Methods for detecting target nucleic acid sequences
First Claim
1. A method for the detection of a target nucleic acid, which method comprises:
- (a) bringing together in a nucleic acid hybridization medium (i) nucleic acid from a sample, said nucleic acid comprising a template nucleic acid sequence and a target nucleic acid sequence, and (ii) a tailed nucleic acid primer comprising, in 5′
to 3′
order, a template binding region and a tail comprising a linker and a target binding region, in the presence of appropriate nucleoside triphosphates and an agent for polymerization thereof, under conditions such that the template binding region of the primer will hybridize to a complementary sequence in the template nucleic acid and be extended to form a primer extension product, the tail of the nucleic acid primer remaining uncopied during amplification, and (b) separating any said product from the template, whereupon the target binding region in the tail of the primer will hybridize to a sequence in the primer extension product complementary to the target nucleic acid, and wherein any such target specific hybridization is detected via a detectable change in a signalling system, such that the presence or absence of the target nucleic acid in the sample is detected by reference to the presence or absence of a detectable change in the signalling system.
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Abstract
A method for the detection of a target nucleic acid, which method comprises contacting template nucleic acid from a sample with (i) a signalling system and (ii) a tailed nucleic acid primer having a template binding region and the tail comprising a linker and a target binding region, in the presence of appropriate nucleoside triphosphates and an agent for polymerization thereof, under conditions such that the template binding region of the primer will hybridize to a complementary sequence in the template nucleic acid and be extended to form a primer extension product, separating any such product from the template whereupon the target binding region in the tail of the primer will hybridize to a sequence in the primer extension product corresponding to the target nucleic acid, and wherein any such target specific hybridization causes a detectable change in the signalling system, such that the presence or absence of the target nucleic acid in the sample is detected by reference to the presence or absence of a detectable change in the signalling system.
212 Citations
9 Claims
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1. A method for the detection of a target nucleic acid, which method comprises:
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(a) bringing together in a nucleic acid hybridization medium (i) nucleic acid from a sample, said nucleic acid comprising a template nucleic acid sequence and a target nucleic acid sequence, and (ii) a tailed nucleic acid primer comprising, in 5′
to 3′
order, a template binding region and a tail comprising a linker and a target binding region, in the presence of appropriate nucleoside triphosphates and an agent for polymerization thereof, under conditions such that the template binding region of the primer will hybridize to a complementary sequence in the template nucleic acid and be extended to form a primer extension product, the tail of the nucleic acid primer remaining uncopied during amplification, and(b) separating any said product from the template, whereupon the target binding region in the tail of the primer will hybridize to a sequence in the primer extension product complementary to the target nucleic acid, and wherein any such target specific hybridization is detected via a detectable change in a signalling system, such that the presence or absence of the target nucleic acid in the sample is detected by reference to the presence or absence of a detectable change in the signalling system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification