Promoter DNA methylation couples genome-defense mechanisms to epigenetic reprogramming in the mouse germline
Ontology highlight
ABSTRACT:
ORGANISM(S): Mus musculus
SUBMITTER: Jamie Hackett
PROVIDER: E-GEOD-38307 | biostudies-arrayexpress |
REPOSITORIES: biostudies-arrayexpress
Similar Datasets
Project description:Mouse primordial germ cells (PGCs) erase global DNA methylation (5mC) as part of the comprehensive epigenetic reprogramming that occurs during PGC development. 5mC plays an important role in maintaining stable gene silencing and repression of transposable elements (TE) but it is not clear how the extensive loss of DNA methylation impacts on gene expression and TE repression in developing PGCs. Using a novel epigenetic disruption and recovery screen and genetic analyses, we identified a core set of germline-specific genes that are dependent exclusively on promoter DNA methylation for initiation and maintenance of developmental silencing. These gene promoters appear to possess a specialised chromatin environment that does not acquire any of the repressive H3K27me3, H3K9me2, H3K9me3 or H4K20me3 histone modifications when silenced by DNA methylation. Intriguingly, this methylation-dependent subset is highly enriched in genes with roles in suppressing TE activity in germ cells. We show that the mechanism for developmental regulation of the germline genome-defence genes involves DNMT3B-dependent de novo DNA methylation. These genes are then activated by lineage-specific promoter demethylation during distinct global epigenetic reprogramming events in migratory (~E8.5) and post-migratory (E10.5-E11.5) PGCs. We propose that genes involved in genome defence are developmentally regulated exclusively by promoter DNA methylation as a sensory mechanism that is coupled to the potential for TE activation during global 5mC erasure, thereby acting as a failsafe to ensure TE suppression and maintain genomic integrity in the germline. Total RNA isolated from duplicate independent experiments of NIH/3T3 cells, NIH/3T3 cells exposed to 1uM 5aza-dC, and NIH/3T3 after 14 days recovery after drug withdrawal
2012-07-31 | E-GEOD-38305 | biostudies-arrayexpress
Project description:Mouse primordial germ cells (PGCs) erase global DNA methylation (5mC) as part of the comprehensive epigenetic reprogramming that occurs during PGC development. 5mC plays an important role in maintaining stable gene silencing and repression of transposable elements (TE) but it is not clear how the extensive loss of DNA methylation impacts on gene expression and TE repression in developing PGCs. Using a novel epigenetic disruption and recovery screen and genetic analyses, we identified a core set of germline-specific genes that are dependent exclusively on promoter DNA methylation for initiation and maintenance of developmental silencing. These gene promoters appear to possess a specialised chromatin environment that does not acquire any of the repressive H3K27me3, H3K9me2, H3K9me3 or H4K20me3 histone modifications when silenced by DNA methylation. Intriguingly, this methylation-dependent subset is highly enriched in genes with roles in suppressing TE activity in germ cells. We show that the mechanism for developmental regulation of the germline genome-defence genes involves DNMT3B-dependent de novo DNA methylation. These genes are then activated by lineage-specific promoter demethylation during distinct global epigenetic reprogramming events in migratory (~E8.5) and post-migratory (E10.5-E11.5) PGCs. We propose that genes involved in genome defence are developmentally regulated exclusively by promoter DNA methylation as a sensory mechanism that is coupled to the potential for TE activation during global 5mC erasure, thereby acting as a failsafe to ensure TE suppression and maintain genomic integrity in the germline. Total RNA isolated from control p53-/- or sample Dnmt1-/- (p53-/-) mouse embryonic fibroblasts
2012-07-31 | E-GEOD-38306 | biostudies-arrayexpress
Project description:Promoter DNA methylation couples genome-defense mechanisms to epigenetic reprogramming in the mouse germline (part 2)
| PRJNA167640 | ENA
Project description:Promoter DNA methylation couples genome-defense mechanisms to epigenetic reprogramming in the mouse germline (part 1)
| PRJNA167643 | ENA
Project description:Mouse primordial germ cells (PGCs) erase global DNA methylation (5mC) as part of the comprehensive epigenetic reprogramming that occurs during PGC development. 5mC plays an important role in maintaining stable gene silencing and repression of transposable elements (TE) but it is not clear how the extensive loss of DNA methylation impacts on gene expression and TE repression in developing PGCs. Using a novel epigenetic disruption and recovery screen and genetic analyses, we identified a core set of germline-specific genes that are dependent exclusively on promoter DNA methylation for initiation and maintenance of developmental silencing. These gene promoters appear to possess a specialised chromatin environment that does not acquire any of the repressive H3K27me3, H3K9me2, H3K9me3 or H4K20me3 histone modifications when silenced by DNA methylation. Intriguingly, this methylation-dependent subset is highly enriched in genes with roles in suppressing TE activity in germ cells. We show that the mechanism for developmental regulation of the germline genome-defence genes involves DNMT3B-dependent de novo DNA methylation. These genes are then activated by lineage-specific promoter demethylation during distinct global epigenetic reprogramming events in migratory (~E8.5) and post-migratory (E10.5-E11.5) PGCs. We propose that genes involved in genome defence are developmentally regulated exclusively by promoter DNA methylation as a sensory mechanism that is coupled to the potential for TE activation during global 5mC erasure, thereby acting as a failsafe to ensure TE suppression and maintain genomic integrity in the germline.
2012-08-01 | GSE38306 | GEO
Project description:Mouse primordial germ cells (PGCs) erase global DNA methylation (5mC) as part of the comprehensive epigenetic reprogramming that occurs during PGC development. 5mC plays an important role in maintaining stable gene silencing and repression of transposable elements (TE) but it is not clear how the extensive loss of DNA methylation impacts on gene expression and TE repression in developing PGCs. Using a novel epigenetic disruption and recovery screen and genetic analyses, we identified a core set of germline-specific genes that are dependent exclusively on promoter DNA methylation for initiation and maintenance of developmental silencing. These gene promoters appear to possess a specialised chromatin environment that does not acquire any of the repressive H3K27me3, H3K9me2, H3K9me3 or H4K20me3 histone modifications when silenced by DNA methylation. Intriguingly, this methylation-dependent subset is highly enriched in genes with roles in suppressing TE activity in germ cells. We show that the mechanism for developmental regulation of the germline genome-defence genes involves DNMT3B-dependent de novo DNA methylation. These genes are then activated by lineage-specific promoter demethylation during distinct global epigenetic reprogramming events in migratory (~E8.5) and post-migratory (E10.5-E11.5) PGCs. We propose that genes involved in genome defence are developmentally regulated exclusively by promoter DNA methylation as a sensory mechanism that is coupled to the potential for TE activation during global 5mC erasure, thereby acting as a failsafe to ensure TE suppression and maintain genomic integrity in the germline.
2012-08-01 | GSE38305 | GEO
Project description:In mammals, many germline genes are repressed by epigenetic mechanisms to prevent their illegitimate expression in embryonic and somatic cells. To advance our understanding of the complete mechanisms restricting the expression of germline genes in mammals, we analyzed the chromatin signature of germline genes and performed a genome-wide CRISPR-Cas9 knock-out screen for genes involved in germline gene repression using a reporter system in which GFP is under the control of the epigenetically repressed Dazl germline promoter in mouse embryonic stem cells (ESCs). We showed that the repression of germline genes mainly depends on the polycomb complex PRC1.6 and DNA methylation, which function additively in mouse ESCs. Furthermore, we identified and validated several novel genes involved in the repression of germline genes, and characterized three of them: Usp7, Shfm1 (also known as Sem1) and Erh. Inactivation of Usp7, Shfm1 or Erh led to the upregulation of germline genes, as well as retrotransposons for Shfm1, in mouse ESCs. Functionally, Usp7 acts at two levels: firstly it associates with PRC1.6 components and represses germline genes independently of DNA methylation, and secondly it facilitates DNA methylation deposition at germline genes for long term repression. In summary, our study provides a global view of the epigenetic mechanisms and novel factors required for silencing germline genes in embryonic cells.
2023-02-03 | PXD030666 | Pride
Project description:Epigenetic inheritance is more widespread in plants than in mammals, in part because mammals erase epigenetic information each generation by germline reprogramming. To assess the extent of germline reprogramming in plants, we sequenced the methylome of three haploid cell types from developing pollen: the sperm cell (SC), the vegetative cell, and their precursor the post-meiotic microspore. Whole genome bisulfite sequencing of FACS-purified sperm cells, vegetative nuclei and microspores
2012-08-31 | E-GEOD-40501 | biostudies-arrayexpress
Project description:The Illumina Infinium MethylationEPIC Beadchip was used to obtain genomewide methylation profiles of 16 human couples (32 individuals), selected by their facial resemblance.
2022-08-23 | GSE142302 | GEO