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GAF is essential for zygotic genome activation and chromatin accessibility in the early Drosophila embryo [ATAC-seq]

ABSTRACT: GAF is essential for zygotic genome activation and chromatin accessibility in the early Drosophila embryo [ATAC-seq]

PROVIDER: PRJNA640380 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR13498852_1.fastq.gz	Fastqsanger.gz
	SRR13498852_2.fastq.gz	Fastqsanger.gz
	SRR13498853_1.fastq.gz	Fastqsanger.gz
	SRR13498853_2.fastq.gz	Fastqsanger.gz
	SRR13498854_1.fastq.gz	Fastqsanger.gz

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Similar Datasets

GAF is essential for zygotic genome activation and chromatin accessibility in the early Drosophila embryo [RNA-seq]

Project description:Following fertilization, the genomes of the germ cells are reprogrammed to form the totipotent embryo. Pioneer transcription factors are essential for remodeling the chromatin and driving the initial wave of zygotic gene expression. In Drosophila melanogaster, the pioneer factor Zelda is essential for development through this dramatic period of reprogramming, known as the maternal- to-zygotic transition (MZT). However, it was unknown whether additional pioneer factors were required for this transition. We identified an additional maternally encoded factor required for development through the MZT, GAGA Factor (GAF). GAF is necessary to activate widespread zygotic transcription and to remodel the chromatin accessibility landscape. We demonstrated that Zelda preferentially controls expression of the earliest transcribed genes, while genes expressed during widespread activation are predominantly dependent on GAF. Thus, progression through the MZT requires coordination of multiple pioneer-like factors, and we propose that as development proceeds control is gradually transferred from Zelda to GAF.

2021-03-03 | GSE152772 | GEO

GAF is essential for zygotic genome activation and chromatin accessibility in the early Drosophila embryo [ATAC-seq]

Project description:Following fertilization, the genomes of the germ cells are reprogrammed to form the totipotent embryo. Pioneer transcription factors are essential for remodeling the chromatin and driving the initial wave of zygotic gene expression. In Drosophila melanogaster, the pioneer factor Zelda is essential for development through this dramatic period of reprogramming, known as the maternal-to-zygotic transition (MZT). However, it was unknown whether additional pioneer factors were required for this transition. We identified an additional maternally encoded factor required for development through the MZT, GAGA Factor (GAF). GAF is necessary to activate widespread zygotic transcription and to remodel the chromatin accessibility landscape. We demonstrated that Zelda preferentially controls expression of the earliest transcribed genes, while genes expressed during widespread activation are predominantly dependent on GAF. Thus, progression through the MZT requires coordination of multiple pioneer-like factors, and we propose that as development proceeds control is gradually transferred from Zelda to GAF.

2021-03-03 | GSE152771 | GEO

GAF is essential for zygotic genome activation and chromatin accessibility in the early Drosophila embryo [ChIP-seq]

Project description:Following fertilization, the genomes of the germ cells are reprogrammed to form the totipotent embryo. Pioneer transcription factors are essential for remodeling the chromatin and driving the initial wave of zygotic gene expression. In Drosophila melanogaster, the pioneer factor Zelda is essential for development through this dramatic period of reprogramming, known as the maternal-to-zygotic transition (MZT). However, it was unknown whether additional pioneer factors were required for this transition. We identified an additional maternally encoded factor required for development through the MZT, GAGA Factor (GAF). GAF is necessary to activate widespread zygotic transcription and to remodel the chromatin accessibility landscape. We demonstrated that Zelda preferentially controls expression of the earliest transcribed genes, while genes expressed during widespread activation are predominantly dependent on GAF. Thus, progression through the MZT requires coordination of multiple pioneer-like factors, and we propose that as development proceeds control is gradually transferred from Zelda to GAF.

2021-03-03 | GSE152770 | GEO

GAF is essential for zygotic genome activation and chromatin accessibility in the early Drosophila embryo

Project description:GAF is essential for zygotic genome activation and chromatin accessibility in the early Drosophila embryo

| PRJNA640375 | ENA

GAF is essential for zygotic genome activation and chromatin accessibility in the early Drosophila embryo [ChIP-seq]

Project description:GAF is essential for zygotic genome activation and chromatin accessibility in the early Drosophila embryo [ChIP-seq]

| PRJNA640381 | ENA

GAF is essential for zygotic genome activation and chromatin accessibility in the early Drosophila embryo [RNA-seq]

Project description:GAF is essential for zygotic genome activation and chromatin accessibility in the early Drosophila embryo [RNA-seq]

| PRJNA640379 | ENA

GAF is essential for zygotic genome activation and chromatin accessibility in the early Drosophila embryo.

Project description:Following fertilization, the genomes of the germ cells are reprogrammed to form the totipotent embryo. Pioneer transcription factors are essential for remodeling the chromatin and driving the initial wave of zygotic gene expression. In Drosophila melanogaster, the pioneer factor Zelda is essential for development through this dramatic period of reprogramming, known as the maternal-to-zygotic transition (MZT). However, it was unknown whether additional pioneer factors were required for this transition. We identified an additional maternally encoded factor required for development through the MZT, GAGA Factor (GAF). GAF is necessary to activate widespread zygotic transcription and to remodel the chromatin accessibility landscape. We demonstrated that Zelda preferentially controls expression of the earliest transcribed genes, while genes expressed during widespread activation are predominantly dependent on GAF. Thus, progression through the MZT requires coordination of multiple pioneer-like factors, and we propose that as development proceeds control is gradually transferred from Zelda to GAF.

| S-EPMC8079149 | biostudies-literature

GAF.2-4 hr OR embryo

Project description:modENCODE_submission_6387 This submission comes from a modENCODE project of Gary Karpen. For full list of modENCODE projects, see http://www.genome.gov/26524648 Project Goal: We aim to determine the locations of the major histone modifications across the Drosophila melanogaster genome. The modifications under study are involved in basic chromosomal functions such as DNA replication, gene expression, gene silencing, and inheritance. We will perform Chromatin ImmunoPrecipitation (ChIP) using genomic tiling arrays. We will initially assay localizations using chromatin from three cell lines and two embryonic stages, and will then extend the analysis of a subset of proteins to four additional animal tissues/stages. For data usage terms and conditions, please refer to http://www.genome.gov/27528022 and http://www.genome.gov/Pages/Research/ENCODE/ENCODEDataReleasePolicyFinal2008.pdf EXPERIMENT TYPE: CHIP-chip. BIOLOGICAL SOURCE: Strain: Oregon-R(official name : Oregon-R-modENCODE genotype : wild type ); Developmental Stage: Embryo 2-4hr OR; Genotype: wild type; NUMBER OF REPLICATES: 4; EXPERIMENTAL FACTORS: Strain Oregon-R(official name : Oregon-R-modENCODE genotype : wild type ); Antibody GAF (target is GAF); Developmental Stage Embryo 2-4hr OR

2013-03-27 | E-GEOD-45528 | biostudies-arrayexpress

Zelda determines chromatin accessibility during the Drosophila maternal-to-zygotic transition

Project description:We used FAIRE-seq to perform genome-wide profiling of open chromatin in 2-3 hour Drosophila embryos lacking maternal ZLD (zldM-) and in paired control embryos (yw). We demonstrate that ZLD is required to establish or maintain specific regions of open chromatin. Using single embryo RNA-seq data (from stage 5 yw and zldM- embryos) we show that loci that lose accessibility in zldM- embryos require ZLD for robust expression of associated genes. By comparing our FAIRE peaks to publicly available ChIP data (Xu et al. 2014) we demonstrate that ZLD is required for binding of the transcription factor Bicoid. To our surprise, not all ZLD-bound loci are less accessible in the mutant, suggesting that these regions rely on additional factors for open chromatin. These constitutively accessible ZLD-bound sites are enriched for the GAGA factor (GAF) binding motif, and we therefore propose that GAF may provide this additional function. We conclude that ZLD functions like a pioneer factor to define the cis-regulatory regions that drive gene expression during the MZT. Open chromatin profiling of 2-3 hour Drosophila embryos: embryos lacking maternal ZLD (zldM-, 3 replicates) and paired control embryos (yw, 2 replicates); Genomic DNA Inputs. Sequencing performed on Illumina HiSeq 2000.

2015-08-06 | E-GEOD-65837 | biostudies-arrayexpress

Localization of the pioneer factor GAF to subnuclear foci is driven by DNA binding and required to silence satellite repeat expression [ChIP-Seq]

Project description:The eukaryotic genome is organized to enable the precise regulation of gene expression required for development. This organization is established during early development when the embryo transitions from a fertilized germ cell to the totipotent zygote. To understand the factors and processes that drive genomic organization, we focused on the pioneer factor GAGA factor (GAF) that is required for early embryonic development in Drosophila. GAF transcriptionally activates the zygotic genome and is localized to subnuclear foci. We show that this non-uniform distribution is driven by binding to the highly abundant GA-satellite repeats. At GA-repeats, GAF is necessary to form heterochromatin and silence transcription. Thus, GAF is required to establish both active and silent regions. We propose that the foci formation enables GAF to have opposing transcriptional roles within a single nucleus. Our data support a model in which modulation of the subnuclear concentration of transcription factors acts to organize the nucleus into functionally distinct domains that are essential for the robust regulation of gene expression.

2023-06-27 | GSE218019 | GEO

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