Similar Datasets
Project description:Genome-wide maps of H2Bub and H2B states
| PRJNA429770 | ENA
Project description:We compare patterns of H3K79me and H2Bub across genes in budding yeast
2019-06-13 | GSE107331 | GEO
Project description:we report a novel strategy to detect targeted protein and its PTM isoforms in single cells. We barcode the proteins from single cells by tagging them with oligonucleotides, pool barcoded cells together, run bulk gel electrophoresis to separate protein and its PTM isoform and quantify their abundances by sequencing the oligonucleotides associated with each protein species. We used this strategy to measure histone protein H2B and its monoubiquitination isoform, H2Bub, in single yeast cells. Our results revealed the heterogeneities of H2B ubiquitination levels in single cells from different cell-cycle stages, which is obscured in ensemble measurements.
2020-07-02 | GSE153605 | GEO
Project description:The Mediator complex orchestrates multiple transcription factors with the Pol II apparatus for precise transcriptional control. However, its interplay with the surrounding chromatin remains poorly understood. Here, we analyze differential histone modifications between WT and MED23-/- (KO) cells and identify H2B mono-ubiquitination at lysine 120 (H2Bub) as a MED23-dependent histone modification. Using tandem affinity purification and mass spectrometry, we find that MED23 associates with the RNF20/40 complex, the enzyme for H2Bub, and show that this association is critical for the recruitment of RNF20/40 to chromatin. In a cell-free system, Mediator directly and substantially increases H2Bub on recombinant chromatin through its cooperation with RNF20/40 and the PAF complex. Integrative genome-wide analyses show that MED23 depletion specifically reduces H2Bub on a subset of MED23-contolled genes. Importantly, MED23-coupled H2Bub levels are oppositely regulated during myogenesis and lung carcinogenesis. In sum, these results establish a mechanistic link between the Mediator complex and a critical chromatin modification in coordinating transcription with cell growth and differentiation. To examine the enrichment of H2B ubiquitination, Pol II, H3K4me3, H3K79me3 in WT and KO MED23 MEF cells, we performed H2Bub ChIP-seq, Pol II ChIP-seq, H3K4me3 ChIP-seq and H3K79me3 ChIP-seq assays. 10 high-throughput sequencing data were deposited and WT, KO input data were controls for peak calling.
2015-09-16 | E-GEOD-59518 | biostudies-arrayexpress
Project description:In Saccharomyces cerevisiae histone H2B is ubiquitylated at lysine 123. The SAGA complex component, Ubp8, is one of two proteases that remove this ubiquitin moiety. We analyzed gene expression in a strain containing a variant of histone H2B with lysine 123 converted to arginine to address the mechanisms by which ubiquitylation and deubiquitylation of histone H2B affects gene expression. We show that changes in gene expression observed upon deletion of ubp8 are suppressed by htb1K123R. This provides genetic evidence that Ubp8 alters gene expression through deubiquitylation of histone H2B. Second, microarray analyses of the htb1K123R strain show that loss of histone ubiquitylation results in a two-fold or greater change in expression of ~1.5% of the protein coding genes with greater than two-thirds increasing. For genes in which ubiquitylation represses expression, ubiquitylation principally acts through its effects on histone methylation. In contrast, decreased expression of the CWP1 gene was not paralleled by deletions of the methyltransferase components Swd3, Set2 or Dot1 and is thus likely independent of methylation. Finally, by comparing gene expression changes in the htb1K123R strain with those in a strain deleted for rad6, we conclude that lysine 123 affects transcription primarily because of its being a site of ubiquitylation. Keywords: yeast, histone ubiquitylation, Ubp8, gene expression, genetic modification, histone H2B
2007-01-19 | GSE6316 | GEO
Project description:Genome-wide maps of H3K79me and H2Bub states
| PRJNA419772 | ENA
Project description:In Saccharomyces cerevisiae histone H2B is ubiquitylated at lysine 123. The SAGA complex component, Ubp8, is one of two proteases that remove this ubiquitin moiety. We analyzed gene expression in a strain containing a variant of histone H2B with lysine 123 converted to arginine to address the mechanisms by which ubiquitylation and deubiquitylation of histone H2B affects gene expression. We show that changes in gene expression observed upon deletion of ubp8 are suppressed by htb1K123R. This provides genetic evidence that Ubp8 alters gene expression through deubiquitylation of histone H2B. Second, microarray analyses of the htb1K123R strain show that loss of histone ubiquitylation results in a two-fold or greater change in expression of ~1.5% of the protein coding genes with greater than two-thirds increasing. For genes in which ubiquitylation represses expression, ubiquitylation principally acts through its effects on histone methylation. In contrast, decreased expression of the CWP1 gene was not paralleled by deletions of the methyltransferase components Swd3, Set2 or Dot1 and is thus likely independent of methylation. Finally, by comparing gene expression changes in the htb1K123R strain with those in a strain deleted for rad6, we conclude that lysine 123 affects transcription primarily because of its being a site of ubiquitylation. Keywords: yeast, histone ubiquitylation, Ubp8, gene expression, genetic modification, histone H2B Two dye-swapped, biological replicate experiments were performed for yeast strains CY1272(Htb1_K123R;htb2_delta0), BY10809(ubp8_delta0) and CY1383(Htb1_K123R;htb2_delta0;ubp8_delta0) with reference to BY4742(wt). Three biological replicates, including one dye-swap experiment, were performed comparing CY1272(Htb1_K123R;htb2_delta0) to BY13026(htb2_delta0).
2010-09-15 | E-GEOD-6316 | biostudies-arrayexpress
Project description:In eukaryotes, chromatin-based mechanisms superimpose with DNA sequence information to determine the transcriptional output of the genome. Therefore, evaluating the role of chromatin modifications in the regulation of gene expression is key to understand the contribution of chromatin state variations to development. Recent studies identified several transcriptional coactivators that contribute to selectively regulate cellular pathways by coordinating histone H2B monoubiquitination (H2Bub) with other histone modifications. Although H2Bub is present on a large number of genes, loss of H2B monoubiquitination activity was shown to affect RNA steady levels for a small subset of genes and therefore its influence on gene expression is not well understood. In this study we assessed the impact of H2Bub on dynamic expression changes during a rapid developmental tranistion that initiates only when exposing plants to light. This revealed that H2Bub deposition is highly dynamic in a genomic context. Furthermore, plants lacking histone H2B monoubiquitination activity were impaired for rapid changes of RNA levels for a large repertoire of genes, indicating that H2Bub is important for attaining appropriate expression levels /in fine/. Finally, the detection power of the genomic approach has allowed us to define a set of genes impacted by H2Bub dynamics for rapid changes in RNA levels. The purpose of this study was to integrate the genome-wide distribution of H2Bub chromatin mark together with transcriptome profiles of wild-type and /hub1 /mutant plants (accession GSE21922) at three time points during early photomorphogenesis H2Bub epigenome in 5-day-old dark-grown seedlings, H2Bub epigenome in 5-day-old dark-grown seedlings +1h light, and H2Bub epigenome in 5-day-old dark-grown seedlings +6h light 2 biological replicates for each time point in dye-swap - ChIP-chip
2013-03-13 | E-GEOD-36515 | biostudies-arrayexpress
Project description:Using next-generation sequencing to measure the histone protein H2B and monoubiquitinated H2B (H2Bub) in single yeast cells
| PRJNA643412 | ENA
Project description:In eukaryotes, chromatin-based mechanisms superimpose with DNA sequence information to determine the transcriptional output of the genome. Therefore, evaluating the role of chromatin modifications in the regulation of gene expression is key to understand the contribution of chromatin state variations to development. Recent studies identified several transcriptional coactivators that contribute to selectively regulate cellular pathways by coordinating histone H2B monoubiquitination (H2Bub) with other histone modifications. Although H2Bub is present on a large number of genes, loss of H2B monoubiquitination activity was shown to affect RNA steady levels for a small subset of genes and therefore its influence on gene expression is not well understood. In this study we assessed the impact of H2Bub on dynamic expression changes during a rapid developmental tranistion that initiates only when exposing plants to light. This revealed that H2Bub deposition is highly dynamic in a genomic context. Furthermore, plants lacking histone H2B monoubiquitination activity were impaired for rapid changes of RNA levels for a large repertoire of genes, indicating that H2Bub is important for attaining appropriate expression levels /in fine/. Finally, the detection power of the genomic approach has allowed us to define a set of genes impacted by H2Bub dynamics for rapid changes in RNA levels. The purpose of this study was to integrate the genome-wide distribution of H2Bub chromatin mark together with transcriptome profiles of wild-type and /hub1 /mutant plants (accession GSE21922) at three time points during early photomorphogenesis
2013-03-13 | GSE36515 | GEO