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Replication-independent histone turnover confers regulatory genome for adult heart homeostasis

ABSTRACT: Replication-independent histone turnover confers regulatory genome for adult heart homeostasis

PROVIDER: PRJNA404042 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR6025010.fastq.gz	Fastqsanger.gz
	SRR6025020.fastq.gz	Fastqsanger.gz
	SRR6025001.fastq.gz	Fastqsanger.gz
	SRR6025011.fastq.gz	Fastqsanger.gz
	SRR6025021.fastq.gz	Fastqsanger.gz

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Replication-independent histone turnover confers regulatory genome for adult heart homeostasis [ChIP-Seq]

Project description:Disruption and replacement of nucleosomal histone (histone turnover, HT) take place during transcription and cell division. Here we examined the functional roles for replication-independent HT in directing precise regulatory genome in terminally differentiated cardiomyocytes (CMs) of adult heart. Surprisingly, histone H2B pausing and chasing assay revealed the histone halftime ~2.5 weeks in non-replicating CMs, in sharp contrast to the longer halftime of CMs, despite in the abscence of replication-dependent passive dilution of labeled histones. Regions of high HT identified enhancers of important heart function. Co-occupancy of mutiple cardiac transcription factors in part accounted for enhancers on sites lacking nucleosome eviction by passage of RNA polymerase II. Unexpectedly, both polycomb EED and HDACs augmented HT rate in bufferring poised enhancer activition without alteration of nucleosome occupancy. Thus, our results suggest replication-indenpendent HT as an additional layer of chromatin-based regulation of functional homeostasis.

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Project description:Using a recently established histone turnover sensor, we measured the genome-wide H3 turnover during S-phase in S.cerevisiae.

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