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Histone acetylation H2BK20ac marks cell-state specific active regulatory elements

ABSTRACT: Histone acetylation H2BK20ac marks cell-state specific active regulatory elements

PROVIDER: PRJNA295265 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR2338350.fastq.gz	Fastqsanger.gz
	SRR2338360.fastq.gz	Fastqsanger.gz
	SRR2338370.fastq.gz	Fastqsanger.gz
	SRR2338351.fastq.gz	Fastqsanger.gz
	SRR2338361.fastq.gz	Fastqsanger.gz

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Histone acetylation H2BK20ac marks cell-state specific active regulatory elements

Project description:Characterisation of different histone modifications is crucial to understand gene regulation. In order to study the most predictive histone modification for active enhancers we created unbiased set of enhancers and used machine learning approach. Our approach revealed an unconventional histone modification H2BK20ac as most efficient marker of active enhancers. H2BK20ac also showed superior coverage of tissue specific active enhancers in complex invivo samples. Adding H2BK20ac to set of conventional histone modifications lead to identification of new chromatin state which could be active enhancers. H2BK20ac tends to occur only at cell-type specific active promoters and showed higher specificity for related disease mutations than H3K27ac and other histone modifications. Using transient state of BV2 microglia cells after lipopolysaccharide based activation, we found that H2BK20ac also marks cell-state specific cis-regulatory elements. Further analysis using inhibition of TGF-beta pathway in BV2 cells and LPS stimulation, revealed differential patterns of H2BK20ac and H3K27ac at genome locations associated with opposite roles response to stmulation. Our study about H2BK20ac hints about a new mechanism of regulation of cell-type specificity and a distinct mode of action of pathways to maintain balance between cell-responses. Chip-seq of H2BK20ac and other histone modifcation was performed in 3 cell types and embryonic mouse forebrain. The sensitivity for active enhancers was compared for different histone modification ChIP-seq.The level of H2BK20ac at promoters and enhancers was assesed for relationship to cell-type specific expression. H2BK20ac signals were also analysed during cell-state transition when microgila are stimulated by LPS

2016-02-25 | E-GEOD-72886 | biostudies-arrayexpress

Histone acetylation H2BK20ac marks cell-state specific active regulatory elements

2016-02-25 | GSE72886 | GEO

Acetylation of histone H2B marks active enhancers and predicts CBP/p300 target genes

Project description:Chromatin features are widely used for genome-scale mapping of enhancers. However, discriminating active enhancers from other cis-regulatory elements, predicting enhancer strength, and identifying their target genes remains challenging. Here we establish histone H2B N-terminus multisite lysine acetylation (H2BNTac) as a genuine signature of active enhancers. H2BNTac prominently marks candidate active enhancers and a subset of promoters and discriminates them from ubiquitously active promoters. Two mechanisms afford the distinct H2BNTac specificity. (1) Unlike H3K27ac, H2BNTac is specifically catalyzed by CBP/p300. (2) H2A-H2B, but not H3-H4, are rapidly exchanged through transcription-induced nucleosome remodeling. H2BNTac-positive candidate enhancers show a high validation rate in orthogonal enhancer activity assays, and a vast majority of endogenously active enhancers are marked by H2BNTac and H3K27ac. Notably, H2BNTac intensity predicts enhancer strength and outperforms the current state-of-the-art models in predicting CBP/p300 target genes. These findings have broad implications for generating fine-grained enhancer maps and modeling CBP/p300-dependent gene regulation.

2023-02-23 | GSE186349 | GEO

Acetylation of histone H2B marks active enhancers and predicts CBP/p300 target genes

Project description:Acetylation of histone H2B marks active enhancers and predicts CBP/p300 target genes

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H4K16 acetylation marks active genes and enhancers of embryonic stem cells, but does not alter chromatin compaction (I) [ChIP-Seq]

Project description:We report that acetylation of H4K16 is a new marker of active enhancers and that some enhancers are marked by H3K4me1, MOF and H4K16ac but not by acetylated H3K27 or p300, suggesting that they are novel p300-independent regulatory elements. ChIP-seq for H4K16 acetylation in undifferentiated ES cells, and cells after 3 days of retinoic acid differentiation, along with MNase digested input for both samples

2013-08-23 | E-GEOD-43102 | biostudies-arrayexpress

H4K16 acetylation marks active genes and enhancers of embryonic stem cells, but does not alter chromatin compaction (II) [ChIP-Seq]

Project description:We report that acetylation of H4K16 is a new marker of active enhancers and that some enhancers are marked by H3K4me1, MOF and H4K16ac but not by acetylated H3K27 or p300, suggesting that they are novel p300-independent regulatory elements. ChIP-seq for H4K16 acetylation in undifferentiated 46c(sox1-gfp) ES cells, and FACS sorted day 5 Neural Progenitor Cells (differentiated with NB27 and Neuro2 medium supplements) , along with MNase digested input for both samples

2013-08-23 | E-GEOD-47761 | biostudies-arrayexpress

H3K18la marks active tissue-specific enhancers

Project description:H3K18la marks active tissue-specific enhancers

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H4K16 acetylation marks active genes and enhancers of embryonic stem cells, but does not alter chromatin compaction [NimbleGen array]

2013-08-23 | GSE47762 | GEO

H4K16 acetylation marks active genes and enhancers of embryonic stem cells, but does not alter chromatin compaction [Agilent array]

2013-08-23 | GSE47716 | GEO

Dynamic competing histone H4 K5K8 acetylation and butyrylation are hallmarks of highly active gene promoters

Project description:Newly discovered histone lysine acylations increase the functional diversity of nucleosomes well beyond acetylation. Here, we focus on histone butyrylation in the context of sperm cell differentiation. Specifically, we investigate the butyrylation of histone H4 lysine 5 and 8 at gene promoters, where acetylation guides the binding of Brdt, a bromodomain-and-extra-terminal protein, thereby mediating stage-specific gene expression programs. Genome-wide mapping data show that highly active Brdt-bound gene promoters systematically harbour competing histone acetylation and butyrylation marks at H4 K5 and K8. Histone butyrylation, despite acting as a direct stimulator of transcription, competes with acetylation, especially at H4 K5, to prevent Brdt binding. The observed in vivo H4 K5K8 acetylation butyrylation state at active promoters is reproduced in vitro where p300 indistinctly acetylates and butyrylates H4 K5 and K8. Altogether, highly active gene promoter regions are characterized by alternating H4 acetylation and butyrylation sustaining direct gene activation and a dynamic bromodomain binding.

2016-07-13 | GSE77277 | GEO

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