Saccharomyces cerevisiae
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA254082 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR1503346.fastq.gz | Fastqsanger.gz | |||
| SRR1503347.fastq.gz | Fastqsanger.gz | |||
| SRR1503348.fastq.gz | Fastqsanger.gz | |||
| SRR1503349.fastq.gz | Fastqsanger.gz | |||
| SRR2156280.fastq.gz | Fastqsanger.gz |
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Similar Datasets
Project description:Acetylation of histone H4 at lysine 44 facilitates meiotic recombination by creating accessible chromatin
| PRJNA254080 | ENA
Project description:Acetylation of histone H4 at lysine 44 facilitates meiotic recombination by creating accessible chromatin [Mnase-seq]
| PRJNA254081 | ENA
Project description:Meiotic recombination hotspots are associated with histone post-translational modifications and open chromatin. However, it remains unclear how histone modifications and chromatin structure directly regulate meiotic recombination. Here, we identify acetylation of histone H4 at Lys44 (H4K44ac) as a new histone modification, occurring on the nucleosomal lateral surface. We show that H4K44ac is specific to yeast sporulation, rising during yeast meiosis and displaying genome-wide enrichment at recombination hotspots in meiosis. The H4K44 residue is required for normal meiotic recombination, for normal levels of double strand breaks during meiosis, and for optimal sporulation. Non-modifiable substitution H4K44R results in reduced MNase digestion and decreased binding of recombination-associated proteins at hotspots. Our results show that H4K44ac creates an accessible chromatin environment for key proteins to facilitate meiotic recombination. Two samples, one WT MNase-seq and one MNase-seq from yeast with a lysine->arginine mutation at H4K44, no replicates Two replicates each of MNase-seq in WT and H4K44->R mutant yeast grown in YPD or YPA.
2015-12-07 | E-GEOD-59004 | biostudies-arrayexpress
Project description:Meiotic recombination hotspots are associated with histone post-translational modifications and open chromatin. However, it remains unclear how histone modifications and chromatin structure directly regulate meiotic recombination. Here, we identify acetylation of histone H4 at Lys44 (H4K44ac) as a new histone modification, occurring on the nucleosomal lateral surface. We show that H4K44ac is specific to yeast sporulation, rising during yeast meiosis and displaying genome-wide enrichment at recombination hotspots in meiosis. The H4K44 residue is required for normal meiotic recombination, for normal levels of double strand breaks during meiosis, and for optimal sporulation. Non-modifiable substitution H4K44R results in reduced MNase digestion and decreased binding of recombination-associated proteins at hotspots. Our results show that H4K44ac creates an accessible chromatin environment for key proteins to facilitate meiotic recombination. One sample, H4K44ac chIP from 4hrs sporulation yeast and one background H4 chIP from the same, two replicates each Two replicates each of H3K4me3 and H3K56ac chIP-seq in WT and H4K44->R mutant yeast, with two replicates of H3 chIP-seq in each genetic background Two replicates each of Rad51 chIP-seq in WT and H4K44->R mutant yeast with a single replicate of accompanying input DNA in each genetic background
2015-12-07 | E-GEOD-59003 | biostudies-arrayexpress
Project description:Meiotic recombination hotspots are associated with histone post-translational modifications and open chromatin. However, it remains unclear how histone modifications and chromatin structure directly regulate meiotic recombination. Here, we identify acetylation of histone H4 at Lys44 (H4K44ac) as a new histone modification, occurring on the nucleosomal lateral surface. We show that H4K44ac is specific to yeast sporulation, rising during yeast meiosis and displaying genome-wide enrichment at recombination hotspots in meiosis. The H4K44 residue is required for normal meiotic recombination, for normal levels of double strand breaks during meiosis, and for optimal sporulation. Non-modifiable substitution H4K44R results in reduced MNase digestion and decreased binding of recombination-associated proteins at hotspots. Our results show that H4K44ac creates an accessible chromatin environment for key proteins to facilitate meiotic recombination.
2015-12-07 | GSE59003 | GEO
Project description:Meiotic recombination hotspots are associated with histone post-translational modifications and open chromatin. However, it remains unclear how histone modifications and chromatin structure directly regulate meiotic recombination. Here, we identify acetylation of histone H4 at Lys44 (H4K44ac) as a new histone modification, occurring on the nucleosomal lateral surface. We show that H4K44ac is specific to yeast sporulation, rising during yeast meiosis and displaying genome-wide enrichment at recombination hotspots in meiosis. The H4K44 residue is required for normal meiotic recombination, for normal levels of double strand breaks during meiosis, and for optimal sporulation. Non-modifiable substitution H4K44R results in reduced MNase digestion and decreased binding of recombination-associated proteins at hotspots. Our results show that H4K44ac creates an accessible chromatin environment for key proteins to facilitate meiotic recombination.
2015-12-07 | GSE59004 | GEO
Project description:Meiotic recombination is initiated by the Spo11 endonuclease, which directs DNA DSBs. We report here that the recombinogenic cores of active hotspots in mice harbor several histone H3 and H4 acetylation and methylation marks that are typical of open, active chromatin. Further, deposition of these histone marks is dynamic and manifest at spermatogonia and/or pre-leptotene meiotic cells, which would facilitate the formation of DSBs at leptotene. Importantly, there was concordance in the overlap of the histone mark ChIP profiles with nucleosome occupancy maps, which were determined by real-time PCR and whole genome sequencing (WGS) analyses of micococcal-nuclease resistance regions across four mouse meiotic hotspots (HS22, HS59.4, HS59.5 and HS61.1). Our study reveals that there are instructive roles of histone acetylated marks at meiotic recombination hotspot cores and that they are necessary to promote hotspot activity and crossover resolution.
2016-11-04 | GSE87057 | GEO
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
Project description:Changes in acetylation of histone H4 are a common hallmark of cancer cells. In leukemia cells, histone H4 is characterized by loss of K16 mono-acetylation. Bromodomain proteins specifically recognize acetylated lysines and have been used as a target for anti cancer drug, JQ1 and iBET. Although acetylation and de-acetylation of histone H4 have been shown to have big impact in cancer cells, little attention has been focused on histone H4-acetylation at a genome level. To uncover potential epigenetic role of hyper-acetylated histone H4 at a genome-wide level in cancer cell, we generated a novel monoclonal antibody specifically recognizing histone H4 with at least two acetylated lysine residues (H4K5ac+K8ac). At the genome-wide level, hyper-acetylated histone H4 is associated with promoter and regulatory element (active enhancer, eRNA and super enhancer). We show that diacetylation at K5 and K8 of histone H4 co-localizes H3K27ac and BRD2 in the majority of active enhancer and promoters. However BRD2 has a stronger association with H4K5acK8ac. Furthermore we identified two specific chromatin states, which separately contain either H3K27ac or acetylated histone H4. Although JQ1 led to global reduction of BRD2 binding on the chromatin, only local changes of histone H4 multi-acetylation were observed upon BET inhibition by JQ1
2018-06-04 | GSE113714 | GEO
Project description:NUT, nuclear protein in testis is the universal fusion partner of BRD4 in the highly aggressive NUT Midline Carcinoma (NMC), but its physiological function was unknown. Here we show that Nut is exclusively expressed in post-meiotic spermatogenic cells, at the time of genome-wide histone hyperacetylation. Inactivation of Nut induces a spermatogenesis arrest at the histone-to-protamine replacement stage, leading to male infertility. Subsequent molecular investigations show that Nut sustains global histone H4 hyperacetylation in post-meiotic cells. Additionally, Nut mediates a p300/CBP-dependent gene expression program and, by enhancing acetylation of H4 at both K5 and K8 sites, provides binding sites for the first bromodomain of Brdt, which drives histone removal. Nut’s major function is therefore to use the ubiquitous HATs p300/CBP to direct a cell-type specific histone hyperacetylation. Its ectopic activity in NMC recreates a forced p300-induced histone hyperacetylation / bromodomain binding loop that normally operates in post-meiotic spermatogenic cells.
2018-10-02 | PXD008727 | Pride