IP Library › Granted Patent US 12,203,076
Granted Patent B2
US 12,203,076 · App. 17/807,835 · Granted Jan 21, 2025

Method for introducing mutations

Inventors: Leigh G. Monahan (Sydney, AU); Joyce To (Sydney, AU); Catherine Maree Burke (Sydney, AU); Michael Imelfort (Sydney, AU); Aaron Earl Darling (Sydney, AU)
Assignee: Illumina Singapore Pte. Ltd.
C12N15/66C07K14/00C12N9/1252C12N15/1065C12Q1/68C12Q2521/101C12Q2525/191C12Q2531/113
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Quick Facts
Patent No.
US 12,203,076
App. No.
17/807,835
Granted
Jan 21, 2025
Kind
B2
Abstract

The present invention relates to a method for introducing mutations into at least one target nucleic acid molecule comprising (a) providing at least one sample comprising at least one target nucleic acid molecule; and (b) amplifying the at least one target nucleic acid molecule using a low bias DNA polymerase. The present further relates to a use of a low bias DNA polymerase in a method for introducing mutations into one or more nucleic acid molecule(s), a group of sample tags, a method for designing the group of sample tags, a computer readable medium, and a method for preferentially amplifying target nucleic acid molecules.

Claims (56)

1. A method for determining a sequence of at least one target nucleic acid molecule, the method comprising:

a. providing at least one sample comprising at least one target nucleic acid molecule;

b. introducing mutations into the at least one target nucleic acid molecule, wherein introducing mutations comprises amplifying the at least one target nucleic acid molecule for 2 to 20 rounds using a high-fidelity low-bias DNA polymerase, unequal concentrations of dNTPs, and a nucleotide analog, to provide a mutated at least one target nucleic acid molecule;

c. amplifying and fragmenting the mutated at least one target nucleic acid molecule;

d. sequencing regions of the mutated at least one target nucleic acid molecule to provide mutated sequence reads; and

e. assembling a sequence for at least a portion of the at least one target nucleic acid molecule using the mutated sequence reads.

2. The method of claim 1 , wherein the dNTPs at unequal concentrations comprise dATP, dCTP, dTTP and dGTP and one or two of dATP, dCTP, dTTP or dGTP are at a lower concentration compared to other dNTPs.

3. The method of claim 2 , wherein the dNTPs at unequal concentrations comprise dTTP at a lower concentration than other dNTPs.

4. The method of claim 3 , wherein the dNTPs at unequal concentrations comprise dATP at a lower concentration compared to other dNTPs.

5. The method of claim 1 , wherein the method further comprises a step of identifying a dNTP whose level should be increased or decreased in order to reduce bias in the profile of mutations that are introduced.

6. The method of claim 1 , wherein the low bias DNA polymerase has a low template amplification bias.

7. The method of claim 1 , wherein the DNA polymerase mutates adenine, thymine, guanine, and cytosine nucleotides in the at least one target molecule at a rate ratio of 0.5-1.5:0.5-1.5:0.5-1.5:0.5-1.5 respectively.

8. The method of claim 1 , wherein the DNA polymerase mutates between 1% and 15% of the nucleotides in the at least one target DNA molecule or wherein the DNA polymerase mutates between 0% and 3%, or 2% of the nucleotides in the at least one target DNA molecule per round of replication.

9. The method of claim 1 , wherein the DNA polymerase introduces guanine or adenine nucleotides using a nucleotide analog at a rate ratio of 0.5-1.5:0.5-1.5, respectively, or wherein the DNA polymerase introduces guanine or adenine nucleotides using a nucleotide analog at a rate ratio of 0.7-1.3:0.7-1.3 respectively.

10. The method of claim 1 , wherein the DNA polymerase mutates between 1% and 15% of the nucleotides in the at least one target DNA molecule, or wherein the DNA polymerase mutates between 0% and 3%, of 2% of the nucleotides in the at least one target DNA molecule per round of replication.

11. The method of claim 1 , wherein the nucleotide analog is dPTP.

12. The method of claim 1 , wherein the DNA polymerase comprises a proof-reading domain or a processivity enhancing domain, or

wherein the DNA polymerase comprises a fragment of at least 400 contiguous amino acids of:

a. a sequence of SEQ ID NO. 2;

b. a sequence at least 95% identical to SEQ ID NO. 2;

c. a sequence of SEQ ID NO. 4;

d. a sequence at least 95% identical to SEQ ID NO. 4;

e. a sequence of SEQ ID NO. 6;

f. a sequence at least 95% identical to SEQ ID NO. 6;

g. a sequence of SEQ ID NO. 7; or

h. a sequence at least 95% identical to SEQ ID NO. 7.

13. The method of claim 12 , wherein the low bias DNA polymerase is a thermococcal polymerase, or derivative thereof.

14. The method of claim 1 ,

wherein the DNA polymerase comprises:

a. a sequence of SEQ ID NO. 2;

b. a sequence at least 95% identical to SEQ ID NO. 2;

c. a sequence of SEQ ID NO. 4;

d. a sequence at least 95% identical to SEQ ID NO. 4;

e. a sequence of SEQ ID NO. 6;

f. a sequence at least 95% identical to SEQ ID NO. 6;

g. a sequence of SEQ ID NO. 7; or

h. a sequence at least 95% identical to SEQ ID NO. 7.

15. The method of claim 1 , wherein:

i) the DNA polymerase comprises a sequence at least 98% identical to SEQ ID NO. 2;

ii) the DNA polymerase comprises a sequence at least 98% identical to SEQ ID NO. 4;

iii) the DNA polymerase comprises a sequence at least 98% identical to SEQ ID NO. 6; or

iv) the DNA polymerase comprises a sequence at least 98% identical to SEQ ID NO. 7.

16. The method of claim 1 , wherein the low bias DNA polymerase is a thermococcal polymerase, or derivative thereof.

17. The method of claim 1 , wherein the at least one target nucleic acid molecule is greater than 1 kbp.

18. The method of claim 1 , wherein the DNA polymerase introduces guanine to adenine substitution mutations, cytosine to thymine substitution mutations, adenine to guanine substitution mutations, and thymine to cytosine substitution mutations.

19. The method of claim 1 , wherein the DNA polymerase introduces guanine to adenine substitution mutations, cytosine to thymine substitution mutations, adenine to guanine substitution mutations, and thymine to cytosine substitution mutations at a rate ratio of 0.5-1.5:0.5-1.5:0.5-1.5:0.5-1.5, respectively.

20. The method of claim 1 , wherein the DNA polymerase introduces guanine to adenine substitution mutations, cytosine to thymine substitution mutations, adenine to guanine substitution mutations, and thymine to cytosine substitution mutations at a rate ratio of 0.7-1.3:0.7-1.3:0.7-1.3:0.7-1.3 respectively.

21. The method of claim 16 , wherein the thermococcal polymerase is derived from a thermococcal strain selected from the group consisting of T. kodakarensis, T. siculi, T. celer and T. sp KS-1.

22. The method of claim 3 , wherein the dNTPs at unequal concentrations comprise dTTP at a concentration less than 75% of the concentration of dATP, dCTP or dGTP.

23. The method of claim 3 , wherein the dNTPs at unequal concentrations comprise dTTP at a concentration less than 75% of the concentration of dCTP.

24. The method of claim 3 , wherein the dNTPs at unequal concentrations comprise dTTP at a concentration less than 60% of the concentration of dCTP.

25. The method of claim 3 , wherein the dNTPs at unequal concentrations comprise dTTP at a concentration between 25% and 60% of the concentration of dCTP.

26. The method of claim 4 , wherein the dNTPs at unequal concentrations comprise dATP at a concentration less than 75% of the concentration of dTTP, dCTP or dGTP.

27. The method of claim 4 , wherein the dNTPs at unequal concentrations of dNTPs comprise dATP at a concentration less than 75% of the concentration of dGTP.

28. The method of claim 4 , wherein the dNTPs at unequal concentrations comprise dATP at a concentration less than 60% of the concentration of dGTP.

29. The method of claim 4 , wherein the dNTPs at unequal concentrations comprise dATP at a concentration between 25% and 60% of the concentration of dGTP.

Assignments (2)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Dec 23, 2022
From: MONAHAN, LEIGH G.; TO, JOYCE; BURKE, CATHERINE M.; IMELFORT, MICHAEL; DARLING, AARON E.
To: LONGAS TECHNOLOGIES PTY LTD
Reel/Frame 062195/0728 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Dec 23, 2022
From: LONGAS TECHNOLOGIES PTY LTD
To: ILLUMINA SINGAPORE PTE. LTD.
Reel/Frame 062195/0820 →
Priority Claims (1)
GB 1802744 · Feb 20, 2018 · national
Continuity (2)
Division 16971293
Related Publication 20220348940A1 · Nov 3, 2022
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