Methods and compositions for sequencing complementary polynucleotides

1. A method of identifying a detectable nucleotide analogue, said method comprising:

a) hybridizing a first sequencing primer to a polynucleotide immobilized to a solid support, wherein said polynucleotide comprises a primer binding sequence and a template nucleic acid sequence comprising a plurality of cleavable sites;

b) contacting said first sequencing primer hybridized to said polynucleotide with a first detectable nucleotide analogue and a polymerase to form a first polymerase complex, detecting the first polymerase complex, and identifying said first detectable nucleotide analogue;

c) incorporating one or more nucleotides into said first sequencing primer hybridized to said polynucleotide with a polymerase to create an extension strand hybridized to said polynucleotide;

d) cleaving the at least one cleavable site, thereby generating a polynucleotide fragment immobilized to the solid support and at least one non-immobilized polynucleotide fragment, wherein said polynucleotide fragment immobilized to the solid support is hybridized to said extension strand;

e) removing the one or more non-immobilized polynucleotide fragments; and

f) hybridizing a second sequencing primer to said extension strand and contacting said second sequencing primer hybridized to said extension strand with a second detectable nucleotide analogue and a polymerase to form a second polymerase complex, detecting the second polymerase complex, and identifying said second detectable nucleotide analogue.

2. The method of claim 1 , wherein said first detectable nucleotide analogue is associated with a detectable moiety, and wherein identifying said first detectable nucleotide analogue comprises detecting said detectable moiety in said first polymerase complex.

3. The method of claim 1 , wherein said second nucleotide analogue is associated with a detectable moiety, and wherein identifying said second detectable moiety comprises detecting said detectable moiety in said second polymerase complex.

4. The method of claim 1 , wherein removing the one or more non-immobilized polynucleotide fragments comprises digesting the one or more non-immobilized polynucleotide fragments using an exonuclease enzyme.

5. The method of claim 1 , wherein removing the one or more non-immobilized polynucleotide fragments comprises denaturing and washing away the one or more non-immobilized polynucleotide fragments.

6. The method of claim 1 , wherein said polynucleotide is immobilized to the solid support via a linker.

7. The method of claim 1 , wherein said polynucleotide is a concatemer comprising tandem repeat units of said polynucleotide sequence.

8. The method of claim 1 , wherein the solid support comprises a plurality of polynucleotides, wherein each polynucleotide is immobilized to the solid support at a 5′ end of the polynucleotide.

9. The method of claim 1 , wherein the at least one cleavable site comprises an abasic site, deoxyuracil triphosphate (dUTP), deoxy-8-Oxo-guanine triphosphate (d-8-oxoG), methylated nucleotide, ribonucleotide, or a sequence containing a modified or unmodified nucleotide that is specifically recognized by a cleaving agent.

10. The method of claim 1 , wherein cleaving the at least one cleavable site comprises contacting the cleavable site with a cleaving agent, wherein the cleaving agent comprises a Rnase, Formamidopyrimidine DNA Glycosylase (Fpg), endonuclease, or uracil DNA glycosylase (UDG).

11. The method of claim 1 , wherein step (c) further comprises terminating extension by incorporating one or more ddNTPs into the 3′ end of the extension strand.

12. The method of claim 1 , wherein said polynucleotide is about 100 to 1000 nucleotides in length.

13. The method of claim 1 , wherein the solid support comprises a polymer coating.

14. A method of detecting a polynucleotide sequence, said method comprising:

i) hybridizing a first sequencing primer to a polynucleotide immobilized to a solid support, wherein said polynucleotide comprises a primer binding sequence and a template nucleic acid sequence comprising a plurality of cleavable sites;

ii) contacting said first sequencing primer hybridized to said polynucleotide with a nucleotide analogue and a polymerase, binding said nucleotide analogue to a complementary nucleotide of said polynucleotide, wherein said nucleotide analogue is associated with a detectable moiety, and detecting said detectable moiety;

iii) incorporating one or more nucleotides into the first sequencing primer with a polymerase to create an extension strand hybridized to the polynucleotide;

iv) cleaving the at least one cleavable site, thereby generating a polynucleotide fragment immobilized to the solid support and at least one non-immobilized polynucleotide fragment, wherein said polynucleotide fragment immobilized to the solid support is hybridized to said extension strand;

v) removing the one or more non-immobilized polynucleotide fragments; and

vi) hybridizing a second sequencing primer to said extension strand and contacting said second sequencing primer hybridized to said extension strand with a nucleotide analogue and a polymerase, binding said nucleotide analogue to a complementary nucleotide of said extension strand, wherein said nucleotide analogue is associated with a detectable moiety, and detecting said detectable moiety.

15. The method of claim 14 , wherein detecting said detectable moiety identifies said nucleotide analogue.

16. The method of claim 14 , wherein removing the one or more non-immobilized polynucleotide fragments comprises digesting the one or more non-immobilized polynucleotide fragments using an exonuclease enzyme.

17. The method of claim 14 , wherein removing the one or more non-immobilized polynucleotide fragments comprises denaturing and washing away the one or more non-immobilized polynucleotide fragments.

18. The method of claim 14 , wherein said polynucleotide is immobilized to the solid support via a linker.

19. The method of claim 14 , wherein said polynucleotide is a concatemer comprising tandem repeat units of said polynucleotide sequence.

20. The method of claim 14 , wherein the solid support comprises a plurality of polynucleotides, wherein each polynucleotide is immobilized to the solid support at a 5′ end of the polynucleotide.

21. The method of claim 14 , wherein the at least one cleavable site comprises an abasic site, deoxyuracil triphosphate (dUTP), deoxy-8-Oxo-guanine triphosphate (d-8-oxoG), methylated nucleotide, ribonucleotide, or a sequence containing a modified or unmodified nucleotide that is specifically recognized by a cleaving agent.

22. The method of claim 14 , wherein cleaving the at least one cleavable site comprises contacting the cleavable site with a cleaving agent, wherein the cleaving agent comprises a Rnase, Formamidopyrimidine DNA Glycosylase (Fpg), endonuclease, or uracil DNA glycosylase (UDG).

23. The method of claim 14 , wherein step (iii) further comprises terminating extension by incorporating one or more ddNTPs into the 3′ end of the extension strand.

24. The method of claim 14 , wherein said polynucleotide is about 100 to 1000 nucleotides in length.

25. The method of claim 14 , wherein the solid support comprises a polymer coating.

26. The method of claim 1 , wherein prior to step (a), the method further comprises: i) hybridizing a template nucleic acid to a primer immobilized on said solid support; ii) contacting said template nucleic acid with a polymerase and a plurality of nucleotides, wherein one or more nucleotides of said plurality comprises a deoxyuracil nucleobase; and iii) incorporating said plurality of nucleotides into a 3′ end of said immobilized primer hybridized to said template nucleic acid with said polymerase, thereby generating said polynucleotide immobilized to said solid support.

27. The method of claim 1 , wherein said plurality of cleavable sites is not in a primer binding sequence.

28. The method of claim 1 , wherein said polynucleotide is a concatemer comprising tandem repeat units of said a target sequence.

29. The method of claim 1 , wherein one or more nucleotides of step c) comprise deoxyuracil triphosphate (dUTP).

30. A method of identifying a detectable nucleotide analogue, said method comprising:

a) hybridizing a first sequencing primer to a polynucleotide immobilized to a solid support, wherein said polynucleotide is a concatemer comprising tandem repeat units of a target sequence, and wherein said polynucleotide comprises a plurality of internal cleavable sites;

b) contacting said first sequencing primer with a first detectable nucleotide analogue and a polymerase to form a first polymerase complex, detecting the first polymerase complex, and identifying said first detectable nucleotide analogue;

c) incorporating one or more nucleotides into said first sequencing primer hybridized to said polynucleotide with a polymerase to create an extension strand hybridized to said polynucleotide;

d) cleaving said plurality of internal cleavable sites, thereby generating a polynucleotide fragment immobilized to the solid support and a non-immobilized polynucleotide fragment, wherein said polynucleotide fragment immobilized to the solid support is hybridized to said extension strand;

e) removing the non-immobilized polynucleotide fragment; and

f) hybridizing a second sequencing primer to said extension strand and contacting said second sequencing primer hybridized to said extension strand with a second detectable nucleotide analogue and a polymerase to form a second polymerase complex, detecting the second polymerase complex, and identifying said second detectable nucleotide analogue.