Methods for identifying low-abundance polynucleotides and related compositions
First Claim
1. A subtractive hybridization method for identifying one or more polynucleotides in a test sample that are absent from, or less abundant in, a reference sample, said method comprising:
- a) providing high-abundance enriched polynucleotide strands of, or prepared from, a pool of test or reference polynucleotides that is enriched in high-abundance polynucleotide sequences relative to a test or reference polynucleotide sample, respectively;
b) contacting the high-abundance enriched polynucleotide strands with test polynucleotide strands of, or prepared from, the test polynucleotide sample under hybridization conditions to form a first hybridization mixture, thereby producing unhybridized test polynucleotide strands that are enriched in low-abundance polynucleotide sequences relative to the test polynucleotide sample;
c) synthesizing polynucleotide strands from the unhybridized test polynucleotide strands, thereby producing low-abundance enriched test polynucleotide strands;
d) providing low-abundance-enriched reference polynucleotide stands of, or prepared from, a reference pool of polynucleotides that is enriched in low-abundance polynucleotide sequences relative to the reference polynucleotide sample;
e) contacting the low-abundance enriched reference polynucleotide strands with the low-abundance enriched test polynucleotide strands under hybridization conditions to form a second hybridization mixture, thereby producing hybrid duplexes, unhybridized low-abundance enriched reference polynucleotide strands, and unhybridized low-abundance enriched test polynucleotide strands;
f) removing or digesting the hybrid duplexes; and
g) producing test-specific duplexes from the unhybridized low-abundance enriched test polynucleotide strands.
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Abstract
This invention provides novel methods for producing a plurality of polynucleotides prepared from a polynucleotide sample and the plurality of polynucleotides so produced. In one embodiment, the plurality of polynucleotides is prepared by subtractive hybridization between test and reference polynucleotide samples and is substantially enriched in sequences that are either not present in the reference polynucleotide sample or are present in the reference polynucleotide sample in substantially lower concentration than in the test polynucleotide sample. The plurality of polynucleotides is also substantially enriched in low-abundance sequences, relative to the test polynucleotide sample. The invention also provides kits useful in the methods of the invention and for using the polynucleotides produced thereby. The polynucleotides are useful in a wide variety of applications, such as cloning, expression, and hybridization studies.
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Citations
94 Claims
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1. A subtractive hybridization method for identifying one or more polynucleotides in a test sample that are absent from, or less abundant in, a reference sample, said method comprising:
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a) providing high-abundance enriched polynucleotide strands of, or prepared from, a pool of test or reference polynucleotides that is enriched in high-abundance polynucleotide sequences relative to a test or reference polynucleotide sample, respectively;
b) contacting the high-abundance enriched polynucleotide strands with test polynucleotide strands of, or prepared from, the test polynucleotide sample under hybridization conditions to form a first hybridization mixture, thereby producing unhybridized test polynucleotide strands that are enriched in low-abundance polynucleotide sequences relative to the test polynucleotide sample;
c) synthesizing polynucleotide strands from the unhybridized test polynucleotide strands, thereby producing low-abundance enriched test polynucleotide strands;
d) providing low-abundance-enriched reference polynucleotide stands of, or prepared from, a reference pool of polynucleotides that is enriched in low-abundance polynucleotide sequences relative to the reference polynucleotide sample;
e) contacting the low-abundance enriched reference polynucleotide strands with the low-abundance enriched test polynucleotide strands under hybridization conditions to form a second hybridization mixture, thereby producing hybrid duplexes, unhybridized low-abundance enriched reference polynucleotide strands, and unhybridized low-abundance enriched test polynucleotide strands;
f) removing or digesting the hybrid duplexes; and
g) producing test-specific duplexes from the unhybridized low-abundance enriched test polynucleotide strands. - 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, 35, 36, 37, 38, 42, 43, 44, 45, 46, 47, 48)
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- 39. A method for functionally isolating single-stranded polynucleotides in a mixture of single- and double-stranded polynucleotides, said method comprising contacting a mixture of single- and double-stranded polynucleotides with one or more restriction endonucleases under conditions sufficient to allow digestion of double-stranded polynucleotides to a form that cannot serve as a template for a nucleotide synthesis reaction that uses the single-stranded polynucleotides as a template.
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49. A method for preparing a selected polynucleotide pool from a polynucleotide sample comprising:
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a) synthesizing first antisense polynucleotide strands from sense polynucleotides of, or prepared from, the polynucleotide sample using an antisense primer complex comprising an antisense primer operably linked to an RNA promoter sequence, wherein the RNA promoter sequence is 5′
of the antisense primer;
b) adding a universal primer site to the 3′
ends of the first antisense polynucleotide strands;
c) diluting the first antisense polynucleotide strands to substantially eliminate at least some low-abundance first antisense polynucleotide strands; and
d) producing first double-stranded polynucleotides from the remaining first antisense polynucleotide strands, wherein the first double-stranded polynucleotides are enriched in high-abundance polynucleotide sequences relative to the polynucleotide sample. - View Dependent Claims (50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 90)
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70. A method for preparing a selected polynucleotide pool from a polynucleotide sample comprising:
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a) hybridizing first antisense polynucleotide strands prepared from a first polynucleotide sample to sense polynucleotide strands of, or prepared from, a second polynucleotide sample, wherein the first antisense polynucleotide strands are enriched in high-abundance polynucleotide sequences relative to the first polynucleotide sample, thereby producing unhybridized sense polynucleotide strands that are enriched in low-abundance polynucleotide sequences relative to the second polynucleotide sample; and
b) synthesizing second antisense polynucleotide strands from the unhybridized sense polynucleotide strands using an antisense primer or an antisense primer complex, said antisense primer complex comprising an antisense primer operably linked to an RNA promoter sequence, wherein the RNA promoter sequence is 5′
of the antisense primer;
c) adding a universal primer site to the 3′
ends of the second antisense polynucleotide strands;
d) producing double-stranded polynucleotides from the second antisense polynucleotide strands. - View Dependent Claims (71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 91)
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85. A plurality of polynucleotides prepared from a polynucleotide sample, wherein the plurality of polynucleotides includes at least 103 different polynucleotides and is substantially enriched in high-abundance polynucleotide sequences relative to the polynucleotide sample, wherein the polynucleotides each comprise a RNA promoter sequence and a universal primer site.
- 86. A plurality of polynucleotides prepared from a polynucleotide sample, wherein the plurality of polynucleotides includes at least 103 different polynucleotides and is substantially enriched in low-abundance polynucleotide sequences relative to the polynucleotide sample.
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94. A method for preparing a selected polynucleotide pool from a polynucleotide sample comprising:
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a) synthesizing first antisense polynucleotide strands from sense polynucleotides of, or prepared from, the polynucleotide sample;
b) diluting the first antisense polynucleotide strands to substantially eliminate at least some low-abundance first antisense polynucleotide strands; and
c) producing first double-stranded polynucleotides from the remaining first antisense polynucleotide strands, wherein the first double-stranded polynucleotides are enriched in high-abundance polynucleotide sequences relative to the polynucleotide sample;
d) producing second antisense polynucleotide strands from the first double-stranded polynucleotides;
e) contacting the second antisense polynucleotide strands with sense polynucleotide strands of, or prepared from, the polynucleotide sample under hybridization conditions to form a hybridization mixture, thereby producing unhybridized sense polynucleotide strands that are enriched in low-abundance polynucleotide sequences relative to the polynucleotide sample;
f) synthesizing third antisense polynucleotide strands from the unhybridized sense polynucleotide strands;
g) producing second double-stranded polynucleotides from the third antisense polynucleotide strands.
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Specification