Thermostable DNA polymerases
First Claim
1. An enzymatically active DNA polymerase comprising 561 amino acids having a tyrosine residue at an amino acid position corresponding to Taq DNA polymerase residue 667 in its dNMP binding site, wherein said polymerase lacks 5'"'"' to 3'"'"' exonuclease activity as a result of an N-terminal deletion, and wherein said polymerase is substantially identical to the DNA polymerase of Thermus aquaticus, Thermus flavus or Thermus thermophilus, and wherein said polymerase forms a single polypeptide band on an SDS polyacrylamide gel.
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Abstract
An enzymatically active DNA polymerase having between 540 and 582 amino acids having a tyrosine at a position equivalent to position 667 of Taq DNA polymerase, wherein said polymerase lacks 5'"'"' to 3'"'"' exonuclease activity, and wherein said polymerase has at least 95% homology in its amino acid sequence to the DNA polymerase of Thermus aquaticus, Thermus flavus or Thermus thermophilus, and wherein said polymerase forms a single polypeptide band on an SDS PAGE.
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Citations
22 Claims
- 1. An enzymatically active DNA polymerase comprising 561 amino acids having a tyrosine residue at an amino acid position corresponding to Taq DNA polymerase residue 667 in its dNMP binding site, wherein said polymerase lacks 5'"'"' to 3'"'"' exonuclease activity as a result of an N-terminal deletion, and wherein said polymerase is substantially identical to the DNA polymerase of Thermus aquaticus, Thermus flavus or Thermus thermophilus, and wherein said polymerase forms a single polypeptide band on an SDS polyacrylamide gel.
- 2. An enzymatically active DNA polymerase comprising 562 amino acids having a tyrosine residue at an amino acid position corresponding to Taq DNA polymerase residue 667 in its dNMP binding site, wherein said polymerase lacks 5'"'"' to 3'"'"' exonuclease activity as a result of an N-terminal deletion, and wherein said polymerase is substantially identical to the DNA polymerase of Thermus aquaticus, Thermus flavus or Thermus thermophilus, and wherein said polymerase forms a single polypeptide band on an SDS polyacrylamide gel.
Specification