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. 2013 Mar;8(3):539-54.
doi: 10.1038/nprot.2013.023. Epub 2013 Feb 21.

High-throughput Chromatin Immunoprecipitation for Genome-Wide Mapping of in Vivo protein-DNA Interactions and Epigenomic States

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High-throughput Chromatin Immunoprecipitation for Genome-Wide Mapping of in Vivo protein-DNA Interactions and Epigenomic States

Ronnie Blecher-Gonen et al. Nat Protoc. .

Abstract

Dynamic protein binding to DNA elements regulates genome function and cell fate. Although methods for mapping in vivo protein-DNA interactions are becoming crucial for every aspect of genomic research, they are laborious and costly, thereby limiting progress. Here we present a protocol for mapping in vivo protein-DNA interactions using a high-throughput chromatin immunoprecipitation (HT-ChIP) approach. By using paramagnetic beads, we streamline the entire ChIP and indexed library construction process: sample transfer and loss is minimized and the need for manually labor-intensive procedures such as washes, gel extraction and DNA precipitation is eliminated. All of this allows for fully automated, cost effective and highly sensitive 96-well ChIP sequencing (ChIP-seq). Sample preparation takes 3 d from cultured cells to pooled libraries. Compared with previous methods, HT-ChIP is more suitable for large-scale in vivo studies, specifically those measuring the dynamics of a large number of different chromatin modifications/transcription factors or multiple perturbations.

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