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Characterization of dynamic p300 enhancers in murine cardiomyocyte development

ABSTRACT: Characterization of dynamic p300 enhancers in murine cardiomyocyte development

PROVIDER: PRJNA802575 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR17681562_1.fastq.gz	Fastqsanger.gz
	SRR17681562_2.fastq.gz	Fastqsanger.gz
	SRR17681563_1.fastq.gz	Fastqsanger.gz
	SRR17681563_2.fastq.gz	Fastqsanger.gz
	SRR17681564_1.fastq.gz	Fastqsanger.gz

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Characterization of dynamic p300 enhancers in murine cardiomyocyte development [HiC]

Project description:We report the application of bioChIP-seq, bulk RNA-seq, Hi-C, and Massively parallel reporter assays (MPRAs) to characterize the p300-bound regulatory regions in murine cardiomyocytes (CMs). By obtaining ChIP-seq data of coactivator p300 from seven developmental stages of mouse CMs, we defined the dynamic p300 enhancers from embryonic CMs to adult CMs. We then validated the activity of dynamic p300 enhancers with AAV9-based MPRAs, we found dynamic p300 enhancers show dynamic activity from postnatal day 0 (P0) CMs to 4-week-old CMs. In addition, MRPA results suggest nuclear receptor motifs are required for the activity of some p300 late enhancers. With Hi-C data of E12.5, P0 and adult CMs, we identified chromatin structure changes such as chromatin loops, compartment switch, and new TAD boundaries are associated with dynamic p300 binding. This study provides data source of CM-selective p300 enhancers, chromatin 3D structure and gene expression during CM development and maturation.

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Characterization the crosstalk between P300 enhancers and 3D genome in murine cardiomyocyte development and maturation by H3K27ac HiChIP.

Project description:We report the application of bioChIP-seq, bulk RNA-seq, Hi-C, H3K27ac HiChIP, and Massively parallel reporter assays (MPRAs) to characterize the p300-bound regulatory regions in murine cardiomyocytes (CMs). By obtaining ChIP-seq data of coactivator p300 from seven developmental stages of mouse CMs, we defined the dynamic p300 enhancers from embryonic CMs to adult CMs. We then validated the activity of dynamic p300 enhancers with AAV9-based MPRAs, we found dynamic p300 enhancers show dynamic activity from postnatal day 0 (P0) CMs to 4-week-old CMs. In addition, MRPA results suggest nuclear receptor motifs are required for the activity of some p300 late enhancers. With Hi-C and H3K27ac HiChIP data of E12.5, P0 and adult CMs, we identified chromatin structure changes such as chromatin loops, compartment switch, and new TAD boundaries are associated with dynamic p300 binding. This study provides data source of CM-selective p300 enhancers, chromatin 3D structure and gene expression during CM development and maturation.

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Characterization of dynamic p300 enhancers in murine cardiomyocyte development

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

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MLL3/MLL4 are required for CBP/p300 binding on enhancers and super-enhancer formation in brown adipogenesis

Project description:Histone H3K4me1/2 methyltransferases MLL3/MLL4 and H3K27 acetyltransferases CBP/p300 are major enhancer epigenomic writers. To understand how these epigenomic writers orchestrate enhancer landscapes during cell differentiation, we have profiled genomic binding of MLL4, CBP, lineage-determining transcription factors, as well as transcriptome and epigenome during adipogenesis of immortalized preadipocytes derived from mouse brown adipose tissue (BAT). We show that MLL4 and CBP drive the dynamic enhancer epigenome, which correlates with the dynamic transcriptome. MLL3/MLL4 are required for CBP/p300 binding on enhancers activated during adipogenesis. Further, we show that MLL4 and CBP identify super-enhancers of adipogenesis and that MLL3/MLL4 are required for the formation of super-enhancers. Finally, in brown adipocytes differentiated in culture, MLL4 identifies primed super-enhancers of genes fully activated in BAT such as the thermogenic Ucp1. Comparison of MLL4-defined super-enhancers in brown and white adipogenesis predicted a list of brown-specific super-enhancers SEs associated genes that are likely to be important to BAT functions. These results establish MLL3/MLL4 and CBP/p300 as master enhancer epigenomic writers and suggest that enhancer-priming by MLL3/MLL4 followed by enhancer-activation by CBP/p300 sequentially shape dynamic enhancer landscapes during cell differentiation. Our data also provide a rich resource for understanding epigenomic regulation of brown adipogenesis.

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