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Danio rerio

ABSTRACT: Enhancers reside in a unique epigenetic environment during early zebrafish development [ChIP-seq & ATAC-seq]

PROVIDER: PRJNA299600 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR2747530.fastq.gz	Fastqsanger.gz
	SRR2747531.fastq.gz	Fastqsanger.gz
	SRR2747526.fastq.gz	Fastqsanger.gz
	SRR2747527.fastq.gz	Fastqsanger.gz
	SRR2747528.fastq.gz	Fastqsanger.gz

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Enhancers reside in a unique epigenetic environment during early zebrafish development [ChIP-seq & ATAC-seq]

Project description:We describe that during early zebrafish development, DNA methylation has little influence on enhancer activity, and that hypo-methylation is a unique feature of primed enhancers, whereas active enhancers are generally hyper-methylated. Hypo-methylated enhancers (hypo-enhancers) are enriched close to important transcription factors (TFs) that act later in development, are specifically de-methylated before the mid blastula transition (MBT), and reside in a unique epigenetic environment. Finally, we demonstrate that hypo-enhancers are functionally active later in development and that they are physically associated with the transcriptional start site (TSS) of target-genes, irrespective of target-gene activity. we analyzed 5 novel ChIP-Seq libraries where we used the following AB (H3K27ac,H3K4me1,H3K4me2 and H3K27ac) and an Atac-Seq library.

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Project description:We describe that during early zebrafish development, DNA methylation has little influence on enhancer activity, and that hypo-methylation is a unique feature of primed enhancers, whereas active enhancers are generally hyper-methylated. Hypo-methylated enhancers (hypo-enhancers) are enriched close to important transcription factors (TFs) that act later in development, are specifically de-methylated before the mid blastula transition (MBT), and reside in a unique epigenetic environment. Finally, we demonstrate that hypo-enhancers are functionally active later in development and that they are physically associated with the transcriptional start site (TSS) of target-genes, irrespective of target-gene activity. We performed 6 different 4C-Seq experiment at two different timepoints and in adult brain.

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Project description:FANS-assisted ATAC-Seq to identify developmentally active endothelial enhancers [ATAC-seq]

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Enhancers reside in a unique epigenetic environment during early development

Project description:During development and differentiation, enhancers, and not promoters are most dynamic in their DNA methylation status. However, the causal relationship between enhancer activity and methylation is not clear. Here, we describe that during early zebrafish development, enhancer activity has little influence on DNA methylation, and that hypo-methylation is a unique feature of primed enhancers, whereas active enhancers are hyper-methylated. Hypo-methylated enhancers (hypo-enhancers) are enriched close to important transcription factors (TFs) that act later in development, are specifically de-methylated before the maternal-zygotic transition (MZT), and reside in a unique epigenetic environment. Finally, we demonstrate that hypo-enhancers are functionally active and that they are physically associated with the transcriptional start site (TSS) of target-genes, irrespective of target-gene activity. In conclusion, we demonstrate that early development in zebrafish represents a time-window characterized by non-canonical DNA methylation-enhancer relationships, including global DNA hypo-methylation of inactive enhancers and DNA hyper-methylation of active enhancers. DNA methylation profiles of 4 time points during zebrafish early development.

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