Cloned DNA polymerases from Thermotoga neapolitana
First Claim
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1. A method of synthesizing a double-stranded DNA molecule comprising:
- (a) hybridizing a primer to a first DNA molecule; and
(b) incubating said DNA molecule of (a) in the presence of one or more deoxyribonucleoside triphosphates and Tne DNA polymerase, wherein said Tne DNA polymerase is a Pol I type DNA polymerase, under conditions sufficient to synthesize a second DNA molecule complementary to all or a portion of said first DNA molecule.
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Abstract
The invention relates to a substantially pure thermostable DNA polymerase from Thermotoga neapolitana (Tne). The Tne DNA polymerase has a molecular weight of about 100 kilodaltons and is more thermostable than Taq DNA polymerase. The present invention also relates to the cloning and expression of the Tne DNA polymerase in E. coli, to DNA molecules containing the cloned gene, and to host cells which express said genes. The Tne DNA polymerase of the invention may be used in well-known DNA sequencing and amplification reactions.
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Citations
31 Claims
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1. A method of synthesizing a double-stranded DNA molecule comprising:
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(a) hybridizing a primer to a first DNA molecule; and
(b) incubating said DNA molecule of (a) in the presence of one or more deoxyribonucleoside triphosphates and Tne DNA polymerase, wherein said Tne DNA polymerase is a Pol I type DNA polymerase, under conditions sufficient to synthesize a second DNA molecule complementary to all or a portion of said first DNA molecule. - View Dependent Claims (2, 3, 4, 5, 6, 23, 24, 25, 29)
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7. A method of sequencing a DNA molecule, comprising
(a) hybridzing a primer to a first DNA molecule; -
(b) contacting said DNA molecule of step (a) with deoxyribonucleoside triphosphates, Tne DNA polymerase, wherein said Tne DNA polymerase is a Pol I type DNA polymerase, and a terminator nucleotide;
(c) incubating the mixture of step (b) under conditions sufficient to synthesize a random population of DNA molecules complementary to said first DNA molecule, wherein said synthesized DNA molecules are shorter in length than said first DNA molecule and wherein said synthesized DNA molecules comprise a terminator nucleotide at their 3′
termnini; and
(d) separating said synthesized DNA molecules by size so that at least a part of the nucleotide sequence of said first DNA molecule can be determined. - View Dependent Claims (8, 9, 10, 11, 12, 26, 30)
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13. A method of amplifying a double stranded DNA molecule, comprising:
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(a) providing a first and second primer, wherein said first primer is complementary to a sequence at or near the 3′
-termini of the first strand of said DNA molecule and said second primer is complementary to a sequence at or near the 3′
-termini of the second strand of said DNA molecule;
(b) hybridizing said first primer to said first strand and said second primer to said second strand in the presence of Tne DNA polymerase, wherein said Tne DNA polymerase is a Pol I type DNA polymerase, under conditions such that a third DNA molecule complementary to said first strand and a fourth DNA molecule complementary to said second strand are synthesized;
(c) denaturing said first and third strand, and said second and fourth strands with heat; and
(d) repeating steps (a) to (c) one or more times. - View Dependent Claims (14, 15, 16, 31)
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17. A kit for sequencing a DNA molecule, comprising:
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(a) a first container means comprising a Tne DNA polymerase, wherein said Tne DNA polymerase is a Pol I type DNA polymerase (b) a second container means comprising one or more dideoxyribonucleoside triphosphates; and
(c) a third container means comprising one or more deoxyribonucleoside triphosphates. - View Dependent Claims (18, 19, 27)
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20. A kit for amplifying a DNA molecule, comprising:
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(a) a first container means comprising a Tne DNA polymerase, wherein said Tne DNA polymerase is a Pol I type polymerase, and (b) a second container means comprising one or more deoxyribonucleoside triphosphates. - View Dependent Claims (21, 22, 28)
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Specification