Competitive homogeneous assay
First Claim
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1. A method for assaying a sample for target polynucleotides comprising:
- (a) contacting sample with reagent under binding conditions wherein said reagent includes a first polynucleotide probe and a second polynucleotide probe, said first and second probes capable of assuming a first position wherein said first and second probes are bound to each other and at least one of said probes capable of assuming a second position wherein said probe strand is bound to said target, said first probe and second probe including a first label moiety associated with one of said probes and including a second label moiety associated with said opposite probe, said first and second label moieties capable of interacting via energy transfer when said first and second probes are bound to each other to produce a signal capable of detection characteristic of the probe in one of said two positions, said first label moiety located at the 3'"'"'-terminus of one of said probes and said second label moiety located at the 5'"'"'-terminus of said other probe; and
(b) monitoring said sample for said signal, the presence of which is related to the presence of target in said sample.
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Abstract
Methods and compositions for performing assays for target polynucleotide strands include contacting a sample with a reagent which includes a first and a second polynucleotide probe. The first and second probes are capable of assuming a first position wherein the probes are bound to each other and a second position wherein the probes are bound to a target. The probes include label moieties capable of interacting to produce a signal indicative of the probes being in one of the two positions.
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Citations
18 Claims
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1. A method for assaying a sample for target polynucleotides comprising:
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(a) contacting sample with reagent under binding conditions wherein said reagent includes a first polynucleotide probe and a second polynucleotide probe, said first and second probes capable of assuming a first position wherein said first and second probes are bound to each other and at least one of said probes capable of assuming a second position wherein said probe strand is bound to said target, said first probe and second probe including a first label moiety associated with one of said probes and including a second label moiety associated with said opposite probe, said first and second label moieties capable of interacting via energy transfer when said first and second probes are bound to each other to produce a signal capable of detection characteristic of the probe in one of said two positions, said first label moiety located at the 3'"'"'-terminus of one of said probes and said second label moiety located at the 5'"'"'-terminus of said other probe; and (b) monitoring said sample for said signal, the presence of which is related to the presence of target in said sample. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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- 14. A kit for assaying a sample for target polynucleotides comprising reagent, wherein said reagent includes a first polynucleotide probe and a second polynucleotide probe, said first and second probes capable of assuming a first position wherein said first and second probe are bound to each other and at least one of said probes capable of assuming a second position wherein said probe strand is bound to said target, said first probe and second probe including a first label moiety associated with one of said probes and including a second label moiety associated with said opposite probe, said first and second label moieties capable of interacting via energy transfer when said first and second probes are bound to each other to produce a signal capable of detection which is characteristic of the probe in one of said two positions, said first label moiety located at the 3'"'"'-terminus of one of said probes and said second label moiety located at the 5'"'"'-terminus of said other probe.
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18. A method for assaying a sample for target nucleic acid comprising;
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(a) contacting sample with reagent under binding conditions wherein said reagent includes a first nucleic acid probe and a second nucleic acid probe, said first and second probes capable of assuming a first position wherein said first and second probe are bound to each other and at least one of said probes capable of assuming a second position wherein said probe strand is bound to said target, said first probe and second probe including a first fluorophore label moiety associated with one of said probes and including a second fluorophore label moiety associated with said opposite probe, said first and second label moieties capable of interacting via energy transfer when said first and second probes are bound to each other to produce a signal capable of detection characteristic of the probe in one of said two positions, said first label moiety located at the 3'"'"'-terminus of one of said probes and said second label moiety located at the 5'"'"'-terminus of said other probe; and (b) monitoring said sample for said signal, the presence of which is related to the presence of target in said sample.
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Specification