CRISPR-based targeted haplotype-resolved assembly of a megabase region

Area of Science:

• Genomics
• Molecular Biology
• Bioinformatics

Background:

• High-quality haplotype-resolved genome assemblies are crucial for genetic variant detection.
• Targeted access to such data is valuable for researchers focusing on specific genomic regions.
• The Major Histocompatibility Complex (MHC) is a complex, difficult-to-assemble genomic region.

Purpose of the Study:

• To develop and demonstrate a targeted approach for constructing haplotype-resolved assemblies of difficult genomic regions.
• To evaluate the efficiency and accuracy of this method compared to traditional genome assembly.
• To showcase the utility of targeted assembled haplotypes for downstream analyses.

Main Methods:

• Utilized CRISPR-based enrichment for targeted DNA regions.
• Constructed haplotype-resolved assemblies of the Major Histocompatibility Complex (MHC) region.
• Compared the targeted assembly approach with whole-genome haplotype-resolved assembly.

Main Results:

• Achieved comparable completeness and accuracy to whole-genome assembly with reduced computational complexity and cost.
• Demonstrated improved quantification accuracy for sequencing data using targeted MHC haplotypes.
• Enabled allele-specific functional genomics analyses of the MHC region.

Conclusions:

• The CRISPR-based targeted assembly approach is a resource-efficient method for generating high-quality haplotype-resolved genomic data.
• This method facilitates population genetic studies and the investigation of molecular mechanisms in diseases.
• The approach holds promise for advancing research in targeted genomic regions.