced exonuclease activity, decreased branching fractions, and the like. Polymerases that exhibit branching fractions that are less than the branching fractions of the polymerases from which they were derived, or branching fractions that are less than about 25% for a phosphate-labeled nucleotide analog, are also provided. 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.
118 Citations
36 Claims
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1. A composition comprising a recombinant DNA polymerase homologous to a Φ
- 29 DNA polymerase, which recombinant DNA polymerase comprises a mutation or combination of mutations relative to a wild-type Φ
29 DNA polymerase (SEQ ID NO;
1) selected from;
(a) an L253 mutation, wherein the polymerase further comprises a mutation at one or more of;
T368, E375, A484, or K512;
(b) an E375 and K512 mutation, wherein the polymerase further comprises a mutation at one or more of;
L253, T368 or A484;
(c) an I93 mutation;
(d) an S215 mutation;
(e) an E420 mutation;
(f) a P477 mutation;
(g) a D66R mutation;
(h) a K135R mutation;
(i) a K138R mutation;
(j) an L253T mutation;
(k) a Y369G mutation;
(l) a Y369L mutation;
(m) an L384M mutation;
(n) a K422A mutation;
(o) an I504R mutation;
(p) an E508K mutation;
(q) an E508R mutation;
(r) a D510K mutation;
(s) at least one mutation or combination of mutations selected from those listed in Tables 6, 9 and 10; and
(t) a T368 mutation, wherein the polymerase further comprises a mutation at one or more of;
E375 or K512. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 33, 35)
- 29 DNA polymerase, which recombinant DNA polymerase comprises a mutation or combination of mutations relative to a wild-type Φ
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30-32. -32. (canceled)
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34. (canceled)
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36-160. -160. (canceled)
Specification