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Jumonji C domain-containing protein 12 is a Histone H3 Lysine 27 Demethylase

ABSTRACT: Jumonji C domain-containing protein 12 is a Histone H3 Lysine 27 Demethylase

PROVIDER: PRJNA133807 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR072991.fastq.gz	Fastqsanger.gz
	SRR072992.fastq.gz	Fastqsanger.gz

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CpG islands recruit a histone H3 lysine 36 demethylase

Project description:This SuperSeries is composed of the following subset Series: GSE18588: CpG islands recruit a histone H3 lysine 36 demethylase [Illumina sequencing data] GSE21201: CpG islands recruit a histone H3 lysine 36 demethylase [Agilent data] Refer to individual Series

2010-04-26 | E-GEOD-21202 | biostudies-arrayexpress

Jumonji C domain-containing protein 12 is a Histone H3 Lysine 27 Demethylase

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Jumonji C domain-containing protein 12 is a Histone H3 Lysine 27 Demethylase

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CpG islands recruit a histone H3 lysine 36 demethylase [Illumina sequencing data]

Project description:Eukaryotic gene expression profiles are largely defined by transcription factors that recognize specific DNA sequences in gene regulatory regions and impact RNA polymerase recruitment and transcription. In addition to specific core promoter regulatory elements, up to 70% of genes in higher eukaryotes are also characterized by an overrepresentation of cytosine/guanine base pairs (CpGs) surrounding promoters and gene regulatory units. These features, called CpG islands, were identified over twenty years ago but there remains little mechanistic evidence to suggest how these enigmatic elements contribute to promoter function, with the exception that they are refractory to epigenetic silencing by DNA methylation. Here we uncover a role for CpG islands in buffering gene regulatory elements from repressive histone H3 lysine 36 methylation by directly recruiting the H3K36 specific lysine demethylase enzyme KDM2A. KDM2A is recruited to CpG islands by a zinc finger CxxC (ZF-CxxC) domain that specifically recognizes CpG DNA and is blocked by DNA methylation. This capacity to sense the epigenetic methylation state of DNA constrains KDM2A to non-methylated CpG islands. Importantly, these observations suggest CpG islands may function to delineate gene regulatory elements from bulk chromatin by recruiting factors that create unique chromatin architecture. This study provides information about binding of lysine demethylase enzyme KDM2A in mouse embryonic stem cells.

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Project description:Normal cell type specific histone H3 lysine 27 trimethylation of miRNA genes. HMEC and HMF represent two distinct differentiated cell type present in mammary gland each with a distinct phenotype, a distinct epigenotype as well as distinct miRNA expression pattern. The aim of the study was to determine how epigenetic modifications including histone H3 lysine 27 trimethylation affect miRNA expression. Two cell types HMEC vs. HMF. Biological replicates: 3 pairs of HMEC-HMF of 3 distinct genotypes. Immunoprecipitation using anti-histone H3 trimethylated at lysine 27 (07-449, Millipore).

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