Methods for obtaining thermostable enzymes, DNA polymerase I variants from Thermus aquaticus having new catalytic activities, methods for obtaining the same, and applications of the same
First Claim
Patent Images
1. A purified polynucleotide which encodes a thermostable polypeptide comprising an amino acid sequence having at least 85% identity to residues 13-555 of SEQ ID NO:
- 26, wherein said polypeptide has (a) a mutation at E465, (b) a mutation at M470 wherein said mutation at M470 is not M470R, or (c) a mutation at M470 and a mutation at E465.
1 Assignment
0 Petitions
Accused Products
Abstract
The present invention provides a method for obtaining thermostable enzymes. The present invention also provides variants of DNA polymerase I from Thermus aquaticus. The present invention further provides methods of identifying mutant DNA polymerases having enhanced catalytic activity. The present invention also provides polynucleotides, expression systems, and host cells encoding the mutant DNA polymerases. Still further, the present invention provides a method to carry out reverse transcriptase-polymerase chain reaction (RT-PCR) and kits to facilitate the same.
12 Citations
31 Claims
-
1. A purified polynucleotide which encodes a thermostable polypeptide comprising an amino acid sequence having at least 85% identity to residues 13-555 of SEQ ID NO:
- 26, wherein said polypeptide has (a) a mutation at E465, (b) a mutation at M470 wherein said mutation at M470 is not M470R, or (c) a mutation at M470 and a mutation at E465.
- 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. A purified polynucleotide which encodes a thermostable polypeptide comprising an amino acid sequence having at least 85% identity to residues 13-555 of SEQ ID NO:
- 26, wherein said polypeptide has a mutation at M470 and further comprises at least one mutation selected from the group consisting of H203R, F205L, T232S, E253G, Q257R, D274G, L275H, L275P, I276F, V309I, I322N, A331V, S335N, I361F, R374Q, A384T, T387A, Y419C, Y419N, F472Y, F472S, A487T, K490E, P493T, M498T, G499E, M502K, L503P, V506I, R518G, A523V, A526V, P5395, E543K, and W550R.
- View Dependent Claims (29, 30, 31)
Specification