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DNA polymerase having 3'-intrinsic editing activity

  • US 6,001,566 A
  • Filed: 05/31/1996
  • Issued: 12/14/1999
  • Est. Priority Date: 06/01/1995
  • Status: Expired due to Term
First Claim
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1. A method for determining the incorporation of at least one tagged dNTP into a double-stranded DNA product, comprising:

  • (a) providing, in a reaction vessel, a reaction solution comprising(i) a DNA template,(ii) at least one primer,(iii) a plurality of nucleotides comprising a plurality of dATP nucleotides, dTTP nucleotides, dCTP nucleotides and dGTP nucleotides, or analogues thereof, and at least one tagged dNTP of formula I, or an analogue thereof ##STR2## wherein;

    X is a bifunctional linkage group,Y is an activated group,B is selected from the group consisting of a purine, a pyrimidine, a deazapurine and a deazapyrimidine, and(iv) a thermophilic DNA polymerase which exhibits 3'"'"'-intrinsic editing activity;

    (b) synthesizing, in the reaction solution, a double-stranded DNA product in a polymerase chain reaction by sequentially adding to the at least one primer a plurality of nucleotides from step (a) which are complementary to the DNA template, the synthesizing step including incorporating the at least one tagged dNTP into the double-stranded DNA product and releasing the activated group from the at least one tagged dNTP concomitant to attaching to the at least one tagged dNTP one of the plurality of nucleotides from step (a) which is complementary to the DNA template, wherein said releasing step is effected by the DNA polymerase and is not effected by an additional enzyme, by radiation, or by an additional chemical; and

    (c) detecting the released activated group.

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