Nucleic acid probes and microarrays for analysis of polynucleotides
First Claim
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1. A probe set for detecting a target polynucleotide, comprising:
- a) a first oligonucleotide bound to a surface of a solid support by its 3′
end and comprises;
i) a surface-proximal target complementary region that base-pairs with said target polynucleotide to form a probe/target duplex; and
ii) a surface-distal stem-complementary region; and
b) a second oligonucleotide comprising a loop region and a stem region, wherein said stem region is complementary to said stem-complementary region,wherein hybridization of said first oligonucleotide and said second oligonucleotide results in a stem-loop in which the 3′
terminal nucleotide of said second oligonucleotide is directly adjacent to the 5′
terminal nucleotide of said first oligonucleotide, wherein said stem-loop stabilizes said probe/target duplex.
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Abstract
The invention provides a probe for detecting a target polynucleotide. The probe contains a region that base-pairs with a target polynucleotide to form a duplex and a RNA hairpin extension domain that increases the stability of the duplex. The probe may further include a nucleotide clamp, a stem-complementary region and/or a linker moiety. Also provided is an array of subject probes bound to a surface of a solid support. Methods of using a subject probe to assess target polynucleotides, e.g., small RNAs, in a sample are provided, as are kits for use in practicing the subject methods.
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17 Claims
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1. A probe set for detecting a target polynucleotide, comprising:
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a) a first oligonucleotide bound to a surface of a solid support by its 3′
end and comprises;i) a surface-proximal target complementary region that base-pairs with said target polynucleotide to form a probe/target duplex; and ii) a surface-distal stem-complementary region; and b) a second oligonucleotide comprising a loop region and a stem region, wherein said stem region is complementary to said stem-complementary region, wherein hybridization of said first oligonucleotide and said second oligonucleotide results in a stem-loop in which the 3′
terminal nucleotide of said second oligonucleotide is directly adjacent to the 5′
terminal nucleotide of said first oligonucleotide, wherein said stem-loop stabilizes said probe/target duplex. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification