Droplet-based pyrosequencing
First Claim
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1. A droplet microactuator comprising:
- (a) one or more sequencing reagent droplets; and
(b) optionally, one or more nucleic acid sample droplets.
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Abstract
The present invention relates to a droplet microactuator and to systems, apparatuses and methods employing the droplet microactuator for executing various protocols using droplets. The invention includes a droplet microactuator or droplet microactuator system having one or more input reservoirs loaded with reagents for conducting sequencing protocols, such as the reagents for conducting a pyrosequencing protocol. The invention also includes a droplet microactuator or droplet microactuator system, having one or more input reservoirs loaded with a sample for conducting a pyrosequencing protocol.
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Citations
38 Claims
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1. A droplet microactuator comprising:
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(a) one or more sequencing reagent droplets; and (b) optionally, one or more nucleic acid sample droplets. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of identifying a base at a target position in a sample nucleic acid, the method comprising:
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(a) providing a droplet microactuator comprising a sample single stranded nucleic acid immobilized on a substrate; (b) contacting the immobilized sample nucleic acid with one or more reagent droplets to yield a sample droplet comprising; (i) an extension primer, which hybridizes to the sample nucleic acid to form a double-stranded portion of the sample nucleic acid; (ii) a polymerase; and (iii) a deoxynucleotide or dideoxynucleotide selected to incorporate at the target position and extend the double stranded portion of the sample nucleic acid and release pyrophosphate (PPi) within the droplet if it is complementary to a base immediately adjacent to the double stranded portion of the sample nucleic acid; and (c) together with step (b) or separately from step (b), detecting the quantity of PPi released within the sample droplet wherein release of PPi is indicative of incorporation of deoxynucleotide or dideoxynucleotide and the identification of a base complementary thereto. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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34. A method of identifying a base at a target position in a single-stranded sample nucleic acid, the method comprising:
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(a) providing a surface comprising immobilized single-stranded sample nucleic acid; (b) priming the immobilized single-stranded sample nucleic acid to yield a double stranded segment adjacent to a target nucleic acid; (c) extending the double stranded segment using a series of nucleotides, each of which will release a detectable molecule or signal if it is complementary to the base adjacent to the target nucleic acid; and (d) detecting the detectable molecule or signal to determine when a complementary nucleotide is incorporated. - View Dependent Claims (35, 36, 37, 38)
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Specification