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Establishment of Developmental Gene Silencing by Ordered Polycomb Complex Recruitment in Early Zebrafish Embryos

ABSTRACT: Establishment of Developmental Gene Silencing by Ordered Polycomb Complex Recruitment in Early Zebrafish Embryos

PROVIDER: PRJNA707023 | ENA |

REPOSITORIES: ENA

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Establishment of Developmental Gene Silencing by Ordered Polycomb Complex Recruitment in Early Zebrafish Embryos [RNA-seq]

Project description:Establishment of Developmental Gene Silencing by Ordered Polycomb Complex Recruitment in Early Zebrafish Embryos [RNA-seq]

| PRJNA707026 | ENA

Establishment of Developmental Gene Silencing by Ordered Polycomb Complex Recruitment in Early Zebrafish Embryos [ChIP-seq]

Project description:Establishment of Developmental Gene Silencing by Ordered Polycomb Complex Recruitment in Early Zebrafish Embryos [ChIP-seq]

| PRJNA707028 | ENA

Establishment of Developmental Gene Silencing by Ordered Polycomb Complex Recruitment in Early Zebrafish Embryos [ATAC-seq]

Project description:Establishment of Developmental Gene Silencing by Ordered Polycomb Complex Recruitment in Early Zebrafish Embryos [ATAC-seq]

| PRJNA707027 | ENA

Establishment of Developmental Gene Silencing by Ordered Polycomb Complex Recruitment in Early Zebrafish Embryos [ATAC-seq]

Project description:Vertebrate embryos achieve developmental competency during zygotic genome activation (ZGA) by establishing chromatin states that silence yet poise developmental genes for subsequent lineage-specific activation. Here, we reveal how developmental gene poising is established de novo in preZGA zebrafish embryos. Poising is established at promoters and enhancers that initially contain open/permissive chromatin with ‘Placeholder’ nucleosomes (bearing H2A.Z, H3K4me1, and H3K27ac), and DNA hypomethylation. Silencing is initiated by the recruitment of Polycomb Repressive Complex 1 (PRC1), and H2Aub1 deposition by catalytic Rnf2 during preZGA and ZGA stages. During postZGA, H2Aub1 enables Aebp2-containing PRC2 recruitment and H3K27me3 deposition. Notably, preventing H2Aub1 (via Rnf2 inhibition) eliminates recruitment of Aebp2-PRC2 and H3K27me3, and elicits transcriptional upregulation of certain developmental genes during ZGA. However, upregulation is independent of H3K27me3 – establishing H2Aub1 as the critical silencing modification at ZGA. Taken together, we reveal the logic and mechanism for establishing poised/silent developmental genes in early vertebrate embryos.

2022-01-04 | GSE168361 | GEO

Establishment of Developmental Gene Silencing by Ordered Polycomb Complex Recruitment in Early Zebrafish Embryos [ChIP-seq]

2022-01-04 | GSE168360 | GEO

Establishment of Developmental Gene Silencing by Ordered Polycomb Complex Recruitment in Early Zebrafish Embryos [RNA-seq]

2022-01-04 | GSE168359 | GEO

Establishment of developmental gene silencing by ordered polycomb complex recruitment in early zebrafish embryos.

Project description:Vertebrate embryos achieve developmental competency during zygotic genome activation (ZGA) by establishing chromatin states that silence yet poise developmental genes for subsequent lineage-specific activation. Here, we reveal the order of chromatin states in establishing developmental gene poising in preZGA zebrafish embryos. Poising is established at promoters and enhancers that initially contain open/permissive chromatin with 'Placeholder' nucleosomes (bearing H2A.Z, H3K4me1, and H3K27ac), and DNA hypomethylation. Silencing is initiated by the recruitment of polycomb repressive complex 1 (PRC1), and H2Aub1 deposition by catalytic Rnf2 during preZGA and ZGA stages. During postZGA, H2Aub1 enables Aebp2-containing PRC2 recruitment and H3K27me3 deposition. Notably, preventing H2Aub1 (via Rnf2 inhibition) eliminates recruitment of Aebp2-PRC2 and H3K27me3, and elicits transcriptional upregulation of certain developmental genes during ZGA. However, upregulation is independent of H3K27me3 - establishing H2Aub1 as the critical silencing modification at ZGA. Taken together, we reveal the logic and mechanism for establishing poised/silent developmental genes in early vertebrate embryos.

| S-EPMC8769650 | biostudies-literature

Establishment of Developmental Gene Silencing by Ordered Polycomb Complex Recruitment in Early Zebrafish Embryos

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

2022-01-04 | GSE168362 | GEO

The role of Xist-mediated Polycomb recruitment in the initiation of X-chromosome inactivation

Project description:The role of Xist-mediated Polycomb recruitment in the initiation of X-chromosome inactivation

2019-08-29 | PXD014287 | Pride

Establishment of constitutive heterochromatin in Drosophila early embryos involves H3K14ac-mediated recruitment of Eggless/SetDB1

Project description:The establishment of heterochromatin is a crucial process in the early embryonic development. Recent research suggests that SetDB1 is necessary for heterochromatin establishment in the early embryonic development of Drosophila. Additionally, SetDB1 has been found to bind to H3K14ac in mammalian cells. However, the role of the H3K14ac in heterochromatin establishment during embryogenesis remains unknown. Here we discovered that the active modification H3K14ac serves as an intergenerational marker from oocytes to early embryos, and it is recognized by Eggless/SetDB1 through its Tudor domains. Furthermore, we have introduced a point-mutation in the endogenous Eggless/SetDB1 locus, resulting in the loss of H3K14ac-binding. Both H3K14ac attenuation and SetDB1 mutant embryos exhibit abnormal heterochromatin formation and genomic instability. We reveal a novel model of heterochromatin establishment via H3K14ac-mediated recruitment of SetDB1.

2024-08-06 | GSE242239 | GEO

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