Epigenome analysis of HDAC1 stably knocked down HCT116 cell [Illumina EPIC]
Ontology highlight
ABSTRACT:
ORGANISM(S): Homo sapiens
PROVIDER: GSE151861 | GEO | 2020/06/06
REPOSITORIES: GEO
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Project description:UHRF1 is a key regulator of DNA methylation maintenance. In this study, we investigated whether acetylation of UHRF1 affects its hemimethylated DNA binding affinity and alters genome-wide DNA methylation pattern. We show that cells with mutation in K490 of UHRF1 have distinct methylation profile versus wildtype UHRF1 expressing cells.
2020-06-06 | GSE151862 | GEO
Project description:The multi-domain protein UHRF1 (ubiquitin-like, containing PHD and RING finger domains, 1) recruits DNMT1 for DNA methylation maintenance during DNA replication. Here, we show that MOF (Males absent On the First) is an acetyltransferase of UHRF1 to acetylate UHRF1 at Lys670 in the pre-RING linker region whereas HDAC1 is a deacetylase of UHRF1 at the same site. The MOF/HDAC1-mediated acetylation in UHRF1 is cell-cycle regulated and peaks at G1/S phase, in line with the function of UHRF1 in recruiting DNMT1 to maintain DNA methylation. In addition, UHRF1 acetylation significantly enhances its E3 ligase activity and elimination of UHRF1 acetylation at these sites attenuates UHRF1-mediated H3 ubiquitination, which in turn impairs the DNMT1 recruitment and DNA methylation. Taken together, these findings not only identify MOF as a new acetyltransferase for UHRF1 but also reveal a novel mechanism underlying the regulation of DNA methylation maintenance through MOF-mediated UHRF1 acetylation.
2024-03-06 | PXD040426 | Pride
Project description:The multi-domain protein UHRF1 (ubiquitin-like, containing PHD and RING finger domains, 1) recruits DNMT1 for DNA methylation maintenance during DNA replication. Here, we show that MOF (Males absent On the First) is an acetyltransferase of UHRF1 to acetylate UHRF1 at Lys670 in the pre-RING linker region whereas HDAC1 is a deacetylase of UHRF1 at the same site. The MOF/HDAC1-mediated acetylation in UHRF1 is cell-cycle regulated and peaks at G1/S phase, in line with the function of UHRF1 in recruiting DNMT1 to maintain DNA methylation. In addition, UHRF1 acetylation significantly enhances its E3 ligase activity and elimination of UHRF1 acetylation at these sites attenuates UHRF1-mediated H3 ubiquitination, which in turn impairs the DNMT1 recruitment and DNA methylation. Taken together, these findings not only identify MOF as a new acetyltransferase for UHRF1 but also reveal a novel mechanism underlying the regulation of DNA methylation maintenance through MOF-mediated UHRF1 acetylation.
2024-03-05 | GSE225947 | GEO
Project description:Dramatic changes in chromatin structure and histone modification occur during oocyte growth, as well as a global cessation of transcription. The role of histone modifications in these processes is poorly understood. We report the effect of conditionally deleting Hdac1 and Hdac2 on oocyte development. Deleting either gene has little or no effect on oocyte development, whereas deleting both genes results in follicle development arrest at the secondary follicle stage. This developmental arrest is accompanied by substantial perturbation of the transcriptome and a global reduction in transcription even though histone acetylation is markedly increased. There is no apparent change in histone repressive marks but there is a pronounced decrease in histone H3K4 methylation, an activating mark. The decrease in H3K4 methylation is likely due to increased expression of Kdm5b because RNAi-mediated targeting of Kdm5b in double mutant oocytes results in an increase in H3K4 methylation. An increase in TRP53 acetylation also occurs in mutant oocytes and may contribute to the observed increased incidence of apoptosis. Taken together, these results suggest seminal roles of acetylation of histone and non-histone proteins in oocyte development. We used microarrays to detail the global programme of gene expression underlying oocyte development and identified distinct classes of regulated genes during this process. Total RNA was extracted from 80 oocytes isolated from mice 12 days-of-age using the PicoPure RNA kit (Arcturus), amplified with the Ovation Pico WTA system (NuGen), and then fragmented and labeled with the FL-OvationTM cDNA Biotin Module V2 (NuGen). Four independent biological replicates were hybridized to Affymetrix GeneChip Mouse 1.1 ST microarrays (http://www.affymetrix.com/). Raw microarray data were analyzed as previously described using MAS5, GeneSpring v7, SAM and EASE software (56). A 1.4-fold cutoff was used for EASE analysis; four biological replicates provide sufficient statistical power and confidence to detect a 1.4-fold change in transcript abundance
2011-12-31 | E-GEOD-34786 | biostudies-arrayexpress
Project description:Dramatic changes in chromatin structure and histone modification occur during oocyte growth, as well as a global cessation of transcription. The role of histone modifications in these processes is poorly understood. We report the effect of conditionally deleting Hdac1 and Hdac2 on oocyte development. Deleting either gene has little or no effect on oocyte development, whereas deleting both genes results in follicle development arrest at the secondary follicle stage. This developmental arrest is accompanied by substantial perturbation of the transcriptome and a global reduction in transcription even though histone acetylation is markedly increased. There is no apparent change in histone repressive marks but there is a pronounced decrease in histone H3K4 methylation, an activating mark. The decrease in H3K4 methylation is likely due to increased expression of Kdm5b because RNAi-mediated targeting of Kdm5b in double mutant oocytes results in an increase in H3K4 methylation. An increase in TRP53 acetylation also occurs in mutant oocytes and may contribute to the observed increased incidence of apoptosis. Taken together, these results suggest seminal roles of acetylation of histone and non-histone proteins in oocyte development. We used microarrays to detail the global programme of gene expression underlying oocyte development and identified distinct classes of regulated genes during this process.
2011-12-31 | GSE34786 | GEO
Project description:UHRF1 (Ubiquitin-like, containing PHD and RING finger domains, 1) recruits DNMT1 to hemimethylated DNA during replication, is essential for maintaining DNA methylation patterns during cell division and is suggested to direct additional repressive epigenetic marks. Uhrf1 mutation in zebrafish results in multiple embryonic defects including failed hepatic outgrowth, but the epigenetic basis of these phenotypes is not known. We find that DNA methylation is the only epigenetic mark that is depleted in uhrf1 mutants and make the surprising finding that despite the reduced organ size in uhrf1 mutants, genes regulating DNA replication and S-phase progression were highly upregulated. Further, there is a striking increase in BrdU incorporation in uhrf1 mutant cells, and they retained BrdU labeling over several days, indicating they are arrested in S-phase. Moreover, some of the label retaining nuclei co-localized with TUNEL positive nuclei, suggesting that arrested cells are responsible for apoptosis. Importantly, dnmt1 mutation phenocopies the S-phase arrest and hepatic outgrowth defects in uhrf1 mutants and Dnmt1 knock-down enhances the uhrf1 hepatic phenotype. Together, these data indicate that DNA hypomethylation is sufficient to generate the uhrf1 mutant phenotype by promoting an S-phase arrest. We thus propose that cell cycle arrest is a mechanism to restrict propagation of epigenetically deranged cells during embryogenesis. Genome-wide expression profiling was performed on 2 uhrf1 mutant and 2 wildtype zebrafish larvae (120 hours post fertilization) by using Zebrafish Genome Array (Affymetrix) according to manufacturer's instruction.
2015-02-09 | E-GEOD-55339 | biostudies-arrayexpress
Project description:UHRF1 is essential for targeting DNA methyltransferases (DNMT’s) to replicating DNA to establish de novo DNA methylation and maintain it. While, UHRF1 domains are defined, including requirement for an E3 ligase region, for de novo methylation, those essential for maintenance have been difficult to outline. Herein, via a new assay, chromatin histone-binding and a hemimethylated DNA reader domains, but not the ligase domain are found essential for cancer-specific DNA methylation maintenance in human colorectal cancer (CRC) cells. Disrupting each essential domain phenocopies UHRF1 depletion for global DNA demethylation, reactivation of tumor suppressor genes (TSGs), and reduction in CRC invasion and metastatic properties. Moreover, there is strong negative correlation between high UHRF1 expression, low TSG expression, and abnormal methylation with CRC progression and overall survival. Our battery of findings suggest the value of targeting specific domains of UHRF1 for cancer therapy and adding a precision medicine approach through use of the biomarker associations we define.
2019-02-28 | GSE118971 | GEO
Project description:UHRF1 is essential for targeting DNA methyltransferases (DNMT’s) to replicating DNA to establish de novo DNA methylation and maintain it. While, UHRF1 domains are defined, including requirement for an E3 ligase region, for de novo methylation, those essential for maintenance have been difficult to outline. Herein, via a new assay, chromatin histone-binding and a hemimethylated DNA reader domains, but not the ligase domain are found essential for cancer-specific DNA methylation maintenance in human colorectal cancer (CRC) cells. Disrupting each essential domain phenocopies UHRF1 depletion for global DNA demethylation, reactivation of tumor suppressor genes (TSGs), and reduction in CRC invasion and metastatic properties. Moreover, there is strong negative correlation between high UHRF1 expression, low TSG expression, and abnormal methylation with CRC progression and overall survival. Our battery of findings suggest the value of targeting specific domains of UHRF1 for cancer therapy and adding a precision medicine approach through use of the biomarker associations we define.
2019-02-28 | GSE118970 | GEO
Project description:Dynamic changes in histone acetylation patterns are mediated by the activity of histone acetyltransfereases (HATs) and histone deacetylases (HDACs) and are key events in the epigenetic regulation of gene expression. The application of HDAC inhibitors revealed a variety of T cell functions controlled by reversible lysine acetylation and HDAC1, HDAC2, HDAC3, HDAC7 and HDAC9 have been implicated in regulating T cell development and function. Nevertheless, unique functions of individual HDAC members in T cells and specific T cell functions that are regulated by HDACs are still only poorly understood. We previously showed that T cell-specific loss of HDAC1 (using the Cd4Cre deleter strain) leads to enhanced allergic airway inflammation and increased Th2 cytokine production. Interestingly, late T cell development was not impaired in these mice. However, HDAC2 was up-regulated in the absence of HDAC1, thus we hypothesized compensatory pathways/function between these two closely related class I HDAC family members in T cells. To investigate redundant and non-redundant functions of HDAC1 and HDAC2, we generated mice with a conditional T cell-specific (using Cd4Cre) combined loss of HDAC1 and HDAC2. As part of our study, we determined and compared the transcriptome of peripheral wild-type and HDAC1/2-null CD4+ T cells. Since loss of HDAC1/HDAC2 during late T cell development led to the appearance of MHC class II-selected CD4+ helper T cells that expressed CD8 lineage genes such as Cd8a and Cd8b1, we also analyzed the transcriptome of HDAC1/2-null CD4+CD8+ T cells.
2014-03-30 | E-MTAB-2184 | biostudies-arrayexpress
Project description:Epigenome analysis of HDAC1 stably knocked down HCT116 cell [Illumina EPIC]
| PRJNA637513 | ENA