Recombinant polymerases for incorporation of protein shield nucleotide analogs

• US 10,626,456 B2
• Filed: 12/14/2017
• Issued: 04/21/2020
• Est. Priority Date: 10/01/2012
• Status: Active Grant

• Current Assignee: Pacific Bioscience of California Incorporated (L'Oreal SA)
• Original Assignee: Pacific Bioscience of California Incorporated (L'Oreal SA)
• Inventors: Kamtekar, Satwik, Miller, Erik
• Primary Examiner(s): Hutson, Richard G
• Application Number:
  US15/842,467
• Publication Number:
  US 20180223352A1
• Time in Patent Office: 859 Days
• Field of Search: None
• CPC Class Codes: C12N 9/1252 DNA-directed DNA polymerase (2.7.7.7), i.e. DNA replicase
• CPC Class Codes: C12Q 1/686 Polymerase chain reaction [PCR]
• CPC Class Codes: C12Q 1/6869 Methods for sequencing
• CPC Class Codes: C12Y 207/07007 DNA-directed DNA polymerase (2.7.7.7), i.e. DNA replicase

Abstract

Provided are compositions comprising recombinant DNA polymerases that include amino acid substitutions, insertions, deletions, and/or exogenous features that confer modified properties upon the polymerase for enhanced single molecule sequencing or nucleic acid amplification. Such properties include enhanced performance with large nucleotide analogs, increased stability, increased readlength, and improved detection of modified bases, and can also include resistance to photodamage, enhanced metal ion coordination, reduced exonuclease activity, reduced reaction rates at one or more steps of the polymerase kinetic cycle, decreased branching fraction, altered cofactor selectivity, increased yield, increased accuracy, altered speed, increased cosolvent resistance, and the like. Also provided are nucleic acids which encode the polymerases with the aforementioned phenotypes, as well as methods of using such polymerases to make a DNA or to sequence a DNA template.

Claims

1. A composition comprising:

a recombinant DNA polymerase, which recombinant polymerase comprises an amino acid sequence that is at least 80% identical to SEQ ID NO;

1 or at least 80% identical to SEQ ID NO;

2, and which recombinant polymerase comprises a mutation selected from the group consisting of a T434A substitution, a T434S substitution and a T434V substitution, wherein identification of positions is relative to SEQ ID NO;

1.

2. The composition of claim 1, wherein the recombinant polymerase comprises a T434A substitution, wherein identification of positions is relative to SEQ ID NO:

1.

3. The composition of claim 1, wherein the recombinant polymerase further comprises one or more mutations selected from the group consisting of an amino acid substitution at position 224, an amino acid substitution at position 239, an amino acid substitution at position 253, an amino acid substitution at position 375, an amino acid substitution at position 437, an amino acid substitution at position 484, an amino acid substitution at position 510, an amino acid substitution at position 512, and an amino acid substitution at position 515, wherein identification of positions is relative to SEQ ID NO:

1.

4. The composition of claim 3, wherein the recombinant polymerase comprises one or more mutations selected from the group consisting of a Y224K substitution, an E239G substitution, an L253A substitution, an E375Y substitution, an A437G substitution, an A437N substitution, an A484E substitution, a D510K substitution, a K512Y substitution, and an E515Q substitution, wherein identification of positions is relative to SEQ ID NO:

1.

5. The composition of claim 3, wherein the recombinant polymerase comprises E375Y, A484E, and K512Y substitutions, wherein identification of positions is relative to SEQ ID NO:

1.

6. The composition of claim 1, wherein the recombinant polymerase comprises an amino acid sequence that is at least 90% identical to SEQ ID NO:

1.

7. The composition of claim 1, wherein the recombinant polymerase comprises an amino acid sequence that is at least 90% identical to SEQ ID NO:

2.

8. The composition of claim 1, wherein the recombinant polymerase comprises one or more exogenous features at the C-terminal and/or N-terminal region of the polymerase.

9. The composition of claim 8, wherein the recombinant polymerase comprises a biotin ligase recognition sequence and a polyhistidine tag.

10. The composition of claim 1, wherein the recombinant polymerase comprises two tandem biotin ligase recognition sequences at the C-terminal region of the polymerase.

11. The composition of claim 1, comprising a phosphate-labeled nucleotide analog.

12. The composition of claim 11, wherein the nucleotide analog comprises a fluorophore.

13. The composition of claim 1, comprising a phosphate-labeled nucleotide analog and a DNA template, wherein the recombinant polymerase incorporates the nucleotide analog into a copy nucleic acid in response to the DNA template.

14. The composition of claim 1, wherein the composition is present in a DNA sequencing system.

15. The composition of claim 14, wherein the sequencing system comprises a zero-mode waveguide.

16. The composition of claim 15, wherein the recombinant polymerase is immobilized on a surface of the zero-mode waveguide in an active form.

17. A method of sequencing a DNA template, the method comprising:

a) providing a reaction mixture comprising;

the DNA template,

a replication initiating moiety that complexes with or is integral to the template,

the recombinant DNA polymerase of claim 1, wherein the polymerase is capable of replicating at least a portion of the template using the moiety in a template-dependent polymerization reaction, and

one or more nucleotides and/or nucleotide analogs;

b) subjecting the reaction mixture to a polymerization reaction in which the recombinant polymerase replicates at least a portion of the template in a template-dependent manner, whereby the one or more nucleotides and/or nucleotide analogs are incorporated into the resulting DNA; and

c) identifying a time sequence of incorporation of the one or more nucleotides and/or nucleotide analogs into the resulting DNA.

18. The method of claim 17, wherein the subjecting and identifying steps are performed in a zero mode waveguide.

19. A method of making a DNA, the method comprising:

(a) providing a reaction mixture comprising;

a template,

a replication initiating moiety that complexes with or is integral to the template,

the recombinant DNA polymerase of claim 1, which polymerase is capable of replicating at least a portion of the template using the moiety in a template-dependent polymerase reaction, and

one or more nucleotides and/or nucleotide analogs; and

(b) reacting the mixture such that the polymerase replicates at least a portion of the template in a template-dependent manner, whereby the one or more nucleotides and/or nucleotide analogs are incorporated into the resulting DNA.

20. The method of claim 19, wherein the mixture is reacted in a zero mode waveguide.

21. The method of claim 19, the method comprising detecting incorporation of the one or more nucleotides and/or nucleotide analogs.