Methods and compositions for use in high fidelity polymerase chain reaction
First Claim
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1. A method of performing a high fidelity polymerase chain reaction (PCR), said method comprising:
- (a) contacting a template DNA nucleic acid with a PCR reagent mixture that comprises both a Family A polymerase and a Family B polymerase and provides for an error frequency rate that does not exceed 1.3×
10-6 mutations per base pair per PCR cycle; and
(b) performing a plurality of reaction cycles, wherein each cycle comprises;
(i) denaturation;
(ii) annealing; and
(iii) polymerization;
whereby a polymerase chain reaction is performed in which the error frequency rate does not exceed 1.3×
10-6 mutations per base pair per PCR cycle.
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Abstract
Methods and compositions are provided for performing high fidelity polymerase chain reactions. In the subject methods, primer extension products are produced with a low error frequency rate through the use of at least one of unequal concentrations of dNTPs or a melting point reducing agent. Also provided are kits and reagent mixtures for use in the subject methods. The subject invention finds use in a variety of applications, particularly in applications where high fidelity PCR is desired.
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Citations
29 Claims
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1. A method of performing a high fidelity polymerase chain reaction (PCR), said method comprising:
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(a) contacting a template DNA nucleic acid with a PCR reagent mixture that comprises both a Family A polymerase and a Family B polymerase and provides for an error frequency rate that does not exceed 1.3×
10-6 mutations per base pair per PCR cycle; and(b) performing a plurality of reaction cycles, wherein each cycle comprises; (i) denaturation; (ii) annealing; and (iii) polymerization; whereby a polymerase chain reaction is performed in which the error frequency rate does not exceed 1.3×
10-6 mutations per base pair per PCR cycle. - View Dependent Claims (2, 3)
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4. A method of performing a high fidelity polymerase chain reaction (PCR), said method comprising:
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(a) contacting a template nucleic acid with primer and a reagent mixture comprising at least one Family A and Family B polymerase and at least one of;
unequal amounts of dNTPs and a melting point reducing agent, wherein said reagent mixture provides for an error frequency rate that does not exceed 1.3×
10-6 mutations per base pair per PCR cycle; and(b) performing a plurality of reaction cycles, wherein each cycle comprises; (i) a denaturation; (ii) annealing; and (iii) polymerization whereby a polymerase chain reaction is performed in which the error frequency rate does not exceed 1.3×
10-6 mutations per base pair per PCR cycle. - View Dependent Claims (5, 6, 7)
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8. A method of performing a high fidelity polymerase chain reaction (PCR), said method comprising:
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(a) contacting a template DNA with primer and a reagent mixture that provides for an error frequency rate that does not exceed 1.3×
10-6 mutations per base pair per PCR cycle, wherein said reagent mixture comprises;(i) at least one Family A and Family B polymerase; (ii) unequal concentrations of dNTPs; and (iii) urea; and (b) performing a plurality of reaction cycles, wherein each cycle comprises; (i) denaturation; (ii) annealing; and (iii) polymerization; whereby a polymerase chain reaction is performed in which the error frequency rate does not exceed 1.3×
10-6 mutations per base pair per PCR cycle. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A method of performing a high fidelity polymerase chain reaction (PCR), said method comprising:
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(a) contacting a template DNA with primer and reagents to produce a reaction mixture that provides for an error frequency rate that does not exceed 1.3×
10-6 mutations per base pair per PCR cycle, wherein said reagents comprise;(i) a Family A polymerase and Deep Vent polymerase, wherein said Family A polymerase is present in an amount greater than said Deep Vent polymerase; and (ii) unequal concentrations of dNTPs, wherein said unequal concentrations of dNTPs are characterized by at least one of a greater amount of dATP and a lesser amount of dGTP with respect to the remaining dNTPs; and (b) performing from about 5 to 40 reaction cycles, wherein each cycle comprises; (i) denaturation; (ii) annealing; and (iii) polymerization; whereby a polymerase chain reaction is performed in which the error frequency rate does not exceed 1.3×
10-6 mutations per base pair per PCR cycle. - View Dependent Claims (16, 17)
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18. A reagent mixture for use in high fidelity polymerase chain reactions, said mixture comprising
(a) at least one Family A polymerase; -
(b) at least one Family B polymerase; and (c) urea. - View Dependent Claims (19, 20, 21, 22)
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23. A reagent mixture for use in high fidelity polymerase chain reactions, said mixture comprising:
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(a) a Family A polymerase and Deep Vent polymerase, wherein said Family A polymerase is present in amount greater than said Deep Vent polymerase; (b) unequal concentrations of dNTPS, wherein said unequal concentrations of dNTPs are characterized by at least one of a greater amount of dATP and a lesser amount of dGTP with respect to the remaining dNTPs. (c) urea in an amount ranging from about 20 to 500 mM.
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24. A kit for use in performing high fidelity polymerase chain reactions, said kit comprising:
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(a) at least one Family A polymerase; (b) at least one Family B polymerase; and (c) urea. - View Dependent Claims (25, 26, 27, 28)
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29. A kit for use in high fidelity polymerase chain reactions, said kit comprising:
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(a) a Family A polymerase and Deep Vent polymerase, wherein said Family A polymerase is present in amount greater than said Deep Vent polymerase; (b) unequal concentrations of dNTPs, wherein said unequal concentrations of dNTPs are characterized by at least one of a greater amount of dATP and a lesser amount of dGTP with respect to the remaining dNTPs; and (c) urea in an amount ranging from about 20 to 500 mM.
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Specification