DNA sequencing
First Claim
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1. A method for determining the nucleotide base sequence of a DNA molecule, comprising:
- providing said DNA molecule annealed with a primer molecule able to hybridize to said DNA molecule;
incubating the annealed molecules in a vessel containing four different deoxynucleoside triphosphates, a processive DNA polymerase, wherein said polymerase is able to remain bound for at least 500 bases to said DNA molecule in an environmental condition used in the extension reaction of a DNA sequencing reaction, said polymerase having less than 500 units of exonuclease activity per mg of said polymerase, and one of four DNA synthesis terminating agents which terminate DNA synthesis at a specific nucleotide base, wherein each said agent terminates DNA synthesis at a different nucleotide base, andseparating the DNA products of the incubating reaction according to their size, whereby at least a part of the nucleotide base sequence of said DNA molecule can be determined.
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Abstract
This invention relates to processive DNA polymerases and methods for using them.
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Citations
44 Claims
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1. A method for determining the nucleotide base sequence of a DNA molecule, comprising:
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providing said DNA molecule annealed with a primer molecule able to hybridize to said DNA molecule; incubating the annealed molecules in a vessel containing four different deoxynucleoside triphosphates, a processive DNA polymerase, wherein said polymerase is able to remain bound for at least 500 bases to said DNA molecule in an environmental condition used in the extension reaction of a DNA sequencing reaction, said polymerase having less than 500 units of exonuclease activity per mg of said polymerase, and one of four DNA synthesis terminating agents which terminate DNA synthesis at a specific nucleotide base, wherein each said agent terminates DNA synthesis at a different nucleotide base, and separating the DNA products of the incubating reaction according to their size, whereby at least a part of the nucleotide base sequence of said DNA molecule can be determined. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 23, 39)
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22. A kit for DNA sequencing, comprising:
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a processive DNA polymerase, said polymerase having less than 500 units of exonuclease activity per mg of polymerase, said polymerase being able to exhibit its processivity in an environmental condition normally used in the extension reaction of a DNA sequencing reaction, and a reagent necessary for said sequencing, selected from the group consisting of (a) dITP and (b) a chain terminating agent. - View Dependent Claims (24, 25)
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26. A method for determining the nucleotide base sequence of a DNA molecule, comprising:
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providing said DNA molecule annealed with a primer molecule able to hybridize to said DNA molecule; incubating the annealed molecules in the presence of four different deoxynucleoside triphosphates, a processive DNA polymerase, wherein said polymerase is able to remain bound for at least 500 bases to said DNA molecule in an environmental condition used in the extension reaction of a DNA sequencing reaction, said polymerase having less than 50% of the exonuclease activity of the naturally associated level of exonuclease activity of said polymerase, and a DNA synthesis terminating agent which terminates DNA synthesis at a specific nucleotide base, and separating the DNA products of the incubating reaction according to their size, whereby at least a part of the nucleotide base sequence of said DNA molecule can be determined. - View Dependent Claims (27, 28, 29, 30, 31)
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32. A kit for DNA sequencing, comprising:
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a processive DNA polymerase which remains bound to a DNA molecule for at least 500 bases before dissociating, said polymerase having less than 50% of the exonuclease activity of the naturally associated level of exonuclease activity of said polymerase, said polymerase being able to exhibit its processivity in an environmental condition normally used in the extension reaction of a DNA sequencing reaction, and a reagent necessary for said sequencing, selected from the group consisting of (a) deoxyinosine triphosphate and (b) a chain terminating agent. - View Dependent Claims (33, 34, 35, 36, 37)
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38. A method for determining the nucleotide base sequence of a DNA molecule, comprising:
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providing said DNA molecule annealed with a primer molecule able to hybridize to said DNA molecule; incubating the annealed molecules in the presence of four deoxynucleoside triphosphates, a processive DNA polymerase, wherein said polymerase is able to remain bound for at least 500 bases to said DNA molecule in an environmental condition used in the extension reaction of a DNA sequencing reaction, said polymerase having a level of exonuclease activity which is sufficiently low to permit the nucleotide base sequence of the DNA molecule to be determined, and a DNA synthesis terminating agent which terminates DNA synthesis at a specific nucleotide base, and separating the DNA products of the incubating reaction according to their size, whereby at least a part of the nucleotide base sequence of said DNA molecule can be determined.
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40. A kit for DNA sequencing, comprising:
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a processive DNA polymerase which remains bound to a DNA molecule for at least 500 bases before dissociating, said polymerase having a level of exonuclease activity which is sufficiently low to permit the nucleotide base sequence of the DNA molecule to be determined, said polymerase being able to exhibit its processivity in an environmental condition normally used in the extension reaction of a DNA sequencing reaction, and a reagent necessary for said sequencing, selected from the group consisting of (a) deoxyinosine triphosphate (b) a chain terminating agent.
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41. A method for determining the nucleotide base sequence of a DNA molecule, comprising:
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providing said DNA molecule annealed with a primer molecule able to hybridize to said DNA molecule; incubating the annealed primer molecule and the DNA molecule in the presence of at least four deoxynucleotide triphosphates, a T7-type DNA polymerase having less than 500 units of exonuclease activity per mg of said polymerase, and a DNA synthesis terminating agent which terminates DNA synthesis at a specific nucleotide base; separating the DNA products of the incubating reaction according to their size, whereby at least a part of the nucleotide base sequence of said DNA molecule can be determined. - View Dependent Claims (42)
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43. A kit for DNA sequencing, comprising:
- a T7-type DNA polymerase having less than 500 units of exonuclease activity per mg of polymerase, and a reagent selected from the group consisting of dITP, and a chain terminating agent.
- View Dependent Claims (44)
Specification