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HIRA and dPCIF1 coordinately establish totipotent chromatin and control orderly ZGA in Drosophila embryos [ATAC-seq]

ABSTRACT: HIRA and dPCIF1 coordinately establish totipotent chromatin and control orderly ZGA in Drosophila embryos [ATAC-seq]

PROVIDER: PRJNA1066802 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR27663373_1.fastq.gz	Fastqsanger.gz
	SRR27663373_2.fastq.gz	Fastqsanger.gz
	SRR27663374_1.fastq.gz	Fastqsanger.gz
	SRR27663374_2.fastq.gz	Fastqsanger.gz
	SRR27663375_1.fastq.gz	Fastqsanger.gz

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HIRA and dPCIF1 coordinately establish totipotent chromatin and control orderly ZGA in Drosophila embryos

Project description:Early embryos undergo profound changes in their genomic architecture to establish the totipotent state, enabling pioneer factors to access chromatin and drive zygotic genome activation (ZGA). However, the mechanisms by which the totipotent state is established and properly interpreted by pioneer factors to allow orderly ZGA remain unknown. Here, we identify the H3.3-specific chaperone HIRA as a factor involving establishing totipotent-state chromatin in Drosophila early embryos. Through cophase separation with HIRA, the pioneer factor GAGA factor (GAF) efficiently binds to H3.3-marked nucleosomes to activate major-wave zygotic genes. Importantly, dPCIF1, a chromatin-associated protein, antagonized the GAF-HIRA interaction by competitively binding to HIRA, thereby restricting GAF on earlier chromatin and avoiding premature ZGA. Hence, the coordinated action of HIRA and dPCIF1 ensures sequential ZGA from the minor to major wave in early embryos. This study provides insights into understanding how a totipotent state is established and properly controlled during ZGA.

2024-11-14 | GSE253765 | GEO

HIRA and dPCIF1 coordinately establish totipotent chromatin and control orderly ZGA in Drosophila embryos [ChIP-Seq]

Project description:Early embryos undergo profound changes in their genomic architecture to establish the totipotent state, enabling pioneer factors to access chromatin and drive zygotic genome activation (ZGA). However, the mechanisms by which the totipotent state is established and properly interpreted by pioneer factors to allow orderly ZGA remain unknown. Here, we identify the H3.3-specific chaperone HIRA as a critical factor involving establishing totipotent-state chromatin in Drosophila early embryos. Through co-phase separation with HIRA, the pioneer factor GAGA factor (GAF) efficiently binds to H3.3-marked nucleosomes to activate major-wave zygotic genes. Importantly, dPCIF1, a chromatin-associated protein, antagonized the GAF–HIRA interaction by competitively binding to HIRA, thereby restricting GAF on earlier chromatin and avoiding premature ZGA. Hence, the coordinated action of HIRA and dPCIF1 ensures sequential ZGA from the minor to major wave in early embryos. This study provides insights into understanding how a totipotent state is established and properly controlled during ZGA.

2024-11-15 | GSE253709 | GEO

HIRA and dPCIF1 coordinately establish totipotent chromatin and control orderly ZGA in Drosophila embryos [RNA-Seq]

Project description:Early embryos undergo profound changes in their genomic architecture to establish the totipotent state, enabling pioneer factors to access chromatin and drive zygotic genome activation (ZGA). However, the mechanisms by which the totipotent state is established and properly interpreted by pioneer factors to allow orderly ZGA remain unknown. Here, we identify the H3.3-specific chaperone HIRA as a critical factor involving establishing totipotent-state chromatin in Drosophila early embryos. Through co-phase separation with HIRA, the pioneer factor GAGA factor (GAF) efficiently binds to H3.3-marked nucleosomes to activate major-wave zygotic genes. Importantly, dPCIF1, a chromatin-associated protein, antagonized the GAF–HIRA interaction by competitively binding to HIRA, thereby restricting GAF on earlier chromatin and avoiding premature ZGA. Hence, the coordinated action of HIRA and dPCIF1 ensures sequential ZGA from the minor to major wave in early embryos. This study provides insights into understanding how a totipotent state is established and properly controlled during ZGA.

2024-11-15 | GSE253714 | GEO

HIRA and dPCIF1 coordinately establish totipotent chromatin and control orderly ZGA in Drosophila embryos [ATAC-seq]

Project description:Early embryos undergo profound changes in their genomic architecture to establish the totipotent state, enabling pioneer factors to access chromatin and drive zygotic genome activation (ZGA). However, the mechanisms by which the totipotent state is established and properly interpreted by pioneer factors to allow orderly ZGA remain unknown. Here, we identify the H3.3-specific chaperone HIRA as a critical factor involving establishing totipotent-state chromatin in Drosophila early embryos. Through co-phase separation with HIRA, the pioneer factor GAGA factor (GAF) efficiently binds to H3.3-marked nucleosomes to activate major-wave zygotic genes. Importantly, dPCIF1, a chromatin-associated protein, antagonized the GAF–HIRA interaction by competitively binding to HIRA, thereby restricting GAF on earlier chromatin and avoiding premature ZGA. Hence, the coordinated action of HIRA and dPCIF1 ensures sequential ZGA from the minor to major wave in early embryos. This study provides insights into understanding how a totipotent state is established and properly controlled during ZGA.

2024-11-15 | GSE253704 | GEO

HIRA and dPCIF1 coordinately establish totipotent chromatin and control orderly ZGA in Drosophila embryos (response) [RNA-seq]

Project description:Early embryos undergo profound changes in their genomic architecture to establish the totipotent state, enabling pioneer factors to access chromatin and drive zygotic genome activation (ZGA). However, the mechanisms by which the totipotent state is established and properly interpreted by pioneer factors to allow orderly ZGA remain unknown. Here, we identify the H3.3-specific chaperone HIRA as a critical factor involving establishing totipotent-state chromatin in Drosophila early embryos. Through co-phase separation with HIRA, the pioneer factor GAGA factor (GAF) efficiently binds to H3.3-marked nucleosomes to activate major-wave zygotic genes. Importantly, dPCIF1, a chromatin-associated protein, antagonized the GAF–HIRA interaction by competitively binding to HIRA, thereby restricting GAF on earlier chromatin and avoiding premature ZGA. Hence, the coordinated action of HIRA and dPCIF1 ensures sequential ZGA from the minor to major wave in early embryos. This study provides insights into understanding how a totipotent state is established and properly controlled during ZGA.

2024-11-15 | GSE275419 | GEO

HIRA and dPCIF1 coordinately establish totipotent chromatin and control orderly ZGA in Drosophila embryos

Project description:HIRA and dPCIF1 coordinately establish totipotent chromatin and control orderly ZGA in Drosophila embryos

| PRJNA1066900 | ENA

HIRA and dPCIF1 coordinately establish totipotent chromatin and control orderly ZGA in Drosophila embryos [ChIP-Seq]

Project description:HIRA and dPCIF1 coordinately establish totipotent chromatin and control orderly ZGA in Drosophila embryos [ChIP-Seq]

| PRJNA1066806 | ENA

HIRA and dPCIF1 coordinately establish totipotent chromatin and control orderly ZGA in Drosophila embryos [RNA-Seq]

Project description:HIRA and dPCIF1 coordinately establish totipotent chromatin and control orderly ZGA in Drosophila embryos [RNA-Seq]

| PRJNA1066810 | ENA

HIRA and dPCIF1 coordinately establish totipotent chromatin and control orderly ZGA in Drosophila embryos (response) [RNA-seq]

Project description:HIRA and dPCIF1 coordinately establish totipotent chromatin and control orderly ZGA in Drosophila embryos (response) [RNA-seq]

| PRJNA1150635 | ENA

Analysis of genome architecture during SCNT reveals a role of cohesin in impeding minor ZGA

Project description:Somatic cell nuclear transfer (SCNT) can reprogram a somatic nucleus to a totipotent state. However, the re-organization of three-dimensional chromatin structure in this process remains poorly understood. Using low-input Hi-C, we revealed that during SCNT, the transferred nucleus first enters a mitotic-like state (premature chromatin condensation). Unlike fertilized embryos, SCNT embryos show stronger TADs at the 1-cell stage. TADs become weaker at the 2-cell stage, followed by gradual consolidation. Compartments A/B are markedly weak in 1-cell SCNT embryos and become increasingly strengthened afterward. By the 8-cell stage, somatic chromatin architecture is largely reset to embryonic patterns. Unexpectedly, we found cohesin represses minor zygotic genome activation (ZGA) genes (2-cell specific genes) in pluripotent and differentiated cells, and pre-depleting cohesin in donor cells facilitates minor ZGA and SCNT. These data reveal multi-step reprogramming of 3D chromatin architecture during SCNT and support dual roles of cohesin in TAD formation and minor ZGA repression.

2020-06-23 | GSE139430 | GEO

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