Homo sapiens
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA324450 | ENA |
REPOSITORIES: ENA
Similar Datasets
Project description:Histone acetylation, including acetylated H3K14 (H3K14ac), is generally linked to gene activation. Monomethylated histone H3 lysine 4 (H3K4me1), together with other gene-activating marks, denotes active genes. In contrast to usual gene-activating functions of H3K14ac and H3K4me1, we here show that the dual histone modification mark H3K4me1-H3K14ac is recognized by ZMYND8 (also called RACK7) and functions to counteract gene expression. We identified ZMYND8 as a transcriptional corepressor of the H3K4 demethylase JARID1D. ZMYND8 antagonizes the expression of metastasis-linked genes, and its knockdown increases the cellular invasiveness in vitro and in vivo. The plant homeodomain (PHD) and Bromodomain cassette in ZMYND8 mediates the combinatorial recognition of H3K4me1-H3K14ac and H3K4me0-H3K14ac by ZMYND8. These findings uncover an unexpected role for the signature H3K4me1-H3K14ac in attenuating gene expression and reveal a previously unknown metastasis-suppressive epigenetic mechanism in which ZMYND8's PHD-Bromo cassette couples H3K4me1-H3K14ac with repression of metastasis-linked genes. i) ChIP-Seq data of ZMYND8, JARID1D, H3K4me1, H3K14ac, H3K4me3, and H3K27me3 in normal DU145 cells. ii) ChIP-Seq data of H3K4me1 and H3K4me3 in shLuciferase-, shJARID1D-, or shZMYND8-treated DU145 cells. iii) RNA-Seq data in shLuciferase-, shJARID1D-, or shZMYND8-treated DU145 cells.
2016-07-28 | E-GEOD-82260 | biostudies-arrayexpress
Project description:Histone acetylation, including acetylated H3K14 (H3K14ac), is generally linked to gene activation. Monomethylated histone H3 lysine 4 (H3K4me1), together with other gene-activating marks, denotes active genes. In contrast to usual gene-activating functions of H3K14ac and H3K4me1, we here show that the dual histone modification mark H3K4me1-H3K14ac is recognized by ZMYND8 (also called RACK7) and functions to counteract gene expression. We identified ZMYND8 as a transcriptional corepressor of the H3K4 demethylase JARID1D. ZMYND8 antagonizes the expression of metastasis-linked genes, and its knockdown increases the cellular invasiveness in vitro and in vivo. The plant homeodomain (PHD) and Bromodomain cassette in ZMYND8 mediates the combinatorial recognition of H3K4me1-H3K14ac and H3K4me0-H3K14ac by ZMYND8. These findings uncover an unexpected role for the signature H3K4me1-H3K14ac in attenuating gene expression and reveal a previously unknown metastasis-suppressive epigenetic mechanism in which ZMYND8's PHD-Bromo cassette couples H3K4me1-H3K14ac with repression of metastasis-linked genes.
2016-07-28 | GSE82260 | GEO
Project description:Using the estrogen receptor alpha (ERalpha) as a model ligand inducible transcription factor, we sought to explicitly define parameters that determine transcription factor binding site selection on a genomic scale in an inducible system that minimizes confounding chromatin effects by the transcription factor itself. By examining several genetic and epigenetic parameters, we find that an energetically favorable estrogen response element (ERE) motif sequence, evidence of occupancy of a "pioneering" transcription factor FOXA1, the presence of the enhancer mark, H3K4me1, and an open chromatin configuration (FAIRE) at the pre-ligand state provide specificity for ER binding. Genome-wide ChIP-sequencing was done in MCF-7 cancer cell line for the following histone H3 modifications: monomethylation H3K4me1, trimethylation H3K4me3, H3K9me3, H3K27me3, acetylation H3K9ac, H3K14ac. In addition sequencing of RNA Pol II was done at same treatment conditions (E2 and DMSO). In addition, we assessed the chromatin configuration of ERα binding sites by deeply sequencing fragments isolated by Formaldehyde-Assisted Isolation of Regulatory Elements (FAIRE) (Giresi et al, 2007) which enriches for nucleosome free genomic DNA in the aqueous phase of a phenol extraction. The analysis histone modifications in MCF-7 cancer cells was done by ChIP-seq data obtained either with E2 stimulation or without stimulation using vehicle as a control. Using the ERα binding sites defined by ChIP-seq (separate submission), we analyzed the population characteristics of the chromatin configuration of the ERα binding sites. To this end, we performed ChIP-seq analysis for the occupancy configuration of each of the following marks before and after E2 exposure: RNA Pol II, the activation marks H3K4me1, H3K4me3, H3K9ac and H3K14ac, and the repression marks H3K9me3 and H3K27me3. We assessed the chromatin configuration of ERα binding sites by deeply sequencing fragments isolated by Formaldehyde-Assisted Isolation of Regulatory Elements (FAIRE) (Giresi et al, 2007) which enriches for nucleosome free genomic DNA in the aqueous phase of a phenol extraction. The tag count of FAIRE fragments reflects the nucleosome depletion at any given site. RNA Pol II - Cat# ab5408, Abcam; H3K9me3 - Cat# ab8898, Abcam; H3K27me3 - Cat# 07-449, Upstate Biotechnology Inc.; H3K4me1 - Cat# ab8895, Abcam; H3K4me3 - Cat# ab8580, Abcam; H3K9ac - Cat# 07-352, Upstate Biotechnology Inc.; H3K14ac - Cat# 07-353, Upstate Biotechnology Inc.
2011-01-04 | E-GEOD-23701 | biostudies-arrayexpress
Project description:Using the estrogen receptor alpha (ERalpha) as a model ligand inducible transcription factor, we sought to explicitly define parameters that determine transcription factor binding site selection on a genomic scale in an inducible system that minimizes confounding chromatin effects by the transcription factor itself. By examining several genetic and epigenetic parameters, we find that an energetically favorable estrogen response element (ERE) motif sequence, evidence of occupancy of a "pioneering" transcription factor FOXA1, the presence of the enhancer mark, H3K4me1, and an open chromatin configuration (FAIRE) at the pre-ligand state provide specificity for ER binding. Genome-wide ChIP-sequencing was done in MCF-7 cancer cell line for the following histone H3 modifications: monomethylation H3K4me1, trimethylation H3K4me3, H3K9me3, H3K27me3, acetylation H3K9ac, H3K14ac. In addition sequencing of RNA Pol II was done at same treatment conditions (E2 and DMSO). In addition, we assessed the chromatin configuration of ERα binding sites by deeply sequencing fragments isolated by Formaldehyde-Assisted Isolation of Regulatory Elements (FAIRE) (Giresi et al, 2007) which enriches for nucleosome free genomic DNA in the aqueous phase of a phenol extraction. The analysis histone modifications in MCF-7 cancer cells was done by ChIP-seq data obtained either with E2 stimulation or without stimulation using vehicle as a control. Using the ERα binding sites defined by ChIP-seq (separate submission), we analyzed the population characteristics of the chromatin configuration of the ERα binding sites. To this end, we performed ChIP-seq analysis for the occupancy configuration of each of the following marks before and after E2 exposure: RNA Pol II, the activation marks H3K4me1, H3K4me3, H3K9ac and H3K14ac, and the repression marks H3K9me3 and H3K27me3. We assessed the chromatin configuration of ERα binding sites by deeply sequencing fragments isolated by Formaldehyde-Assisted Isolation of Regulatory Elements (FAIRE) (Giresi et al, 2007) which enriches for nucleosome free genomic DNA in the aqueous phase of a phenol extraction. The tag count of FAIRE fragments reflects the nucleosome depletion at any given site. RNA Pol II - Cat# ab5408, Abcam; H3K9me3 - Cat# ab8898, Abcam; H3K27me3 - Cat# 07-449, Upstate Biotechnology Inc.; H3K4me1 - Cat# ab8895, Abcam; H3K4me3 - Cat# ab8580, Abcam; H3K9ac - Cat# 07-352, Upstate Biotechnology Inc.; H3K14ac - Cat# 07-353, Upstate Biotechnology Inc.
2011-01-25 | E-GEOD-26831 | biostudies-arrayexpress
Project description:We investigated natural inter-individual variation of the epigenome in a quantitative manner. To probe the degree of natural epigenomic diversity in S. cerevisiae, we compared three unrelated wild strains using replicated Mnase-seq and ChIP-seq profiling at mononucleosomal resolution for five histone marks (H3K4me3, H3K9ac, H3K14ac and H4K12ac and H3K4me1).
2015-07-21 | E-MTAB-3390 | biostudies-arrayexpress
Project description:The modification of histones by acetyl groups has a key role in the regulation of chromatin structure and transcription. The Arabidopsis thaliana histone acetyltransferase GCN5 regulates histone modifications as part of the Spt-Ada-Gcn5 Acetyltransferase (SAGA) transcriptional coactivator complex. GCN5 was previously shown to acetylate lysine 14 of histone 3 (H3K14ac) in the promoter regions of its target genes; however, its binding did not systematically correlate with gene activation and the mechanism by which GCN5 controls transcription thus remained unclear. To gain insight into GCN5 function, we fine-mapped its genome-wide binding sites and explored the effect of GCN5 loss-of-function on the expression of its target genes, finding that GCN5 has a dual role in the regulation of H3K14ac levels in their 5ʹ and 3ʹ ends. We found that the gcn5 mutation leads to a genome-wide reduction of H3K14ac in the 5ʹ end of some of the GCN5 targets, a phenomenon associated to their down-regulated in the gcn5 mutant. By contrast, an increase of H3K14ac in the 3ʹ end was observed in GCN5 targets that are up-regulated in the gcn5 mutant, indicating that this protein plays a dual role in the control of H3K14ac levels and in the regulation of transcription. Furthermore, changes in H3K14ac levels in the gcn5 mutant correlated with changes in H3K9ac in a genome-wide fashion at both 5ʹ and 3ʹ ends, providing evidence for a molecular link between the deposition of these two histone modifications. Finally, we show that GCN5 participates in responses to biotic stress by repressing salicylic acid (SA) accumulation and SA-mediated immunity, highlighting the role of this protein in the regulation of the crosstalk between diverse developmental and stress-responsive physiological programs.
2020-04-28 | GSE137474 | GEO
Project description:ChIP-sequencing for the H3K9me2 mark in MCF-7 cells showed that 27-HC treatment reduces the H3K9me2 mark on subset of genes linked to cancer progression, proliferation, and metastasis
2023-09-21 | GSE232895 | GEO
Project description:Emerging evidence suggested that epigenetic regulators can exhibit both co-activator and co-repressor activities in gene transcriptional regulation and disease development, such as cancer. However, how these dual activities are regulated and coordinated in cellular contexts remains elusive. Here, we reported that KDM5C, a repressive histone demethylase, is unexpectedly required for estrogen/estrogen receptor alpha (ERa)-induced gene transcriptional activation to promote cell proliferation, while it suppresses the expression of type I interferons (IFNs) and interferon-stimulated genes (ISGs) to escape from immuno-surveillance. KDM5C-interacting protein, ZMYND8, is found to be accompanied with KDM5C in regulation of both subsets of genes. Mechanistically, during estrogen/ERa-induced gene transcriptional activation, ERa interacts and recruits KDM5C/ZMYND8 to active enhancers, where ERa masks KDM5C’s demethylase activity towards H3K4me2/3, converting KDM5C from a co-repressor to a co-activator. Furthermore, KDM5C and ZMYND8 are found to recruit the P-TEFb complex in a cooperative manner to activate estrogen/ERa-target genes. In contrast, KDM5C/ZMYND8 represses type I IFNs and ISGs through directly interfering TBK1 phosphorylation in an enzymatic-dependent manner. The combinatory effects of KDM5C’s dual activities in regulation of genes involved in both cell proliferation and immuno-escape lead to breast cancer cell proliferation in vitro and xenograft growth in mice. Taken together, we revealed a mechanism by which a repressive epigenetic regulator can be converted to a co-activator under specific signal cues to regulate specific gene programs, and the dual nature as both a co-repressor and co-activator together contributes to cancer development.
2021-03-17 | GSE141986 | GEO
Project description:Emerging evidence suggested that epigenetic regulators can exhibit both co-activator and co-repressor activities in gene transcriptional regulation and disease development, such as cancer. However, how these dual activities are regulated and coordinated in cellular contexts remains elusive. Here, we reported that KDM5C, a repressive histone demethylase, is unexpectedly required for estrogen/estrogen receptor alpha (ERa)-induced gene transcriptional activation to promote cell proliferation, while it suppresses the expression of type I interferons (IFNs) and interferon-stimulated genes (ISGs) to escape from immuno-surveillance. KDM5C-interacting protein, ZMYND8, is found to be accompanied with KDM5C in regulation of both subsets of genes. Mechanistically, during estrogen/ERa-induced gene transcriptional activation, ERa interacts and recruits KDM5C/ZMYND8 to active enhancers, where ERa masks KDM5C’s demethylase activity towards H3K4me2/3, converting KDM5C from a co-repressor to a co-activator. Furthermore, KDM5C and ZMYND8 are found to recruit the P-TEFb complex in a cooperative manner to activate estrogen/ERa-target genes. In contrast, KDM5C/ZMYND8 represses type I IFNs and ISGs through directly interfering TBK1 phosphorylation in an enzymatic-dependent manner. The combinatory effects of KDM5C’s dual activities in regulation of genes involved in both cell proliferation and immuno-escape lead to breast cancer cell proliferation in vitro and xenograft growth in mice. Taken together, we revealed a mechanism by which a repressive epigenetic regulator can be converted to a co-activator under specific signal cues to regulate specific gene programs, and the dual nature as both a co-repressor and co-activator together contributes to cancer development.
2021-03-17 | GSE141987 | GEO
Project description:Enhancers act to regulate cell type specific gene expression by facilitating the transcription of target genes. In mammalian cells active or primed enhancers are commonly marked by monomethylation of Histone H3 at lysine 4 (H3K4me1) in a cell-type specific manner. Whether and how this histone modification regulates enhancer-dependent transcription programs in mammals has been unclear. In the present study, we conducted SILAC Mass-spec experiments with mono-nucleosomes and identified multiple H3K4me1 associated proteins, including proteins involved in chromatin remodeling. We demonstrate that H3K4me1 augments the association of the chromatin remodeling complex BAF to enhancers in vivo. Furthermore we show that in vitro, H3K4me1 nucleosomes are more efficiently remodeled by the BAF complex. Crystal structures of a BAF component BAF45c further reveal that monomethylation, but not trimethylation, is accommodated in this protein’s H3K4 binding site. Our results suggest that H3K4me1 plays an active role at enhancers by facilitating the binding of the BAF complex and possibly other chromatin regulators.
2018-10-23 | PXD007942 | Pride