Rolling circle amplification method
First Claim
1. A method of detecting and/or analyzing a nucleic acid molecule, said method comprising:
- performing a rolling circle amplification (RCA) reaction comprising at least two rounds of RCA, wherein said reaction comprises;
(a) providing a concatemeric first RCA product comprising a multiplicity of monomer repeats, each repeat representing a complementary copy of a first RCA template, wherein said nucleic acid molecule to be detected and/or analyzed, or its complement, is contained in said first RCA template;
(b) cleaving the first RCA product into monomer units, wherein the monomer unit is reduced in size as compared to the monomer repeat of the first RCA product;
(c) circularizing monomer units resulting from said cleavage to form second RCA templates wherein the second RCA template is smaller than the first RCA template; and
(d) performing a second RCA reaction using said second RCA template of (c) and a primer for said second RCA, to form a second RCA product;
wherein any one or more of steps (a) to (d) may be performed sequentially or in combination; and
detecting and/or analyzing said second RCA product and/or a monomer unit derived therefrom.
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Abstract
A method for performing a rolling circle amplification (RCA) reaction includes at least two rounds of RCA. The method includes providing a concatemeric first RCA product having a multiplicity of monomer repeats, each repeat representing a complementary copy of a first RCA template, wherein the nucleic acid molecule to be detected and/or analyzed, or its compliment, is contained in the first RCA template. The first RCA product is cleaved into monomer units which are reduced in size compared to the monomer repeat of the first RCA template. Monomer units resulting from the cleavage are circularized to form second RCA templates, which are smaller than the first RCA template. A second RCA reaction is performed on the second RCA template and a primer for the second RCA to form a second RCA product. The second RCA product, or a monomer unit derived from it, is detected or analyzed.
31 Citations
34 Claims
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1. A method of detecting and/or analyzing a nucleic acid molecule, said method comprising:
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performing a rolling circle amplification (RCA) reaction comprising at least two rounds of RCA, wherein said reaction comprises; (a) providing a concatemeric first RCA product comprising a multiplicity of monomer repeats, each repeat representing a complementary copy of a first RCA template, wherein said nucleic acid molecule to be detected and/or analyzed, or its complement, is contained in said first RCA template; (b) cleaving the first RCA product into monomer units, wherein the monomer unit is reduced in size as compared to the monomer repeat of the first RCA product; (c) circularizing monomer units resulting from said cleavage to form second RCA templates wherein the second RCA template is smaller than the first RCA template; and (d) performing a second RCA reaction using said second RCA template of (c) and a primer for said second RCA, to form a second RCA product; wherein any one or more of steps (a) to (d) may be performed sequentially or in combination; and detecting and/or analyzing said second RCA product and/or a monomer unit derived therefrom. - 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, 28, 29, 30, 31, 32, 33, 34)
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Specification