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BAP1 constrains pervasive H2AK119ub1 to control the transcriptional potential of the genome.

ABSTRACT: BAP1 constrains pervasive H2AK119ub1 to control the transcriptional potential of the genome.

PROVIDER: PRJNA680277 | ENA |

REPOSITORIES: ENA

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BAP1 constrains pervasive H2AK119ub1 to control the transcriptional potential of the genome [ChIP-seq]

Project description:Histone-modifying systems play fundamental roles in gene regulation and the development of multicellular organisms. Histone modifications that are enriched at gene regulatory elements have been heavily studied, but the function of modifications found more broadly throughout the genome remains poorly understood. This is exemplified by histone H2A monoubiquitylation (H2AK119ub1), which is enriched at Polycomb-repressed gene promoters but also covers the genome at lower levels. Here, using inducible genetic perturbations and quantitative genomics, we found that the BAP1 deubiquitylase plays an essential role in constraining H2AK119ub1 throughout the genome. Removal of BAP1 leads to pervasive genome-wide accumulation of H2AK119ub1, which causes widespread reductions in gene expression. We show that elevated H2AK119ub1 preferentially counteracts Ser5 phosphorylation on the C-terminal domain of RNA polymerase II at gene regulatory elements and causes reductions in transcription and transcription-associated histone modifications. Furthermore, failure to constrain pervasive H2AK119ub1 compromises Polycomb complex occupancy at a subset of Polycomb target genes, which leads to their derepression, providing a potential molecular rationale for why the BAP1 ortholog in Drosophila has been characterized as a Polycomb group gene. Together, these observations reveal that the transcriptional potential of the genome can be modulated by regulating the levels of a pervasive histone modification.

2021-05-03 | GSE161993 | GEO

BAP1 constrains pervasive H2AK119ub1 to control the transcriptional potential of the genome [RNA-seq]

2021-05-03 | GSE161995 | GEO

BAP1 constrains pervasive H2AK119ub1 to control the transcriptional potential of the genome [ATAC-seq]

2021-05-03 | GSE161994 | GEO

BAP1 constrains pervasive H2AK119ub1 to control the transcriptional potential of the genome [ChIP-seq]

Project description:BAP1 constrains pervasive H2AK119ub1 to control the transcriptional potential of the genome [ChIP-seq]

| PRJNA680290 | ENA

BAP1 constrains pervasive H2AK119ub1 to control the transcriptional potential of the genome [RNA-seq]

Project description:BAP1 constrains pervasive H2AK119ub1 to control the transcriptional potential of the genome [RNA-seq]

| PRJNA680291 | ENA

BAP1 constrains pervasive H2AK119ub1 to control the transcriptional potential of the genome [ATAC-seq]

Project description:BAP1 constrains pervasive H2AK119ub1 to control the transcriptional potential of the genome [ATAC-seq]

| PRJNA680292 | ENA

BAP1 constrains pervasive H2AK119ub1 to control the transcriptional potential of the genome.

Project description: Not available

| S-EPMC8091973 | biostudies-literature

H2AK119ub1 and H3K27me3 ChIP-seq in conditional knockout of Bap1

Project description:ChIP-seq of H2AK119ub1 and H3K27me3 in a conditional knockout of Bap1

2023-01-01 | GSE211544 | GEO

BAP1 activity regulates Polycomb occupancy and global chromatin condensation counteracting diffuse PCGF3/5-dependent H2AK119ub1 deposition

Project description:BAP1 is recurrently mutated or deleted in a large number of diverse cancer types, including mesothelioma, uveal melanoma and hepatocellular cholangiocarcinoma. BAP1 is the catalytic subunit of the Polycomb Repressive De-Ubiquitination complex (PR-DUB) which removes PRC1 mediated H2AK119ub1. We and others have shown that H2AK119ub1 is essential for maintaining transcriptional repression and contributes to PRC2 chromatin recruitment. However, the precise relationship between BAP1 and PRC1 remains mechanistically elusive. Using embryonic stem cells, we show that a major function of BAP1 is to restrict H2AK119ub1 deposition to target sites. This increases the stability of PcG complexes with their targets and prevents diffuse accumulation of H2AK119ub1 and H3K27me3 modifications. Loss of BAP1 results in a broad increase in H2AK119ub1 levels that are primarily dependent on PCGF3/5-PRC1 complexes with a mechanism that is reminiscent of X-chromosome inactivation. Increased genome-wide H2AK119ub1 levels titrates away PRC2 from its targets and stimulates diffuse H3K27me3 accumulation across the genome. This decreases the activity of PcG repressive machineries at physiological targets and induces a general compaction of the entire chromatin. Our findings provide evidences for a unifying model that resolves the apparent contradiction between BAP1 catalytic activity and its role in vivo, uncovering molecular vulnerabilities that could be useful for BAP1-related pathologies.

2021-06-27 | GSE162739 | GEO

BAP1 constrains pervasive H2AK119ub1 to control the transcriptional potential of the genome.

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

2021-05-03 | GSE161996 | GEO