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Mus musculus

ABSTRACT: Diurnal changes of HDAC3, Rev-erbα, NCoR and Pol II recruitment to the mouse liver genome and of H3K9Ac

OTHER RELATED OMICS DATASETS IN: E-GEOD-25937

PROVIDER: PRJNA136929 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR351386.fastq.gz	Fastqsanger.gz
	SRR351387.fastq.gz	Fastqsanger.gz
	SRR351388.fastq.gz	Fastqsanger.gz
	SRR351389.fastq.gz	Fastqsanger.gz
	SRR351390.fastq.gz	Fastqsanger.gz

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Diurnal changes of HDAC3, Rev-erbα, NCoR and Pol II recruitment to the mouse liver genome and of H3K9Ac

Project description:We reported a diurnal changes in the recruitment of HDAC3, Rev-erbα, NCoR and Pol II to the mouse liver genome as well as H3K9 acetylation in vivo at ZT10 and ZT22. ChIP-Seq profiling of HDAC3, Rev-erbα, NCoR and Pol II binding and H3K9Ac in mouse liver harvested at 2 different times (ZT10 and ZT22) of the day

2011-03-11 | E-GEOD-26345 | biostudies-arrayexpress

Diurnal changes of HDAC3, Rev-erbα, NCoR and Pol II recruitment to the mouse liver genome and of H3K9Ac

Project description:We reported a diurnal changes in the recruitment of HDAC3, Rev-erbα, NCoR and Pol II to the mouse liver genome as well as H3K9 acetylation in vivo at ZT10 and ZT22.

2011-03-11 | GSE26345 | GEO

Rev-erbα Dynamically Modulates Chromatin Organization to Control Circadian Gene Transcription

Project description:Much of mammalian physiology exhibits 24-hour cyclicity due to circadian rhythms of gene expression controlled by transcription factors (TF) that comprise molecular clocks. Core clock TFs bind to the genome at non-coding enhancer sequences to regulate circadian gene expression, but not all binding sites are equally functional. Here we demonstrate that circadian gene expression in mouse liver is controlled by rhythmic chromatin interactions between enhancers and promoters within topologically associating domains (TAD). Rev-erbα-, a core repressive TF of the clock, opposes functional loop formation between Rev-erbα-regulated enhancers and circadian target gene promoters by recruitment of the NCoR-HDAC3 corepressor complex, histone deacetylation, and eviction of the elongation factor BRD4 and the looping factor MED1. These loops are stronger and functionally active in the physiological or genetic absence of Rev-erbα.Thus, a repressive arm of the molecular clock operates by rhythmically interrupting enhancer-promoter loops to control circadian gene transcription.

2018-02-09 | GSE104129 | GEO

Structural basis for heme-dependent NCoR binding to the transcriptional repressor REV-ERBβ

Project description:Heme is the endogenous ligand for the constitutively repressive REV-ERB nuclear receptors, REV-ERBα (NR1D1) and REV-ERBβ (NR1D2), but how heme regulates REV-ERB activity remains unclear. While cellular studies indicate heme is required for the REV-ERBs to bind the corepressor NCoR and repress transcription, fluorescence-based biochemical assays and crystal structures suggest that heme displaces NCoR. Here, we found that heme artifactually influences detection of NCoR interaction in fluorescence-based assays. Using fluorescence-independent methods, including isothermal titration calorimetry, NMR spectroscopy, and XL-MS, we determined that heme remodels the thermodynamic profile of NCoR binding to REV-ERBβ ligand-binding domain (LBD) and directly increases LBD binding affinity for an NCoR interaction motif. We further report two crystal structures of REV-ERBβ LBD cobound to heme and NCoR peptides, which reveal the heme-dependent NCoR binding mode. By resolving previous contradictory biochemical, structural, and cellular studies, our findings should facilitate renewed progress toward understanding heme-dependent REV-ERB activity.

2021-02-24 | PXD021761 | Pride

Genome-wide maps of BAF180 and REV-ERBα binding

Project description:We generated genome-wide cistromes of BAF180 subunit of the SWI-SNF chromatin remodeling complex in mouse liver at CT10 and CT22. In addition, we performed ChIP-Seq analysis on REV-ERBα in WT and SRC-2-/- mouse liver at CT10. We found circadian oscilation of BAF180 chromatin recruitment in mouse liver with peak recruitment at CT22 and nadir at CT10. Further,REV-ERBα chromatin recruitment was significantly reduced in SRC-2-/- mouse liver compared to WT mice at CT10.

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Project description:Rev-erbα/β are druggable components of the molecular circadian clock. Rev-erb agonists can mitigate pressure overload-induced cardiac hypertrophy and myocardial infarction in mice, while Rev-erb antagonist increases myocardial ischemia-reperfusion tolerance ex vivo at the sleep-to-wake transitionHow cardiac Rev-erb regulates heart function has not been studied in vivo. ChIP-seq of Rev-erbα in the heart confirmed the robust diurnal rhythmicity of Rev-erbα genome binding with about 5 times more binding at ZT9 than at ZT21.

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Project description:We reported changes in the recruitment of H3K9ac and H3K27ac in HDAC3-depleted mouse testes in the late meiotic and early haploid stages. We also investigated genome-wide occupancy of HDAC3, NCOR and Sox30 to the mouse testes from wild-type and Sox30 KO mice.

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Integral roles for Rev-erb alpha and Rev-erb beta in the circadian clock function [ChIP_seq]

Project description:The circadian clock acts at the genomic level to coordinate internal behavioral and physiologic rhythms via the CLOCK-BMAL transcriptional heterodimer. Although the nuclear receptors REV-ERBα and β have been proposed to contribute to clock function, their precise roles and importance remain unresolved. To establish their regulatory potential we generated comparative cistromes of both Rev-erb isoforms, which revealed shared recognition at over ~50% of their total sites and extensive overlap with the master clock regulator Bmal. While Rev-erbα has been shown to directly regulate Bmal expression, the cistromic analysis reveals a more profound connection between Bmal and Rev-erbα and β regulatory circuits than previously suspected. Genes within the intersection of the Bmal and Rev-erb cistromes are highly enriched for both clock and metabolic functions. As predicted by the cistromic analysis, dual depletion of Rev-erbα/β function by creating double-knockout mice (DKOs) profoundly disrupted circadian expression of core clock and lipid homeostatic genes. As a result, DKOs show strikingly altered circadian wheel-running behavior and deregulated lipid metabolism. These data reveal an integral role of Rev-erbα/β in clock function as well as provide a cistromic basis for the integration of circadian rhythm and metabolism. Identification of Reverb alpha and Reverb beta binding sites in mouse liver at ZT8

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NCoR/SMRT co-repressors cooperate with c-MYC to create an epigenetic barrier to somatic cell reprogramming [ChIP-Seq]

Project description:Changing the somatic cell transcriptome to a pluripotent state using exogenous reprogramming factors needs transcriptional co-regulators that help activate or suppress gene expression and rewrite the epigenome. Here, we show that reprogramming-specific engagement of the NCoR/SMRT co-repressor complex at key pluripotency loci creates an epigenetic block to reprogramming. HDAC3 executes the repressive function of NCoR/SMRT in reprogramming by inducing histone deacetylation at these loci. Recruitment of NCoR/SMRT-HDAC3 to pluripotency genes is facilitated by all 4 Yamanaka factors (OCT4, SOX2, KLF4 and c-MYC) but mostly by c-MYC. Class IIa HDACs further potentiate this recruitment by interacting with both the reprogramming factors and NCoR/SMRT. Consequently, depleting NCoR/SMRT-HDAC3 function enables high efficiency of reprogramming, while elevating NCoR/SMRT-HDAC3 recruitment at pluripotency loci by over-expressing constitutively active class IIa HDACs derails it. Our findings thus uncover an unexpected epigenetic mechanism involving c-MYC, whose manipulation greatly enhances reprogramming efficiency.

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