DreaM: A Computational Pipeline for Enhanced Short-Read Sequence Analysis in Repetitive Genomic Regions
Kumar, S.; Esashi, F.
Show abstract
Mapping short sequencing reads to repetitive genomic regions, such as centromeres, presents significant challenges, primarily due to PCR duplicates, which can be erroneously mapped multiple times within these regions. Conventional bioinformatics pipelines often overlook this issue, potentially leading to misinterpretation as signal enrichment. To address this, we developed DreaM (Deduplication of Reads for Enhanced and Accurate Mapping), a computational pipeline that prioritises the preprocessing of raw sequencing data. DreaM firstly identifies and removes PCR duplicates, which is followed by read trimming to reduce noise from multiply mapped reads. When applied to ChIP-Seq and CUT&RUN datasets targeting CENP-A, a key marker of centromeres, DreaM demonstrated improved peak detection within centromeres. Overall, DreaM provides a robust solution for enhancing the analysis of DNA-protein binding sites in repetitive genomic regions using short-read sequencing.
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