IP Library › Granted Patent US 12,258,615
Granted Patent B2
US 12,258,615 · App. 17/409,731 · Granted Mar 25, 2025

Compositions and methods of labeling mitochondrial nucleic acids and sequencing and analysis thereof

Inventors: Mo Li (Thuwal, SA); Chongwei Bi (Thuwal, SA)
Assignee: KING ABDULLAH UNIVERSITY OF SCIENCE AND TECHNOLOGY
C12Q1/6806C12Q1/6869G16B30/10C40B40/08
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Quick Facts
Patent No.
US 12,258,615
App. No.
17/409,731
Granted
Mar 25, 2025
Kind
B2
Abstract

Methods of labeling, amplifying, and sequencing mitochondrial DNA are provided. The labeling methods typically include using polymerase-based extension of one or more unique molecular identifier (UMI) primers along a target mitochondrial DNA template, each UMI primer including a universal primer sequence, a unique molecular identifier sequence, and a mitochondrial DNA binding sequence. Amplification of the labeled-target mitochondrial DNA can include, for example, polymerase chain reaction (e.g., high-fidelity long-range). Methods of determining the sequence of labeled-target mitochondrial DNA can include use of a long-read sequencing platform. The methods may further including one or more of grouping sequences having the same UMI into one of more groups, determining the sequence of each labeled-target mitochondrial DNA by determining the consensus sequence of each group, and identifying polymorphisms in one or more of the labeled-target mitochondrial DNA. The methods can be used in, for example, preimplantation genetic testing.

Claims (27)

1. A method of analyzing full-length genomic mitochondrial DNA comprising

(a) preparing labeled-target mitochondrial DNA comprising polymerase-based extension of one or more unique molecular identifier (UMI) primers along a target mitochondrial DNA template, each UMI primer comprising a universal primer sequence, a unique molecular identifier (UMI) sequence, and a mitochondrial DNA binding sequence,

wherein the source of the target mitochondrial DNA template is any integer between 1 and 100 cells inclusive, or any range formed of two integers there between;

(b) amplifying the labeled-target mitochondrial DNA by one or more rounds of polymerase chain reaction (PCR) comprising a universal primer that binds to the universal primer sequence and one or more mitochondrial DNA primers that bind to a mitochondrial DNA sequence of the labeled-target mitochondrial DNA;

(c) sequencing the amplified labeled-target mitochondrial DNA using long-read sequencing technology;

(d) grouping sequences having the same UMI into one of more groups; and

(e) determining the full-length sequence of each labeled-target mitochondrial DNA by determining a consensus sequence of each UMI group.

2. The method of claim 1 , further comprising

(f) identifying polymorphisms in one or more of the labeled-target mitochondrial DNA.

3. The method of claim 2 , wherein the polymorphism is a single nucleotide polymorphism (SNP).

4. The method of claim 2 , wherein (e) and/or (f) are carried out using bioinformatics analysis.

5. The method of claim 4 , wherein the bioinformatics analysis comprises basecalling, sequence alignment(s), polymorphism identification or a combination thereof.

6. The method of claim 1 , wherein the long-read sequencing technology comprises a system for preparing ultra-long reads exceeding 800 kb, single molecule real time sequencing (SMRT).

7. The method of claim 6 , wherein the long-read sequencing technology comprises preparing a ID ligation library from the labeled amplicons.

8. The method of claim 1 , wherein the target mitochondrial DNA template comprises a gene selected from the group consisting of TP53, P21, XPB, XPD, TTDA, LMNA, WRN, CSA, CSB, TOR, S6K, IGF1, IIS, DNMT3A, TET2, JAK2, ASXL1, SF3B1, SRSF2, RUNX1, NRAS, and FLT3.

9. The method of claim 1 , wherein the target mitochondrial DNA template is from a single cell.

10. The method of claim 9 , wherein the source of the target mitochondrial DNA template is one single mitochondrion.

11. The method of claim 1 , wherein the source of the target mitochondrial DNA template is somatic cell(s).

12. The method of claim 1 , wherein the source of the target mitochondrial DNA template is germ cell(s).

13. The method of claim 1 , wherein the source of the target mitochondrial DNA template is oocyte(s) or pre-implantation embryonic tissue.

14. The method of claim 13 , further comprising identifying genomic mitochondrial mutations in the target mitochondrial DNA.

15. The method of claim 14 , further comprising determining the oocyte(s) or pre-implantation embryo has or is likely to develop a mitochondrial disease or disorder when the identified genomic mitochondrial mutation(s) are associated with the mitochondrial disease or disorder.

16. The method of claim 1 , wherein each specific UMI is associated with a single mitochondrial genome.

17. The method of claim 16 , further comprising (f) comparing the consensus sequence of each UMI group to determine the heterogeneity of mitochondrial genomic sequence among different mitochondria from the same cell.

18. The method of claim 17 , wherein the target mitochondrial DNA template is from a single cell, and further comprising repeating steps (a)-(f) separately on one or more additional single cells.

19. The method of claim 18 , further comprising (g) comparing the consensus sequence of each UMI group to determine the heterogeneity among different mitochondrial genomes from the different cells.

20. The method of claim 1 , wherein target mitochondrial DNA template is extracted from a lysate of the cell or cells prior to step (a).

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jan 12, 2023
From: LI, MO; BI, CHONGWEI
To: KING ABDULLAH UNIVERSITY OF SCIENCE AND TECHNOLOGY
Reel/Frame 062356/0864 →
Continuity (6)
Continuation In Part PCTIB2020051894 · Mar 4, 2020
Provisional Application 63073865 · Sep 2, 2020
Provisional Application 62899432 · Sep 12, 2019
Provisional Application 62899142 · Sep 11, 2019
Provisional Application 62813605 · Mar 4, 2019
Related Publication 20220056502A1 · Feb 24, 2022
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