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Homo sapiens

ABSTRACT: Changes in global nucleosome positioning during human embryonic stem cell differentiation

PROVIDER: PRJNA196743 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR830684_1.fastq.gz	Fastqsanger.gz
	SRR830684_2.fastq.gz	Fastqsanger.gz
	SRR831188_1.fastq.gz	Fastqsanger.gz
	SRR831188_2.fastq.gz	Fastqsanger.gz
	SRR832927_1.fastq.gz	Fastqsanger.gz

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Project description:We determined genome-wide nucleosome occupancy in mouse embryonic stem cells and their neural progenitor and embryonic fibroblast counterparts to assess features associated with nucleosome positioning during lineage commitment. Cell type and protein specific binding preferences of transcription factors to sites with either low (e.g. Myc, Klf4, Zfx) or high (e.g. Nanog, Oct4 and Sox2) nucleosome occupancy as well as complex patterns for CTCF were identified. Nucleosome depleted regions around transcription start and termination sites were broad and more pronounced for active genes, with distinct patterns for promoters classified according to their CpG-content or histone methylation marks. Throughout the genome nucleosome occupancy was dependent on the presence of certain histone methylation or acetylation modifications. In addition, the average nucleosome-repeat length increased during differentiation by 5-7 base pairs, with local variations for specific genomic regions. Our results reveal regulatory mechanisms of cell differentiation acting through nucleosome repositioning. We have determined genome-wide nucleosome position maps in mouse embryonic stem cells (ESCs), neural progenitor cells (NPCs) derived from these ESCs by retinoic acid induced differentiation as well as mouse embryonic fibroblasts (MEFs) from the corresponding mouse strain

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