Quantification of Genetic Heterogeneity Using Long-Read Targeted Individual DNA Molecule Sequencing

Area of Science:

• Genomics
• Molecular Biology
• Biotechnology

Background:

• Genetic heterogeneity is crucial for understanding biological systems and gene-environment interactions.
• Accurate quantification of genetic variants, especially rare ones, is challenging in cell populations.

Purpose of the Study:

• To introduce and detail a novel method, Individual DNA Molecule Sequencing (IDMseq), for precise quantification of genetic heterogeneity.
• To provide a comprehensive protocol for applying IDMseq in various research contexts.

Main Methods:

• IDMseq utilizes unique molecule identifiers (UMIs) to tag individual DNA molecules, ensuring distinct representation.
• The method incorporates error correction and long-read sequencing for sensitive variant detection.
• Includes protocols for UMI labeling, DNA amplification, cleanup, and data analysis.

Main Results:

• IDMseq enables accurate quantification of allele frequencies, even for rare variants.
• The technique allows for the sensitive detection of single nucleotide variants and large structural variants.
• Demonstrates versatility for both basic and clinical research applications.

Conclusions:

• IDMseq offers a robust solution for quantifying genetic heterogeneity with high precision.
• The protocol facilitates sensitive detection of diverse genetic variations in biological samples.
• IDMseq is a valuable tool for advancing genetic research in various settings.