Sequencing using concatemers of copies of sense and antisense strands

Patent metadata

Field	Value
Publication number	US-9910956-B2
Application number	US-201615242201-A
Country	US
Kind code	B2
Filing date	Aug 19, 2016
Priority date	Mar 28, 2008
Publication date	Mar 6, 2018
Grant date	Mar 6, 2018

Abstract

Methods and systems for single molecule sequencing using concatemers of copies of sense and antisense strands. Concatemers are provided, for example, by carrying out rolling circle amplification on a circular molecule having sense and antisense regions to produce repeated copies of the sense and antisense regions connected by linking regions. The circular molecules can be produced by ligating hairpin adapters to each end of a double-stranded nucleic acid having a sense and antisense strand. The ligations can be carried out, for example using blunt end ligation. In some cases, a single molecule consensus sequence for a single template molecule is obtained. A single read from each template molecule can be obtained by comparing the sequence information of the sense and antisense regions.

First claim

What is claimed is:

1. A method of obtaining nucleotide sequence information from nucleic acid segments of a nucleic acid sample, the method comprising:
a) fragmenting a nucleic acid sample, thereby providing at least one double-stranded nucleic acid fragment comprising a double-stranded region comprising a sense strand and a complementary antisense strand of said sense strand;
b) ligating a first hairpin adapter to a first end of said double-stranded nucleic acid fragment and ligating a second hairpin adapter to a second end of double-stranded said nucleic acid fragment, thereby providing a circular nucleic acid;
c) performing a rolling circle replication reaction with said circular nucleic acid as a template, thereby producing a concatemer having segments comprising repeating copies of said sense strand and said antisense strand;
d) performing a single-molecule sequencing process, thereby generating a single sequencing read from said concatemer, said single sequencing read comprising at least one first sequence corresponding to said sense strand and at least one second sequence corresponding to said antisense strand; and
e) comparing or assembling said at least one first sequence and said at least one second sequence from said single sequencing read, thereby obtaining the nucleotide sequence information of said nucleic acid segments of the nucleic acid sample.

2. The method of claim 1 , wherein said single-molecule sequencing process is performed using an electrochemical system.

3. The method of claim 1 , wherein said single-molecule sequencing process is performed using a nanopore sensor.

4. The method of claim 1 , wherein said single-molecule sequencing process is performed using a sequencing by synthesis technology.

5. The method of claim 1 , wherein said first hairpin adapter and said second hairpin adapter are identical.

6. The method of claim 1 , wherein said first hairpin adapter and said second hairpin adapter have blunt ends.

7. The method of claim 1 , wherein said first hairpin adapter or said second hairpin adapter, or both said first hairpin adapter and said second hairpin adapter, comprises or comprise a registration sequence.

8. The method of claim 1 , wherein the nucleic acid sample comprises genomic DNA.

9. The method of claim 1 , wherein the nucleic acid sample comprises amplification products.

10. The method of claim 1 , wherein the double-stranded region comprises at least 1000 base pairs.

11. The method of claim 1 further comprises determining a consensus sequence of said nucleic acid segments by said comparing or assembling the at least one first sequence corresponding to the sense region, and at least one second sequence corresponding to the complementary antisense region.

12. The method of claim 11 wherein said consensus sequence of said nucleic acid segments is determined using heuristic methods, Hidden Markov models, Bayesian methods, machine learning approaches, neural networks, or self-organizing maps.

13. A method of obtaining nucleotide sequence information from segments of a single template molecule, the method comprising:
performing a single-molecule sequencing process on a single template molecule, wherein the single template molecule comprises a linear concatemer nucleic acid strand comprising segments comprising repeating, alternating copies of a sense region and a complementary antisense region of said sense region, first linking regions, and second linking regions, and wherein one of said first linking regions are present between 3′ end of one of the sense regions and 5′ end of one of the antisense regions, and wherein one of said second linking regions are present between 3′ end of one of the antisense regions and 5′ end of one of the sense regions,
thereby generating a sequence read from the single template molecule, the read comprising at least one first sequence corresponding to the sense region, and at least one second sequence corresponding to the complementary antisense region; and
comparing or assembling the at least one first sequence and the at least one second sequence from the sequence read, thereby obtaining nucleotide sequence information of the segments of the single template molecule.

14. The method of claim 13 , wherein the single-molecule sequencing process comprises a sequencing by synthesis technology.

15. The method of claim 14 , wherein the sequencing by synthesis technology comprises detecting incorporation of each nucleotide incorporated by a polymerase mediated, template dependent sequencing process.

16. The method of claim 13 , wherein the single-molecule sequencing process is performed using a nanopore sensor.

17. The method of claim 13 , wherein the sequence read comprises at least 1000 bases.

18. The method of claim 13 , wherein the first linking regions or the second linking regions, or both the first linking regions and the second linking regions, comprise a registration sequence.

19. The method of claim 13 , wherein the first linking regions and the second linking regions are identical.

20. The method of claim 13 further comprises determining a consensus sequence of said nucleic acid segments by said comparing or assembling the at least one first sequence corresponding to the sense region, and at least one second sequence corresponding to the complementary antisense region.

21. The method of claim 20 wherein said consensus sequence of said nucleic acid segments is determined using heuristic methods, Hidden Markov models, Bayesian methods, machine learning approaches, neural networks, or self-organizing maps.

Assignees

• Pacific Biosciences California Inc

Inventors

• Travers Kevin
• Otto Geoff
• Turner Stephen
• Heiner Cheryl
• Ma Congcong

Classifications

• C12Q2525/307

  Circular oligonucleotides · CPC title

• C12Q2525/155

  incorporating/generating a new priming site · CPC title

• C12Q2535/122

  Massive parallel sequencing · CPC title

• C12Q2525/301

  Hairpin oligonucleotides · CPC title

• C12Q1/6806

  Preparing nucleic acids for analysis, e.g. for polymerase chain reaction [PCR] assay (C12Q1/6804 takes precedence) · CPC title