CTCF ChIP-Seq in a panel of 18 cell lines related to ovarian cancer
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA1089603 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR28389400_1.fastq.gz | Fastqsanger.gz | |||
| SRR28389400_2.fastq.gz | Fastqsanger.gz | |||
| SRR28389401_1.fastq.gz | Fastqsanger.gz | |||
| SRR28389401_2.fastq.gz | Fastqsanger.gz | |||
| SRR28389402_1.fastq.gz | Fastqsanger.gz |
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Project description:CTCF ChIP-Seq was generated in a panel of 18 ovarian cancer cell lines to identify active regulatory elements in the genome.
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Project description:Catalytic activity of the ISWI family of remodelers is critical for nucleosomal organization and transcription factor binding, including the insulator protein CTCF. To define which subcomplex mediates these diverse functions we phenotyped a panel of isogenic mouse stem cell lines each lacking one of six ISWI accessory subunits. Individual deletions of either CERF, RSF1, ACF, WICH or NoRC subcomplexes only moderately affect the chromatin landscape, while removal of the NURF-specific subunit BPTF leads to drastic reduction in chromatin accessibility and Snf2h ATPase localization around CTCF sites. While this reduces distances to the adjacent nucleosomes it only modestly impacts CTCF binding itself. In absence of accessibility, the insulator function of CTCF is nevertheless impaired resulting in lower occupancy of cohesin and cohesin-loading factors, and reduced insulation at these sites, highlighting the need of NURF-mediated remodeling for open chromatin and proper CTCF function. Our comprehensive analysis reveals a specific role for NURF in mediating Snf2h localization and chromatin opening at bound CTCF sites showing that local accessibility is critical for cohesin binding and insulator function.
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