Transcription Factors Involved in DNA Demethylation During Human Cellular Development
Ontology highlight
ABSTRACT:
ORGANISM(S): Homo sapiens
PROVIDER: GSE171773 | GEO | 2022/03/30
REPOSITORIES: GEO
Similar Datasets
Project description:RUNX1 (also known as AML1) is a key transcription factor for definitive hematopoietic stem cell development and following hematopoietic cell linage specifications, in which chromatin- or epigennome-mediated regulation by RUNX1, particularly regulation of DNA methylation status, is proposed to be involved in addition to its direct gene expression regulation. However, how RUNX1 regulates DNA methylation status and its role in the hematopoiesis remain to be elucidated. Here we first demonstrated that RUNX1 induces RUNX1 binding site directed DNA demethylation across the whole genome. HaloTag-based pull-down assay revealed associations of RUNX1 with active DNA demethylation related proteins such as TET, TDG or GADD45A, suggested that the RUNX1-mediated DNA demethylation is active DNA demethylation mechanism. Additional combinatorial overexpression of TET and TDG enlarged the RUNX1-mediated DNA demethylation, supporting what RUNX1-mediated DNA demethylation is active DNA demethylation. These results strongly suggested that RUNX1-mediated DNA demethylation is achieved by recruiting those proteins involved in active DNA demethylation. Finally, we found that the RUNX1-mediated demethylation predominately targets and activates hematopoietic genes whose promoter regions are demethylated during hematopoiesis. Collectively, our insight suggested that RUNX1-mediated binding site directed DNA demethylation is a novel mechanism of hematopoietic gene activation.
2017-08-10 | GSE60316 | GEO
Project description:Background: DNA methylation is a fundamental epigenetic modification which is involved in many biological systems such as differentiation and disease. We and other groups recently discovered that a part of transcription factors (TFs) plays a role for site-specificity determination of DNA demethylation in a binding site-directed manner, although number of reports for such TFs are limited. Results: Here, we develop a screening system to identify TFs which induce the binding site-directed DNA methylation changes. The system consists of ectopic expression of target TFs in model cells and the DNA methylome analysis followed by overrepresentation analysis of the corresponding TF binding motif at differentially methylated regions. Our system successfully identifies binding site-directed demethylation of SPI1 which is known to promote DNA demethylation in a binding-site directed manner. We extend our screening system to 15 master TFs which are involved in cellular differentiations, and identified 8 (RUNX3, GATA2, CEBPB, MAFB, NR4A2, MYOD1, CEBPA and TBX5) novel binding site-directed DNA demethylation inducing TFs. Gene ontology and specifically expressing tissue enrichment analysis revealed that those 8 TFs demethylate genome regions which are associated with corresponding biological roles, supporting performance of our system. We also describe characteristics of the binding site-directed DNA demethylation induced by those TFs; targeting highly methylated CpGs, local DNA demethylation, and overlap of demethylated regions between same family TFs. Conclusion: Thus, our results emphasize usefulness of the developed screening system for identification of TFs which induce DNA demethylation in a site-directed manner.
2017-11-29 | GSE102822 | GEO
Project description:The DNA methylation program is at the bottom layer of the epigenetic regulatory cascade of vertebrate development. While the methylation at C-5 position of the cytosine (C) residues on the vertebrate genomes is achieved through the catalytic activities of the DNA methyltransferases (DNMTs), the conversion of the methylated cytosine (5mC) could be accomplished by the combined actions of the TET enzyme and DNA repair. Interestingly, it has been found recently that the mouse and human DNMTs also possess active DNA demethylation activity in vitro in a Ca2+- and redox condition-dependent manner. We report here the study of tracking down the fate of the methyl group removed from 5mC on DNA during in vitro demethylation reaction by mouse de novo DNMTs, i.e. DNMT3A and DNMT3B. Remarkably, the methyl group becomes covalently linked to the catalytic cysteines utilized by the two de novo DNMTs in their DNA methylation reactions. Thus, the forward and reverse reactions of DNA methylations by the DNMTs may utilize the same cysteine residue(s) as the active site despite of their distinctive pathways. Secondly, we demonstrate that active DNA demethylation of a heavily methylated GFP reporter plasmid by ectopically expressed DNMT3A or DNMT3B occurs in vivo in transfected human HEK 293 cells in culture. Furthermore, the extent of DNA demethylation by the DNMTs in this cell-based system is affected by Ca2+ homeostasis as well as by mutation of their putative active cysteines. These findings substantiate the roles of the vertebrate DNMTs as double-edged swords in DNA methylation-demethylation in vitro as well as in a cellular context.
2022-02-24 | PXD003401 | Pride
Project description:DNA methylation is a major epigenetic modification for gene silencing and is dramatically altered spatiotemporally during cellular development. However, the roles of DNA methylation dynamics and regulation in cellular development remain unclear. The present analyses of DNA methylome dynamics during hematopoietic development suggest that DNA demethylation pre-defines the gene expression potential of terminal differentiation-specific genes at the progenitor cell stage and is regulated by lineage-specific transcription factors (TFs). Demethylation of majority of hypo-methylated CpGs in terminally differentiated cells occurs during the progenitor cell stage and is associated with rapid upregulation of terminal differentiation-specific genes. Accordingly, TF overrepresentation analyses indicated that lineage-specific TFs regulate DNA demethylation. The present experiments show that RUNX1 induces site-directed active DNA demethylation by recruiting DNA demethylation enzymes. Collectively, the present data indicate an integrated system of DNA methylation and gene expression during cellular development.
2017-08-10 | GSE85523 | GEO
Project description:DNA methylation is a major epigenetic modification for gene silencing and is dramatically altered spatiotemporally during cellular development. However, the roles of DNA methylation dynamics and regulation in cellular development remain unclear. The present analyses of DNA methylome dynamics during hematopoietic development suggest that DNA demethylation pre-defines the gene expression potential of terminal differentiation-specific genes at the progenitor cell stage and is regulated by lineage-specific transcription factors (TFs). Demethylation of majority of hypo-methylated CpGs in terminally differentiated cells occurs during the progenitor cell stage and is associated with rapid upregulation of terminal differentiation-specific genes. Accordingly, TF overrepresentation analyses indicated that lineage-specific TFs regulate DNA demethylation. The present experiments show that RUNX1 induces site-directed active DNA demethylation by recruiting DNA demethylation enzymes. Collectively, the present data indicate an integrated system of DNA methylation and gene expression during cellular development.
2017-08-10 | GSE85524 | GEO
Project description:The vertebrate body plan and organs are shaped during a highly conserved embryonic phase called the phylotypic stage, however the mechanisms that guide the epigenome through this transition and their evolutionary conservation remain elusive. Here we report widespread DNA demethylation of thousands of enhancers during the phylotypic period in zebrafish, Xenopus and mouse. These dynamic enhancers are linked to essential developmental genes that display coordinated transcriptional and epigenomic changes in the diverse vertebrates during embryogenesis. Phylotypic stage-specific binding of Tet proteins to (hydroxy)methylated DNA, and enrichment of hydroxymethylcytosine on these enhancers, implicated active DNA demethylation in this process. Furthermore, loss of function of Tet1/2/3 in zebrafish caused reduced chromatin accessibility and increased methylation levels specifically on these enhancers, indicative of DNA methylation being an upstream regulator of phylotypic enhancer function. Overall, our study reveals a novel regulatory module associated with the most conserved phase of vertebrate embryogenesis and uncovers an ancient developmental role for the Tet dioxygenases.
2016-01-27 | PXD001164 | Pride
Project description:We report that the winged helix transcription factor FOXA1 is unexpectedly associated with components of single and double stranded-DNA repair complexes. Biochemical studies and high-throughput approaches validated the hierarchical composition of this FOXA1-nucleated machinery and revealed the dependency on FOXA1 for global targeting of the key repair polymerase POLB. Genome-wide DNA methylomes at single-base resolution demonstrated that FOXA1-DNA repair complex is functionally linked to DNA demethylation in a lineage specific fashion. Loss-of-function studies indicate that a significant portion of FOXA1-bound regions display localized reestablishment of methylation and that the subsets with most consistent hypermethylation are represented by active promoters and enhancers that also exhibit the greatest depletion of POLB following FOXA1 removal. Consistently, forced expression of FOXA1 commits its binding sites to an active DNA demethylation in a POLB dependent manner. Finally, we showed that FOXA1-associated DNA demethylation is tightly coupled with genomic targeting of estrogen receptor and estrogen responsiveness. Together, our results link FOXA1-associated DNA demethylation to its transcriptional pioneering.
2016-06-08 | PXD004271 | Pride
Project description:Cytosine DNA methylation is considered to be a stable epigenetic mark, but active demethylation has been observed in both plants and animals. In Arabidopsis thaliana, DNA glycosylases of the DEMETER (DME) family remove methylcytosines from DNA. Demethylation by DME is necessary for genomic imprinting and demethylation by a related protein, REPRESSOR OF SILENCING1, which prevents gene silencing in a transgenic background. However, the extent and function of demethylation by DEMETER-LIKE (DML) proteins in WT plants is not known. Using genome-tiling microarrays, we mapped DNA methylation in mutant and WT plants and identified 179 loci actively demethylated by DML enzymes. Mutations in DML genes lead to locus-specific DNA hypermethylation. Reintroducing WT DML genes restores most loci to the normal pattern of methylation, although at some loci, hypermethylated epialleles persist. Of loci demethylated by DML enzymes, >80% are near or overlap genes. Genic demethylation by DML enzymes primarily occurs at the 5' and 3' ends, a pattern opposite to the overall distribution of WT DNA methylation. Our results show that demethylation by DML DNA glycosylases edits the patterns of DNA methylation within the Arabidopsis genome to protect genes from potentially deleterious methylation. Keywords: whole genome profiling, DNA methylation, demethylase
2007-04-02 | GSE7336 | GEO
Project description:Dynamic DNA methylation and demethylation regulate gene expression during development. While DNA methyltransferases (DNMTs) establish and maintain cytosine methylation patterns, Ten-eleven translocation (Tet) dioxygenases catalyze sequential oxidation of 5-methylcytosine (5mC) to promote demethylation. Target-specific 5mC oxidation requires precise regulation of the Tet enzymatic activity. However, the mechanism underlying their activity control remains largely unexplored. Here we show a large low-complexity domain (LCD), present within the catalytic domain of Tet3, functions to repress the dioxygenase activity. Recombinant LCD-deleted Tet3 exhibits enhanced activity to convert 5mC into oxidized species. Deletion of the Tet3 LCD in mouse oocytes renders 5mC oxidation indiscriminately across the genome, leading to most prominently the derepression of ERVK retrotransposons and upregulation of adjacent genes. The extensive 5mC oxidation is associated with impairments in oocyte development. These findings suggest an intrinsic auto-regulatory mechanism of Tet3 dioxygenase operating to ensure a tight regulation of its enzymatic activity to achieve spatiotemporal specificity of methylome reprogramming during oocyte development.
2023-06-26 | GSE222618 | GEO
Project description:The epigenomes of mammalian sperm and oocytes, characterized by gamete-specific 5-methylcytosine (5mC) patterns, are reprogrammed in early embryogenesis to establish full developmental potential. It is broadly accepted that the paternal genome is actively demethylated in the zygote while the maternal genome undergoes passive demethylation thanks to DNA replication over the subsequent cleavage divisions. Here we reveal that both maternal and paternal genomes undergo widespread active and passive demethylation in the pronuclear zygote before the first mitotic division. Whereas the passive demethylation requires DNA replication, the active demethylation relies on enzymatic oxidation of 5mC, as deletion of the DNA dioxygenase, Tet3, but not the inhibition of replication, blocks the active demethylation. At actively demethylated loci, 5mCs appear to be processed to unmodified cytosines in a manner independent of the DNA glycosylase TDG. These observations suggest the occurrence of genuine active demethylation in both parental genomes following fertilization. An extra supportive Tet3 knock-out female pronuclear sample related to experiment Series GSE56650.
2016-09-01 | E-GEOD-60777 | biostudies-arrayexpress