Method of sequencing
First Claim
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1. A method for determining a nucleotide sequence of a single polynucleotide immobilised on a solid support comprising the steps of:
- (i) contacting said polynucleotide with at least one test complementary base and/or at least one probe comprising a portion which may be complementary to one or more bases in said polynucleotide to which a bead is attached or to which a first binding partner of a binding pair is attached and covalently binding said test complementary base and/or probe to said polynucleotide when said test complementary base and/or portion of said test complementary probe is complementary to said one or more bases in said polynucleotide;
(ii) when a binding partner is attached to said test complementary base and/or probe, binding a bead attached to a second binding partner of said binding pair to said test complementary base and/or probe to which said first binding partner is attached through said binding pair;
(iii) optionally repeating steps (i), or (i) and (ii), with at least one different test complementary base and/or probe until a test base which is complementary and/or a test probe which has a portion which is complementary to said one or more bases has bound to said polynucleotide;
(iv) determining which test complementary base and/or complementary portion of the test probe bound to said one or more bases of the polynucleotide by determining whether said bead attached to said test complementary base and/or probe bound to said polynucleotide during steps (i) to (iii) to identify said one or more bases of the polynucleotide; and
(v) removing said bead if not removed during step (iv);
wherein each cycle of steps (i) to (v) is performed one or more times and in each cycle one or more bases of said sequence are identified, and wherein binding of said bead to said polynucleotide during steps (i) to (iii) is detected using an apparatus comprising a surface provided with one or more light-sensitive elements, and said detection is by detecting light changes resulting from the bead blocking light from reaching the one or more light-sensitive elements.
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Abstract
The present invention provides a method of sequencing a single polynucleotide in which the nucleotide base and/or probe which is incorporated during sequencing is labelled with a bead which is detected to identity the base and/or probe which has bound to the single polynucleotide. Particularly, the detection of the bead may be carried out using an apparatus comprising a surface provided with a means for detecting a bead e.g. with one or more light sensitive elements.
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19 Claims
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1. A method for determining a nucleotide sequence of a single polynucleotide immobilised on a solid support comprising the steps of:
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(i) contacting said polynucleotide with at least one test complementary base and/or at least one probe comprising a portion which may be complementary to one or more bases in said polynucleotide to which a bead is attached or to which a first binding partner of a binding pair is attached and covalently binding said test complementary base and/or probe to said polynucleotide when said test complementary base and/or portion of said test complementary probe is complementary to said one or more bases in said polynucleotide; (ii) when a binding partner is attached to said test complementary base and/or probe, binding a bead attached to a second binding partner of said binding pair to said test complementary base and/or probe to which said first binding partner is attached through said binding pair; (iii) optionally repeating steps (i), or (i) and (ii), with at least one different test complementary base and/or probe until a test base which is complementary and/or a test probe which has a portion which is complementary to said one or more bases has bound to said polynucleotide; (iv) determining which test complementary base and/or complementary portion of the test probe bound to said one or more bases of the polynucleotide by determining whether said bead attached to said test complementary base and/or probe bound to said polynucleotide during steps (i) to (iii) to identify said one or more bases of the polynucleotide; and (v) removing said bead if not removed during step (iv); wherein each cycle of steps (i) to (v) is performed one or more times and in each cycle one or more bases of said sequence are identified, and wherein binding of said bead to said polynucleotide during steps (i) to (iii) is detected using an apparatus comprising a surface provided with one or more light-sensitive elements, and said detection is by detecting light changes resulting from the bead blocking light from reaching the one or more light-sensitive elements. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification