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Dissection of nucleosome remodeling at cis-regulatory elements in stimulated macrophages

ABSTRACT: Dissection of nucleosome remodeling at cis-regulatory elements in stimulated macrophages

PROVIDER: PRJNA490018 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR7811570.fastq.gz	Fastqsanger.gz
	SRR7811580.fastq.gz	Fastqsanger.gz
	SRR7811590.fastq.gz	Fastqsanger.gz
	SRR7811600.fastq.gz	Fastqsanger.gz
	SRR7811610.fastq.gz	Fastqsanger.gz

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Project description:Dynamic control of the accessibility of the genomic regulatory information is at the heart of stimulus-induced gene expression changes. Whereas chromatin accessibility assays describe dynamic changes in open chromatin over time, they provide only indirect and limited information on the nucleosome remodeling events that underlie such changes. Here, we combined accessibility assays and ChIP-seq on nucleosomes generated by micrococcal nuclease digestion in resting and LPS-activated macrophages. We devised a novel quantitative framework to discriminate different types of nucleosome remodeling events and used it to analyze nucleosome organization at genomic cis-regulatory elements modulated by stimulation on a genomic scale. At typical stimulus-activated enhancers, remodeling events were commonly asymmetric, with only one of the two nucleosomes flanking the central accessible region being remodeled. A systematic analysis of nucleosome organization revealed distinct associations of individual TFs with remodeling and showed that most remodeling events tended to occur early in the response and to be maintained over time, with progressively fewer novel events occurring at later times.

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