DNA polymerases
First Claim
1. A Taq DNA polymerase mutant comprising SEQ ID NO:
- 13 amino acid sequence with a mutation at position E230 and optionally one or more of the following mutations;
E189K, H28R, L30R, G38R, F73V, H75R, E76A, E76G, E76K, E90K, K206R, E315K, A348V, L351F, A439T, D452N, G504S, E507A, E507K, D551N, L552R, I553V, D578N, H676R, Q680R, D732G, E734G, E734K, and F749V;
wherein the polymerase mutant exhibits relative to wild-type DNA polymerase increased polymerase speed, increased affinity to DNA substrate and/or increased resistance to a DNA polymerase inhibitor.
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Accused Products
Abstract
A DNA polymerase mutant comprising a Taq DNA polymerase amino acid sequence with a mutation at one or more of the following selected amino acid positions: E189K, E230K, E507K, H28R, L30R, G38R, F73V, H75R, E76A, E76G, E76K, E90K, K206R, E315K, A348V, L351F, A439T, D452N, G504S, E507A, D551N, L552R, I553V, D578N, H676R, Q680R, D732G, E734G, E734K, F749V; wherein the polymerase mutant exhibits relative to wild-type DNA polymerase increased polymerase speed, increased affinity to DNA substrate and/or increased resistance to a DNA polymerase inhibitor; and wherein, when the mutation is E507K in combination with two or more further mutations or the mutation is Q680R in combination with four or more further mutations, at least one of the further mutations is at one of the selected amino acid positions; and when the mutation is I553V, this is not in combination with D551S.
14 Citations
21 Claims
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1. A Taq DNA polymerase mutant comprising SEQ ID NO:
- 13 amino acid sequence with a mutation at position E230 and optionally one or more of the following mutations;
E189K, H28R, L30R, G38R, F73V, H75R, E76A, E76G, E76K, E90K, K206R, E315K, A348V, L351F, A439T, D452N, G504S, E507A, E507K, D551N, L552R, I553V, D578N, H676R, Q680R, D732G, E734G, E734K, and F749V;
wherein the polymerase mutant exhibits relative to wild-type DNA polymerase increased polymerase speed, increased affinity to DNA substrate and/or increased resistance to a DNA polymerase inhibitor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
- 13 amino acid sequence with a mutation at position E230 and optionally one or more of the following mutations;
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21. A DNA polymerase obtainable by a process comprising:
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(1) subjecting a polynucleotide encoding a Taq DNA polymerase to error-prone PCR to generate a library comprising an array of different polynucleotides; (2) screening the library for increased polymerase speed, increased polymerase affinity to DNA substrate or increase resistance to a DNA polymerase inhibitor; (3) selecting one or more DNA polymerases from screening step 2; and (4) repeating steps 1 to 3 until a final DNA polymerase is obtained; wherein the final DNA polymerase comprises SEQ ID NO;
13 amino acid sequence with a mutation at position E230, and optionally one or more of the following mutations;
E189K, H28R, L30R, G38R, F73V, H75R, E76A, E76G, E76K, E90K, K206R, E315K, A348V, L351F, A439T, D452N, G504S, E507A, E507K, D551N, L552R, I553V, D578N, H676R, Q680R, D732G, E734G, E734K, and F749V.
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Specification