DNA Polymerases and mutants thereof
First Claim
1. An isolated nucleic acid comprising a nucleotide sequence encoding a polypeptide comprising an amino acid sequence that is at least 80% identical to forty contiguous amino acids disclosed in any one of Tables 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, or 24, wherein the polypeptide has a nucleotide polymerase activity.
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Abstract
The present invention provides polypeptides having a nucleotide polymerase activity and method of enhancing polymerase activity. The polypeptides of the present invention may posses both a DNA-dependent DNA polymerase activity and an RNA-dependent DNA polymerase activity, i.e., a reverse transcriptase activity. The polypeptides of the present invention may be used in any application including, but not limited to, DNA sequencing reactions, amplification reactions, cDNA synthesis reactions, and combined cDNA synthesis and amplification reactions, e.g., RT-PCR.
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Citations
122 Claims
- 1. An isolated nucleic acid comprising a nucleotide sequence encoding a polypeptide comprising an amino acid sequence that is at least 80% identical to forty contiguous amino acids disclosed in any one of Tables 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, or 24, wherein the polypeptide has a nucleotide polymerase activity.
- 3. An isolated nucleic acid comprising a nucleotide sequence that hybridizes under stringent conditions to a nucleic acid comprising a sequence complementary to a sequence of any one of Tables 1, 3 5, 7, 9, 11, 13, 15, 17, 19, 21, or 23, and encodes a polypeptide having a nucleotide polymerase activity.
- 6. A polypeptide comprising an amino acid sequence that is at least 80% identical to forty contiguous amino acids disclosed in any one of Tables 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, or 24, and mutants, fragments and fragments of mutants thereof wherein the polypeptide, mutant, fragment or fragment of mutant has a nucleotide polymerase activity.
- 78. A polypeptide having a sequence in Table 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, or 24, and fragments thereof, wherein the polypeptide has a substitution of an amino acid corresponding to Arg at position 724 of the polymerase in Table 2 with an amino acid selected from the group consisting of Asp, Glu, Ala, Val, Leu, Ile, Pro, Met, Phe, Trp, Gly, Ser, Thr, Cys, Tyr, Gln, Asn, Lys, and His.
- 98. A nucleic acid polymerase having an RNA-dependent DNA polymerase activity, wherein the activity occurs in the presence of manganese and/or magnesium.
- 99. A nucleic acid polymerase having an RNA-dependent DNA polymerase activity, wherein the activity occurs in the presence of a manganese/magnesium ratio>
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103. A nucleic acid polymerase having a DNA-dependent DNA polymerase activity, wherein the activity occurs in the presence of manganese and/or magnesium.
- 104. A nucleic acid polymerase having a DNA-dependent DNA polymerase activity, wherein the activity occurs in the presence of a manganese/magnesium ratio>
- 114. A polypeptide having an RNA-dependent DNA polymerase specific activity and a DNA-dependent DNA polymerase specific activity, wherein the ratio of RNA-dependent DNA polymerase specific activity to DNA-dependent DNA polymerase specific activity is greater than about 0.05.
- 117. A polypeptide having an RNA-dependent DNA polymerase specific activity and a DNA-dependent DNA polymerase specific activity, wherein the RNA-dependent specific activity is greater than about 500 units/mg polypeptide.
Specification