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ChIP-Seq for NIPBL for SMC1 in human lymphoblastoid cells (hLCLs)

ABSTRACT: The gene expression program is regulated by a cell-type specific chromosome architecture. The connection between enhancer and promoter regions is dependent on a protein complex containing Nipbl, Mediator and Cohesin. To gain insights into the chromosome architecture of human differentiated cells, we profiled NIPBL and SMC1 in lymphoblastoid cells (LCLs).

ORGANISM(S): Homo sapiens

PROVIDER: GSE38395 | GEO | 2012/06/01

SECONDARY ACCESSION(S): PRJNA167811

REPOSITORIES: GEO

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ChIP-Seq for NIPBL for SMC1 in human lymphoblastoid cells (hLCLs)

Project description:The gene expression program is regulated by a cell-type specific chromosome architecture. The connection between enhancer and promoter regions is dependent on a protein complex containing Nipbl, Mediator and Cohesin. To gain insights into the chromosome architecture of human differentiated cells, we profiled NIPBL and SMC1 in lymphoblastoid cells (LCLs). DNA was enriched from hLCLs and chromatin immunoprecipitations (ChIPs) were analyzed by Solexa sequencing. ChIPs were performed using an antibody against NIPBL and SMC1. Whole cell extract is provided for background.

2012-06-01 | E-GEOD-38395 | biostudies-arrayexpress

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Project description:ChIP-Seq for NIPBL for SMC1 in human lymphoblastoid cells (hLCLs)

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Calcium Signaling Prompts NIPBL Recruitment at Active Enhancers and Promoters via Distinct Mechanisms to Reconstruct Genome Compartmentalization

Project description:During developmental progression the genomes of immune cells undergo large-scale changes in chromatin folding. However, insights into the signals and epigenetics that induce alterations in nuclear architecture remain rudimentary. Here, we found that calcium influx rapidly recruited the cohesin-loading factor NIPBL to thousands of binding sites to dictate widespread changes in compartment segregation. The induction of NIPBL-binding was coordinate with increased P300, BRG1 and RNA Polymerase II co-occupancy, via different kinetics at active enhancers and promoters. Through acute degradation system, we found that enhancers, rather than promoters, are dependent on BAF complexes to induce NIPBL recruitment. Finally, we found that calcium signaling acts universally to orchestrate rapid redistribution of NIPBL in both primary innate and adaptive immune cells. Collectively, these data reveal how calcium signaling regulates NIPBL occupancy to orchestrate nuclear architecture.

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2023-03-12 | PXD040240 | Pride

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MAU2 and NIPBL variants in Cornelia de Lange syndrome reveal MAU2-independent loading of cohesin and uncover protective mechanisms against early truncating mutations in NIPBL

Project description:For its association with chromatin, the cohesin complex depends on a heterodimer formed by NIPBL and MAU2. Variants in NIPBL are the main cause of CdLS and result in NIPBL haploinsufficiency. Using CRISPR, we generated cells homozygous for an out-of-frame duplication in NIPBL. Remarkably, alternative translation initiation rescued NIPBL expression in these cells and produced an N-terminally truncated NIPBL that lacks MAU2-interaction domain, causing a dramatic reduction of MAU2 protein levels while a lot of NIPBL functions remain intact.

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