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The chicken erythrocyte epigenome

ABSTRACT: This SuperSeries is composed of the SubSeries listed below.

ORGANISM(S): Gallus gallus

PROVIDER: GSE75955 | GEO | 2016/01/01

SECONDARY ACCESSION(S): PRJNA305808

REPOSITORIES: GEO

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The chicken erythrocyte epigenome

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Project description:Transcriptional regulation is impacted by multiple layers of genome organization. A general feature of transcriptionally active chromatin is sensitivity to DNase I and association with acetylated histones. However, very few of these active DNase I-sensitive domains, such as the chicken erythrocyte ?-globin domain, have been identified and characterized. In chicken polychromatic erythrocytes, dynamically acetylated histones associated with DNase I-sensitive, transcriptionally active chromatin prevent histone H1/H5-induced insolubility at physiological ionic strength.Here, we identified and mapped out all the transcriptionally active chromosomal domains in the chicken polychromatic erythrocyte genome by combining a powerful chromatin fractionation method with next-generation DNA and RNA sequencing. Two classes of transcribed chromatin organizations were identified on the basis of the extent of solubility at physiological ionic strength. Highly transcribed genes were present in multigenic salt-soluble chromatin domains ranging in length from 30 to over 150 kb. We identified over 100 highly expressed genes that were organized in broad dynamically highly acetylated, salt-soluble chromatin domains. Highly expressed genes were associated with H3K4me3 and H3K27ac and produced discernible antisense transcripts. The moderately- and low-expressing genes had highly acetylated, salt-soluble chromatin regions confined to the 5' end of the gene.Our data provide a genome-wide profile of chromatin signatures in relation to expression levels in chicken polychromatic erythrocytes.

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