Nucleotide-based probes and methods for the detection and quantification of macromolecules and other analytes
First Claim
Patent Images
1. A system for detecting one or more targets in a sample, the system comprising:
- (a) a first oligonucleotide configured to produce a detectable change in signal when bound by a target in a sample, wherein the first oligonucleotide comprises;
a first hybridization sequences;
a second hybridization sequence complementary to the first hybridization sequence such that a duplex is formed in the absence of the target;
a third hybridization sequence;
a fourth hybridization sequence;
a first signaling moiety attached to the first oligonucleotide, wherein the first signaling moiety comprises a fluorophore, a quencher, a nanoparticle, an electrochemical reporter, or an electrode; and
a second signaling moiety attached to the first oligonucleotide, wherein the second signaling moiety comprises a fluorophore, a quencher, a nanoparticle, an electrochemical reporter, or an electrode;
(b) a second oligonucleotide attached to a first target binding moiety and comprising a fifth hybridization sequence complementary to the third hybridization sequence, wherein the first target binding moiety is configured to specifically bind the target in the sample and comprises a protein, a polypeptide, a carbohydrate, a nucleic acid, a lipid, or a small molecule; and
(c) a third oligonucleotide attached to a second target binding moiety and comprising a sixth hybridization sequence complementary to the fourth hybridization sequence such that the second target binding moiety is positioned adjacent to the first target binding moiety in the absence of the target, wherein the second target binding moiety is configured to specifically bind the target in the sample and comprises a protein, a polypeptide, a carbohydrate, a nucleic acid, a lipid, or a small molecule,wherein in the presence of binding of the target to both the first target binding moiety and the second target binding moiety, formation of the duplex is inhibited such that the position of the first signaling moiety is changed relative to the second signaling moiety such that the first oligonucleotide produces a detectable change in signal.
2 Assignments
0 Petitions
Accused Products
Abstract
Provided are unimolecular oligonucleotide probes for detecting a target in a sample. The probes use target binding-induced structural changes to detect the presence of the target in the sample. Also provided are methods of using the probes to detect a target in a sample.
9 Citations
23 Claims
-
1. A system for detecting one or more targets in a sample, the system comprising:
-
(a) a first oligonucleotide configured to produce a detectable change in signal when bound by a target in a sample, wherein the first oligonucleotide comprises; a first hybridization sequences; a second hybridization sequence complementary to the first hybridization sequence such that a duplex is formed in the absence of the target; a third hybridization sequence; a fourth hybridization sequence; a first signaling moiety attached to the first oligonucleotide, wherein the first signaling moiety comprises a fluorophore, a quencher, a nanoparticle, an electrochemical reporter, or an electrode; and a second signaling moiety attached to the first oligonucleotide, wherein the second signaling moiety comprises a fluorophore, a quencher, a nanoparticle, an electrochemical reporter, or an electrode; (b) a second oligonucleotide attached to a first target binding moiety and comprising a fifth hybridization sequence complementary to the third hybridization sequence, wherein the first target binding moiety is configured to specifically bind the target in the sample and comprises a protein, a polypeptide, a carbohydrate, a nucleic acid, a lipid, or a small molecule; and (c) a third oligonucleotide attached to a second target binding moiety and comprising a sixth hybridization sequence complementary to the fourth hybridization sequence such that the second target binding moiety is positioned adjacent to the first target binding moiety in the absence of the target, wherein the second target binding moiety is configured to specifically bind the target in the sample and comprises a protein, a polypeptide, a carbohydrate, a nucleic acid, a lipid, or a small molecule, wherein in the presence of binding of the target to both the first target binding moiety and the second target binding moiety, formation of the duplex is inhibited such that the position of the first signaling moiety is changed relative to the second signaling moiety such that the first oligonucleotide produces a detectable change in signal. - 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)
-
Specification