Experimental conditions improving in-solution target enrichment for ancient DNA

Area of Science:

• Ancient DNA research
• Genomics
• Molecular Biology

Background:

• High-throughput sequencing advances ancient DNA studies.
• Shotgun sequencing faces contamination challenges from microbial DNA.
• DNA capture-enrichment offers a cost-effective solution for focusing on endogenous DNA.

Purpose of the Study:

• To investigate experimental parameters affecting MYbaits in-solution capture assays.
• To identify critical factors for efficient capture of nuclear loci and whole genomes from ancient samples.

Main Methods:

• Systematic exploration of experimental variables in MYbaits capture assays.
• Analysis of probe quantities, starting DNA amount, probe tiling, hybridization temperature, and endogenous DNA proportion.
• Evaluation of probe features like GC content, CpG dinucleotides, complexity, entropy, and self-annealing properties.

Main Results:

• Probe quantity had a moderate effect on capture outcomes.
• Starting DNA, probe tiling, hybridization temperature, and endogenous DNA proportion significantly impacted assay performance.
• Probe design features (GC content, CpG, complexity, entropy, self-annealing) are crucial for assay efficacy.

Conclusions:

• Optimized experimental conditions and probe design enhance the recovery of genetic information from ancient DNA.
• This study provides insights for improving capture assays for degraded and ancient remains.
• Effective capture strategies are vital for advancing ancient genomics research.