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Setdb1 regulates Cohesin at H3K9me3-independent topological domains [Hi-C]

ABSTRACT: Setdb1 regulates Cohesin at H3K9me3-independent topological domains [Hi-C]

PROVIDER: PRJNA780175 | ENA |

REPOSITORIES: ENA

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Setdb1 regulates Cohesin at H3K9me3-independent topological domains

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Setdb1 regulates Cohesin at H3K9me3-independent topological domains

Project description:This SuperSeries is composed of the SubSeries listed below.

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Identification of Setdb1 interaction proteins in neural stem cells

Project description:Setdb1 is an epigenetic factors catalyzing modification of H3K9me3. Expression of its gene is localized to embryonic neural cells during vertebrate embryogenesis, suggesting its role in regulating neural stemness. The project is to identify the interaction partners of Setdb1, by which Setdb1 regulates neural stemness in neural stem cells.

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Setdb1 is required for persistence of H3K9me3 and repression of endogenous retroviruses in mouse primordial germ cells

Project description:Transcription of endogenous retroviruses (ERVs) is inhibited by de novo DNA methylation during gametogenesis, a process initiated after birth in oocytes and at ~E15.5 in prospermatogonia. Earlier in germline development however, the genome, including most retrotransposons, is progressively demethylated, with young ERVK and ERV1 elements retaining intermediate methylation levels. As DNA methylation reaches a low point in E13.5 primordial germ cells (PGCs) of both sexes, we determined whether retrotransposons are marked by H3K9me3 and H3K27me3 using a recently developed low input ChIP-seq method. Although these repressive histone modifications are predominantly found on distinct genomic regions in E13.5 PGCs, they concurrently mark partially methylated LTRs and LINE1 elements. Germline-specific conditional knock-out (KO) of the H3K9 methyltransferase SETDB1 yields a decrease of both histone marks and DNA methylation at H3K9me3 enriched retrotransposon families. Strikingly, Setdb1-KO E13.5 PGCs show concomitant de-repression of many marked ERVs, including IAP, ETn and ERVK10C elements and ERV-proximal genes, a subset in a sex-dependent manner. Furthermore, Setdb1 deficiency is associated with a reduced number of male PGCs and postnatal hypogonadism in both sexes. Taken together, these observations reveal that SETDB1 is an essential guardian against proviral expression prior to the onset of de novo DNA methylation in the germline. H3K9me3, H3K27me3 and expression profiles in Setdb1 WT, Het and KO male and female E13.5 PGCs.

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Project description:Comparison of wild type, setdb1 GLKD, and snf[148] H3K9me3 profiles shows that SXL facilitates H3K9me3 deposition on SETDB1 regulated genes

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