Method for amplifying a polynucleotide
First Claim
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1. A method of amplifying a target nucleic acid in a sample comprising the steps of:
- (a) providing the target nucleic acid of the sample as single-stranded nucleic acid;
(b) combining with the sample at least one oligonucleotide, wherein the oligonucleotide or oligonucleotides include a double-stranded promoter, a single-stranded segment of nucleic acid complementary to a segment of the target nucleic acid, and a homopolynucleotide;
(c) annealing oligonucleotide(s) comprising the double-stranded promoter, complementary segment and homopolynucleotide to the target nucleic acid; and
(d) adding an RNA polymerase and ribonucleoside triphosphates or analogs thereof, thereby generating transcripts.
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Abstract
In one aspect, the present invention relates to methods of amplifying a target nucleic acid, the methods involving the production of a double-stranded promoter to provide for transcription of the target sequence, and the provision of a poly-A tail in the transcription product. In another aspect, the present invention relates to methods of detecting a target nucleic acid in a sample.
97 Citations
30 Claims
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1. A method of amplifying a target nucleic acid in a sample comprising the steps of:
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(a) providing the target nucleic acid of the sample as single-stranded nucleic acid; (b) combining with the sample at least one oligonucleotide, wherein the oligonucleotide or oligonucleotides include a double-stranded promoter, a single-stranded segment of nucleic acid complementary to a segment of the target nucleic acid, and a homopolynucleotide; (c) annealing oligonucleotide(s) comprising the double-stranded promoter, complementary segment and homopolynucleotide to the target nucleic acid; and (d) adding an RNA polymerase and ribonucleoside triphosphates or analogs thereof, thereby generating transcripts. - View Dependent Claims (2, 3, 4, 5, 7, 8, 9, 10, 11, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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6. A method of amplifying a target nucleic acid in a sample comprising the steps of:
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(a) providing the target nucleic acid of the sample as single-stranded nucleic acid; (b) combining with the sample at least one oligonucleotide, wherein the oligonucleotide or oligonucleotides include a double-stranded promoter, a single-stranded segment of nucleic acid complementary to a segment of the target nucleic acid, and a homopolynucleotide; (c) annealing oligonucleotide(s) comprising the double-stranded promoter, complementary segment and homopolynucleotide the target nucleic acid; (d) adding an RNA polymerase and ribonucleoside triphosphates or analogs thereof, thereby generating the complement of the complementary segment and homopolynucleotide, and (e) detecting the complementary polynucleotide which is produced as a transcript in step (d), and wherein detection comprises; (i) providing the homopolynucleotide attached to a solid substrate; (ii) combining the substrate-attached homopolynucleotide and the polynucleotide to be detected under conditions that promote hybridization therebetween; and (iii) detecting the polynucleotide to be detected associated with the solid substrate. - View Dependent Claims (29)
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12. A method of amplifying a target nucleic acid in a sample comprising the steps of:
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(a) providing the target nucleic acid of the sample as single-stranded nucleic acid; (b) combining with the sample at least one oligonucleotide, wherein the oligonucleotide or oligonucleotides include a double-stranded promoter, a single-stranded segment of nucleic acid complementary to a segment of the target nucleic acid, and a homopolynucleotide; (c) annealing oligonucleotide(s) comprising the double-stranded promoter, complementary segment and homopolynucleotide to the target nucleic acid; and (d) adding an RNA polymerase and ribonucleoside triphosphates or analogs thereof, thereby generating the complement of the complementary segment and homopolynucleotide, wherein the target nucleic acid has a first and a second sequence on the same strand, said first and second sequences being contiguous; and
wherein the oligonucleotides in step (b) comprises at least three oligonucleotides, the three oligonucleotides comprising;(i) a first oligonucleotide including a promoter and a first segment of nucleic acid complementary to the first sequence on the target nucleic acid; (ii) a second oligonucleotide including a segment of nucleic acid complementary to the promoter of the first oligonucleotide; (iii) and a third oligonucleotide including a segment of nucleic acid complementary to the second sequence on the target nucleic acid and the homopolynucleotide. - View Dependent Claims (13)
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30. A method of detecting a target nucleic acid in a sample comprising the steps of:
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(a) providing the nucleic acid of the sample as single-stranded nucleic acid; (b) combining with the sample (i) at least one first oligonucleotide, wherein the at least one first oligonucleotide can form a double-stranded promoter which is joined to a first single-stranded segment of nucleic acid complementary to a first segment of the target nucleic acid, and (ii) a second oligonucleotide that includes a second single-stranded segment of nucleic acid complementary to a second segment of the target nucleic acid which is adjacent to the first segment of the target nucleic acid, wherein the second oligonucleotide comprises a homopolynucleotide label; (c) contacting the oligonucleotides comprising the first and second single-stranded segments with the sample nucleic acid and, if the target nucleic acid is present, ligating the first and second single-stranded segments; and (d) forming the double-stranded promoter and, if the ligation of step (c) has occurred, catalyzing with an RNA polymerase the formation of a nucleic acid segment complementary to the first and second single-stranded segments and the homopolynucleotide label.
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Specification