CRISPR-Cap: multiplexed double-stranded DNA enrichment based on the CRISPR system.

Area of Science:

• Molecular Biology
• Genomics
• Biotechnology

Background:

• Traditional DNA target enrichment methods like PCR, hybridization capture, and molecular inversion probes often suffer from long experiment times, low throughput, and suboptimal enrichment quality.
• These limitations hinder efficient genomic DNA analysis and application development.

Purpose of the Study:

• To develop a simple, scalable, and efficient CRISPR-based method for DNA target enrichment.
• To overcome the drawbacks associated with existing target enrichment techniques.

Main Methods:

• CRISPR-Cap, a novel CRISPR-based DNA target enrichment technique, was developed.
• The method involves two short experimental procedures, completed within two hours, for enriching double-stranded DNA (dsDNA) target regions.

Main Results:

• CRISPR-Cap achieved an average enrichment of 355.7-fold for 10 target genes from Escherichia coli genomic DNA, with a maximum on-target ratio of 81% and high uniformity.
• The method successfully measured gene copy numbers and detected rare alleles at frequencies as low as 1%.
• Coding sequence regions of 20 genes from the human genome were also enriched.

Conclusions:

• CRISPR-Cap offers a rapid and scalable alternative to conventional target enrichment methods.
• This technique broadens the application of CRISPR technology in the field of target enrichment for genomic analysis.