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Redundant and specific roles of cohesin STAG subunits in chromatin looping and transcription control (ChiP-Seq 2)

ABSTRACT: Redundant and specific roles of cohesin STAG subunits in chromatin looping and transcription control (ChiP-Seq 2)

PROVIDER: PRJNA590769 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR10503145.fastq.gz	Fastqsanger.gz
	SRR10503146.fastq.gz	Fastqsanger.gz

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Redundant and specific roles of cohesin STAG subunits in chromatin looping and transcription control (ChiP-Seq 2)

Project description:Cohesin is a ring-shaped multiprotein complex that is crucial for 3D genome organization and transcriptional regulation during differentiation and development. It also confers sister chromatid cohesion and facilitates DNA damage repair. Besides its core subunits SMC3, SMC1A and RAD21, cohesin contains in somatic cells one of two orthologous STAG subunits, STAG1 or STAG2. How these variable subunits affect the function of the cohesin complex is still unclear. STAG1- and STAG2-cohesin were initially proposed to organize cohesion at telomeres and centromeres, respectively. Here, we uncover redundant and specific roles of STAG1 and STAG2 in gene regulation and chromatin looping using HCT116 cells with an auxin-inducible degron (AID) tag fused to either STAG1 or STAG2. Following rapid depletion of either subunit, we perform high resolution Hi-C, RNA-sequencing and sequential ChIP studies to show that STAG1 and STAG2 do not co-occupy individual binding sites and have distinct ways how they affect looping and gene expression. These findings are supported at the single cell level by single-molecule localizations via dSTORM super-resolution imaging. Since somatic and congenital mutations of the STAG subunits are associated with cancer (STAG2) and intellectual disability syndromes with congenital abnormalities (STAG1 and STAG2), we verified STAG1-/STAG2-dependencies using human neural stem cells, hence highlighting their importance for understanding particular disease contexts.

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Project description:This SuperSeries is composed of the SubSeries listed below.

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