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Coordinated Chromatin Remodeling induced by Demethylation requires SRCAP mediated H2A.Z exchange

ABSTRACT: Coordinated Chromatin Remodeling induced by Demethylation requires SRCAP mediated H2A.Z exchange

PROVIDER: PRJNA136591 | ENA |

REPOSITORIES: ENA

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Coordinated Chromatin Remodeling induced by Demethylation requires SRCAP mediated H2A.Z exchange

Project description:This SuperSeries is composed of the SubSeries listed below. Refer to individual Series

2013-01-01 | E-GEOD-26685 | biostudies-arrayexpress

Coordinated Chromatin Remodeling induced by Demethylation requires SRCAP mediated H2A.Z exchange [expression]

Project description:Genome wide gene expression profiling of RKO cells with combination treatments of non-target siRNA or SRCAP siRNA and PBS or 1uM 5-Aza-CdR treatment. The sample treated with non target siRNA and PBS serves as control sample. Total RNA obtained from isolated RKO cells.

2013-01-01 | E-GEOD-26684 | biostudies-arrayexpress

Coordinated Chromatin Remodeling induced by Demethylation requires SRCAP mediated H2A.Z exchange [Methylation]

Project description:Genome wide DNA methylation profiling of RKO cells with combination treatments of non-target siRNA or SRCAP siRNA and PBS or 1uM 5-Aza-CdR treatment. The Illumina Infinium 27k Human DNA methylation Beadchip v1.2 was used to obtain DNA methylation profiles across 27,578 CpGs in treated RKO cells. Samples included cells under 4 different treatments. The sample treated with non target siRNA and PBS serves as control sample. Bisulphite converted DNA from the 4 samples were hybridised to the Illumina Infinium 27k Human Methylation Beadchip v1.2

2013-01-01 | E-GEOD-26433 | biostudies-arrayexpress

Coordinated Chromatin Remodeling induced by Demethylation requires SRCAP mediated H2A.Z exchange

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

2013-01-01 | GSE26685 | GEO

Recognition of inherently unstable H2A-nucleosome by Swc2 is a major determinant for unidirectional H2A.Z exchange

Project description:The site-specific chromatin incorporation of eukaryotic histone variant H2A.Z is driven by the multi-component chromatin remodeling complex SWR1/SRCAP/ p400. The budding yeast SWR1 complex replaces the H2A-H2B dimer in the canonical nucleosome with the H2A.Z-H2B dimer, but the mechanism governing the directionality of H2A-to-H2A.Z exchange remains elusive. Here, we use single-molecule force spectroscopy to dissect the disassembly/ reassembly of H2A-nucleosome and H2A.Z-nucleosome. We find that the N-terminal 1-135 residues of yeast SWR1-complex-protein-2 (previously termed Swc2-Z) facilitate the disassembly of nucleosomes containing H2A but not H2A.Z. The Swc2-mediated nucleosome disassembly/reassembly requires the inherently unstable H2A-nucleosome, whose instability is conferred by three H2A α2-helix residues Gly47, Pro49 and Ile63 as they selectively weaken the structural rigidity of H2A-H2B dimer. It also requires Swc2-ZN (residues 1-37) that directly anchors to H2A-nucleosome and functions in the SWR1-catalyzed H2A.Z replacement in vitro and yeast H2A.Z deposition in vivo. Our findings providecrucial insights into how SWR1 complex discriminates between the H2A-nucleosome and H2A.Z-nucleosome, establishing a simple paradigm for the governace of unidirectional H2A.Z exchange.

2021-04-12 | GSE171844 | GEO

Homo sapiens

Project description:Coordinated Chromatin Remodeling induced by Demethylation requires SRCAP mediated H2A.Z exchange [expression]

| PRJNA142179 | ENA

Homo sapiens

Project description:Coordinated Chromatin Remodeling induced by Demethylation requires SRCAP mediated H2A.Z exchange [Methylation]

| PRJNA142265 | ENA

Coordinated Chromatin Remodeling induced by Demethylation requires SRCAP mediated H2A.Z exchange [expression]

2013-01-01 | GSE26684 | GEO

Coordinated Chromatin Remodeling induced by Demethylation requires SRCAP mediated H2A.Z exchange [Methylation]

2013-01-01 | GSE26433 | GEO

A histone acetylation switch regulates H2A.Z deposition by the SWR-C remodeling enzyme

Project description:The histone variant H2A.Z plays key roles in gene expression, DNA repair, and centromere function. H2A.Z deposition is controlled by SWR-C chromatin remodeling enzymes that catalyze the nucleosomal exchange of canonical H2A with H2A.Z. Here we report that acetylation of histone H3 lysine 56 (H3-K56Ac) alters the substrate specificity of SWR-C, leading to promiscuous dimer exchange where either H2A.Z or H2A can be exchanged from nucleosomes. This result is confirmed in vivo, where genome-wide analysis demonstrates widespread decreases in H2A.Z levels in yeast mutants with hyperacetylated H3K56. Our work also suggests that a conserved SWR-C subunit may function as a M-bM-^@M-^\lockM-bM-^@M-^] that prevents removal of H2A.Z from nucleosomes. Our study identifies a histone modification that regulates a chromatin remodeling reaction and provides insights into how histone variants and nucleosome turnover can be controlled by chromatin regulators. H2A.Z ChIP seq experiments in mutants with constitutive H3K56ac

2013-04-15 | E-GEOD-43935 | biostudies-arrayexpress

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