Methods for genome assembly and haplotype phasing
View Patent ↗The disclosure provides methods to assemble genomes of eukaryotic or prokaryotic organisms. The disclosure further provides methods for haplotype phasing and meta-genomics assemblies.
1. A method of generating a first read pair from a first DNA molecule, comprising:
(a) providing at least one DNA-binding molecule to the first DNA molecule, wherein the first DNA molecule comprises a first DNA segment and a second DNA segment, and further wherein the at least one DNA-binding molecule binds to the first DNA molecule, thereby forming at least one complex;
(b) contacting the at least one complex with a cross-linking agent;
(c) cleaving the first DNA molecule between the first DNA segment and the second DNA segment, thereby generating a first DNA segment end and a second DNA segment end;
(d) attaching the first DNA segment end to the second DNA segment end to form an attachment product; and
(e) sequencing at least a portion of the attachment product such that sequence from the first DNA segment and the second DNA segment is obtained;
thereby generating the first read pair information identifying the first DNA segment and the second DNA segment as originating from the first DNA molecule.
2. The method of claim 1 , wherein the at least one DNA-binding molecule comprises a protein.
3. The method of claim 1 , wherein the cross-linking agent comprises formaldehyde.
4. The method of claim 1 , wherein attaching the first DNA segment end to the second DNA segment end to form an attachment product comprises ligating the first DNA segment end to the second DNA segment end.
5. The method of claim 1 , comprising attaching at least one of the first DNA segment end and the second DNA segment end to at least one affinity label prior to sequencing.
6. The method of claim 1 , comprising assigning contigs to which the first DNA segment map and the second DNA segment map to a first common scaffold.
7. The method of claim 1 , further comprising generating a second read-pair from a second DNA molecule, comprising:
(a) providing at least one DNA-binding molecule to the second DNA molecule, wherein the second DNA molecule comprises a third DNA segment and a fourth DNA segment, and further wherein the at least one DNA-binding molecule binds to the second DNA molecule, thereby forming at least one complex;
(b) contacting the at least one complex with a cross-linking agent;
(c) cleaving the second DNA molecule between the third DNA segment and the fourth DNA segment, thereby generating a third DNA segment end and a fourth DNA segment end;
(d) attaching the third DNA segment end to the fourth DNA segment end to form an attachment product; and
(e) sequencing at least a portion of the attachment product such that sequence from the third DNA segment and the fourth DNA segment is obtained;
thereby generating the second read-pair information identifying the third DNA segment and the fourth DNA segment as originating from the second DNA molecule.
8. The method of claim 7 , wherein less than 40% of the DNA segments from the first DNA molecule are attached to DNA segments from the second DNA molecule.
9. The method of claim 1 , wherein the first DNA molecule is from a human subject.
10. The method of claim 1 , wherein the first DNA molecule is cleaved using at least one restriction enzyme.
11. The method of claim 1 , further comprising assembling at least one contig of the first DNA molecule using the first read pair.
12. The method of claim 1 , comprising attaching at least one of the first DNA segment end and the second DNA segment end to a barcode.
13. The method of claim 2 , wherein the protein comprises a histone.
14. The method of claim 5 , wherein the at least one affinity label comprises biotin.
15. The method of claim 5 , wherein the method further comprises immobilizing the affinity label on a solid support.
16. The method of claim 7 , wherein attaching the third DNA segment end to the fourth DNA segment end to form an attachment product comprises ligating the third DNA segment end to the fourth DNA segment end.
17. The method of claim 7 , further comprising attaching at least one of the third DNA segment end and the fourth DNA segment end to at least one affinity label prior to sequencing.
18. The method of claim 7 , comprising attaching at least one of the third DNA segment end and the fourth DNA segment end to a barcode.