ChIA-PIPE: A fully automated pipeline for comprehensive ChIA-PET data analysis and visualization.

Lee, Byoungkoo; Wang, Jiahui; Cai, Liuyang; Kim, Minji; Namburi, Sandeep; Tjong, Harianto; Feng, Yuliang; Wang, Ping; Tang, Zhonghui; Abbas, Ahmed; Wei, Chia-Lin; Ruan, Yijun; Li, Sheng

ChIA-PET (chromatin interaction analysis with paired-end tags) enables genome-wide discovery of chromatin interactions involving specific protein factors, with base pair resolution. Interpretation of ChIA-PET data requires a robust analytic pipeline. Here, we introduce ChIA-PIPE, a fully automated pipeline for ChIA-PET data processing, quality assessment, visualization, and analysis. ChIA-PIPE performs linker filtering, read mapping, peak calling, and loop calling and automates quality control assessment for each dataset. To enable visualization, ChIA-PIPE generates input files for two-dimensional contact map viewing with Juicebox and HiGlass and provides a new dockerized visualization tool for high-resolution, browser-based exploration of peaks and loops. To enable structural interpretation, ChIA-PIPE calls chromatin contact domains, resolves allele-specific peaks and loops, and annotates enhancer-promoter loops. ChIA-PIPE also supports the analysis of other related chromatin-mapping data types.