Method for detecting a target nucleic acid sequence
First Claim
1. A method of detecting a target sequence portion of a nucleic acid comprising:
- providing for measurement a stem-and-loop structured nucleic acid, which comprises a double-stranded portion being formed by hybridization of complementary sequence portions on a nucleic acid strand; and
a looped single-stranded portion containing a target sequence portion which connects the two complementary sequence portions;
providing an immobilized probe nucleic acid having a sequence complementary to the target sequence portion which is immobilized at one end to a solid substrate surface;
reacting the stem-and-looped nucleic acid provided for measurement with the immobilized probe nucleic acid for a time and under conditions sufficient to specifically hybridize the target sequence portion of the stem-and-loop nucleic acid provided for measurement to the immobilized probe nucleic acid; and
detecting presence or absence of hybridization between the stem-and-loop structured nucleic acid provided for measurement and the immobilized probe nucleic acid, and detecting the target nucleic acid sequence when hybridization occurs;
wherein 5′
to 3′
sequence orientations of both the immobilized probe nucleic acid and the target sequence portion are arranged so that the double-stranded portion of the nucleic acid for measurement extends away from the solid surface when the probe nucleic acid and the target sequence portion are hybridized.
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Accused Products
Abstract
A method of detecting a target nucleic acid sequence comprising providing a stem-and-loop structured nucleic acid for measurement wherein the nucleic acid comprises complementary sequence portions located at both terminals and a target sequence portion therebetween as well as a double-stranded portion formed by hybridization of the complementary sequence portions located at both terminals and a remaining looped single-stranded portion, providing a probe nucleic acid having a sequence complementary to the target sequence portion wherein one end of the probe nucleic acid being immobilized to a solid substrate surface, reacting the nucleic acid for measurement with the probe nucleic acid to specifically hybridize the target sequence portion of the nucleic acid for measurement to the probe nucleic acid, and detecting presence or absence of the nucleic acid for measurement hybridized to the probe nucleic acid.
13 Citations
10 Claims
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1. A method of detecting a target sequence portion of a nucleic acid comprising:
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providing for measurement a stem-and-loop structured nucleic acid, which comprises a double-stranded portion being formed by hybridization of complementary sequence portions on a nucleic acid strand; and
a looped single-stranded portion containing a target sequence portion which connects the two complementary sequence portions;providing an immobilized probe nucleic acid having a sequence complementary to the target sequence portion which is immobilized at one end to a solid substrate surface; reacting the stem-and-looped nucleic acid provided for measurement with the immobilized probe nucleic acid for a time and under conditions sufficient to specifically hybridize the target sequence portion of the stem-and-loop nucleic acid provided for measurement to the immobilized probe nucleic acid; and detecting presence or absence of hybridization between the stem-and-loop structured nucleic acid provided for measurement and the immobilized probe nucleic acid, and detecting the target nucleic acid sequence when hybridization occurs; wherein 5′
to 3′
sequence orientations of both the immobilized probe nucleic acid and the target sequence portion are arranged so that the double-stranded portion of the nucleic acid for measurement extends away from the solid surface when the probe nucleic acid and the target sequence portion are hybridized. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of detecting a target sequence portion of a nucleic acid comprising:
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providing for measurement a stem-and-loop structured nucleic acid produced by LAMP (loop mediated isothermal amplification) containing a target nucleic acid sequence in a single-stranded loop portion of said nucleic acid, contacting for a time and under conditions suitable for hybridization said stem-and-loop structured nucleic acid with an immobilized probe that binds to the target nucleic acid sequence located in a single-stranded loop portion of the stem-and-loop nucleic acid, and detecting the target nucleic acid sequence when hybridization occurs; wherein 5′
to 3′
sequence orientations of both the immobilized probe nucleic acid and the target sequence portion are arranged so that the double-stranded portion of the nucleic acid for measurement extends away from the solid surface when the probe nucleic acid and the target sequence portion are hybridized.
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Specification