Dual labeled fluorescent probes
First Claim
1. An oligonucleotide probe having a 5′
- and 3′
end, comprising;
(a) a hairpin sequence that does not hybridize to a target nucleic acid and consisting of a stem and a loop;
(b) a target binding sequence that forms a hybrid with a target nucleic acid; and
, (c) an interactive pair of labels, consisting of a first and second member;
wherein said hairpin sequence and said target binding sequence are covalently linked, wherein said first member of said pair is attached between said hairpin sequence and said target binding sequence and wherein said second member of said pair is attached to said target binding sequence at the terminus distal to said hairpin sequence, wherein a detectable signal emitted by one of said pair of labels is substantially constant upon binding of said probe to target nucleic acid, and wherein said detectable signal increases by at least 2 fold upon cleavage of said probe between said pair.
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Accused Products
Abstract
The present invention relates to probes useful for the detection and measurement of target nucleic acids, as well as compositions and kits containing such probes. The probes of the present invention include an interactive pair of labels, as well as a hairpin sequence that does not hybridize to a target nucleic acid. According to the present invention, the probe generates a detectable signal indicative of a presence of a target nucleic acid. The detectable signal emitted by one of the pair of labels is substantially constant upon binding of the probe to target nucleic acid, and the detectable signal increases by at least 2 fold upon cleavage of the probe between the pair of labels.
11 Citations
56 Claims
-
1. An oligonucleotide probe having a 5′
- and 3′
end, comprising;
(a) a hairpin sequence that does not hybridize to a target nucleic acid and consisting of a stem and a loop;
(b) a target binding sequence that forms a hybrid with a target nucleic acid; and
,(c) an interactive pair of labels, consisting of a first and second member;
wherein said hairpin sequence and said target binding sequence are covalently linked, wherein said first member of said pair is attached between said hairpin sequence and said target binding sequence and wherein said second member of said pair is attached to said target binding sequence at the terminus distal to said hairpin sequence, wherein a detectable signal emitted by one of said pair of labels is substantially constant upon binding of said probe to target nucleic acid, and wherein said detectable signal increases by at least 2 fold upon cleavage of said probe between said pair. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56)
- and 3′
-
28. An oligonucleotide probe having a 5′
- and 3′
end, comprising;
(a) a hairpin sequence that does not hybridize to a target nucleic acid and consisting of a stem and a loop;
(b) a target binding sequence that forms a hybrid with a target nucleic acid; and
,(c) an interactive pair of labels, consisting of a first and second member;
wherein said hairpin sequence and said target binding sequence are covalently linked such that said hairpin sequence is positioned 5′
of said target binding sequence, wherein said first member of said pair is attached to the 3′
terminus of said target binding sequence and wherein said second member of said pair is attached to said oligonucleotide probe between said 3′
terminus and said hairpin sequence, and wherein a detectable signal emitted by one of said pair of labels is substantially constant upon binding of said probe to target nucleic acid, and wherein said signal increases by at least 2 fold upon cleavage of said probe between said pair.
- and 3′
-
29. An oligonucleotide probe having a 5′
- and 3′
end, comprising;
(a) a hairpin sequence that does not hybridize to a target nucleic acid and consisting of a stem and a loop;
(b) a target binding sequence that forms a hybrid with a target nucleic acid; and
,(c) an interactive pair of labels, consisting of a first and second member;
wherein said hairpin sequence and said target binding sequence are covalently linked such that said hairpin sequence is positioned 3′
of said target binding sequence;
wherein said first member of said pair is attached to the 5′
terminus of said target binding sequence and wherein said second member of said pair is attached to said oligonucleotide probe between the 3′
terminus of said target binding sequence and said hairpin sequence;
wherein a detectable signal emitted by one of said pair of labels is substantially constant upon binding of said probe to target nucleic acid; and
wherein said detectable signal increases by at least 2 fold upon cleavage of said probe between said pair.
- and 3′
Specification