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Dual roles of the Arabidopsis PEAT complex in histone H2A deubiquitination and H4K5 acetylation [RNA-seq]

ABSTRACT: Dual roles of the Arabidopsis PEAT complex in histone H2A deubiquitination and H4K5 acetylation [RNA-seq]

PROVIDER: PRJNA973560 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR24636222_1.fastq.gz	Fastqsanger.gz
	SRR24636222_2.fastq.gz	Fastqsanger.gz
	SRR24636223_1.fastq.gz	Fastqsanger.gz
	SRR24636223_2.fastq.gz	Fastqsanger.gz
	SRR24636224_1.fastq.gz	Fastqsanger.gz

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Dual roles of the Arabidopsis PEAT complex in histone H2A deubiquitination and H4K5 acetylation [RNA-seq]

Project description:Histone H2A monoubiquitination is associated with transcriptional repression and needs to be removed by deubiquitinases to facilitate gene transcription in eukaryotes. However, the deubiquitinase responsible for genome-wide H2A deubiquitination in plants has yet to be identified. We found that UBP5, an ubiquitin-specific protease, interacts with a previously identified PEAT (PWWP-EPCR-ARID-TRB) complex to form a larger version of PEAT complex in Arabidopsis thaliana. UBP5 functions as an H2A deubiquitinase in a nucleosome substrate-dependent manner in vitro and mediates H2A deubiquitination at the whole-genome level in vivo. Moreover, our results indicated that the histone acetyltransferases HAM1 and HAM2 (HAM1/2), catalytic subunits of the NuA4 histone acetyltransferase complex, are also part of the PEAT complex at PEAT target genomic loci. Within the PEAT complex, the PWWP components (PWWP1, PWWP2 and PWWP3) directly interact with UBP5 and are necessary for UBP5-mediated H2A deubiquitination, while the EPCR components (EPCR1 and EPCR2) directly interact with HAM1/2 and are required for HAM1/2-mediated H4K5 acetylation. This study identifies previously unknown regulators of H2A deubiquitination and H4K5 acetylation and illustrates how these processes collaborate at the whole-genome level.

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Dual roles of the Arabidopsis PEAT complex in histone H2A deubiquitination and H4K5 acetylation [ChIP-seq]

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Dual roles of the Arabidopsis PEAT complex in histone H2A deubiquitination and H4K5 acetylation

Project description:Dual roles of the Arabidopsis PEAT complex in histone H2A deubiquitination and H4K5 acetylation

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Dual roles of the Arabidopsis PEAT complex in histone H2A deubiquitination and H4K5 acetylation [ChIP-seq]

Project description:Dual roles of the Arabidopsis PEAT complex in histone H2A deubiquitination and H4K5 acetylation [ChIP-seq]

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Dual roles of the Arabidopsis PEAT complex in histone H2A deubiquitination and H4K5 acetylation

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Metabolically controlled histone H4K5 acylation/acetylation ratio drives BRD4 genomic distribution VII

Project description:In addition to acetylation, histones are modified by a series of competing longer chain acylations. Most of these acylation marks are enriched and co-exist with acetylation on active gene regulatory elements. Their seemingly redundant functions have hindered the understanding of histone acylations’ specific roles. Here, by using an acute lymphoblastic leukaemia (ALL) cell model and blasts from B-ALL patients, we demonstrate a role for mitochondrial activity in controlling histone acylation/acetylation ratio, especially at H4K5. An increase of the crotonylation and butyrylation over acetylation on H4K5 weakens BRD4-chromatin interaction and increases BRD4 nuclear mobility and availability for binding transcription start site associated nucleosome free regions of active genes. Our data suggest that, with regard to BRD4 dynamics, histone acylations including acetylation, should be considered collectively. A metabolism dependant control of the histone acetylation/longer chain acylation(s) ratio could constitute a common mechanism regulating bromodomain factors’ “reservoir” pool, availability and functional genomic distribution.

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