Characterization of chromatin accessibility with a transposome hypersensitive sites sequencing (THS-seq) assay

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Abstract

Chromatin accessibility captures in vivo protein-chromosome binding status, and is considered an informative proxy for protein-DNA interactions. DNase I and Tn5 transposase assays require thousands to millions of fresh cells for comprehensive chromatin mapping. Applying Tn5 tagmentation to hundreds of cells results in sparse chromatin maps. We present a transposome hypersensitive sites sequencing assay for highly sensitive characterization of chromatin accessibility. Linear amplification of accessible DNA ends with in vitro transcription, coupled with an engineered Tn5 super-mutant, demonstrates improved sensitivity on limited input materials, and accessibility of small regions near distal enhancers, compared with ATAC-seq.

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Sos, B. C., Fung, H. L., Gao, D. R., Osothprarop, T. F., Kia, A., He, M. M., & Zhang, K. (2016). Characterization of chromatin accessibility with a transposome hypersensitive sites sequencing (THS-seq) assay. Genome Biology, 17(1). https://doi.org/10.1186/s13059-016-0882-7

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