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4C-seq analysis of interactions with promoters and enhancers nearby five sex-specific genes, in male and female mouse liver

ABSTRACT: Sequencing files provided here include 4C-seq experiments for a total of 6 viewpoints neighboring 5 highly sex-biased genes in mouse liver. These files are part of a larger study ("CTCF and Cohesin link sex-biased distal regulatory elements to sex-biased gene expression in mouse liver"), where we compare CTCF and cohesin binding in male and female mouse liver as well as differences in chromatin conformation (DNA looping).

ORGANISM(S): Mus musculus

PROVIDER: GSE130911 | GEO | 2020/07/07

REPOSITORIES: GEO

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CTCF and Cohesin (Rad21) ChIP-seq in female mouse liver

Project description:Sequencing files provided here include mouse liver ChIP-seq for CTCF and the cohesin subunit Rad21. These files are part of a larger study ("CTCF and Cohesin link sex-biased distal regulatory elements to sex-biased gene expression in mouse liver") where we compare CTCF and cohesin binding in male and female mouse liver as well as differences in chromatin conformation (DNA looping).

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CTCF and Cohesin link sex-biased distal regulatory elements to sex-biased gene expression in mouse liver

Project description:CTCF and Cohesin link sex-biased distal regulatory elements to sex-biased gene expression in mouse liver

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Project description:Sequencing files provided here are mouse liver RNA-seq in two mouse strains: C57BL/6J and CAST/EiJ. This is part of a larger study published in PLoS Genetics (2021) "Harnessing natural variation to identify cis regulators of sex-biased gene expression in a multi-strain mouse liver model" that includes DNase-seq and H3K27ac ChIP-seq in mouse liver from the same two strains. This allows us to identify strain-shared ("core") and strain-unique sex-biased genes and enhancers.

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Project description:Sequencing files provided here are mouse liver DNase-seq in two mouse strains: C57BL/6J and CAST/EiJ. This is part of a larger study published in PLoS Genetics (2021) "Harnessing natural variation to identify cis regulators of sex-biased gene expression in a multi-strain mouse liver model" that includes RNA-seq and H3K27ac ChIP-seq in mouse liver from the same two strains. This allows us to identify strain-shared ("core") and strain-unique sex-biased genes and enhancers.

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Mouse liver H3K27ac histone marks in male and female mouse liver for two mouse strains: C57BL/6J and CAST/EiJ.

Project description:Sequencing files provided here are mouse liver ChIP-seq for the activating histone mark H3K27ac in two mouse strains: C57BL/6J and CAST/EiJ. This is part of a larger study published in PLoS Genetics (2021) "Harnessing natural variation to identify cis regulators of sex-biased gene expression in a multi-strain mouse liver model" that includes RNA-seq and DNase-seq in mouse liver from the same two strains. This allows us to identify strain-shared ("core") and strain-unique sex-biased genes and enhancers.

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CTCF binding polarity determines chromatin looping [4C]

Project description:CCCTC-binding factor (CTCF) is an architectural protein involved in the three-dimensional organization of chromatin. In this study, we systematically assayed the 3D genomic contact profiles of hundreds of CTCF binding sites in multiple tissues with high-resolution 4C-seq. We find both developmentally stable and dynamic chromatin loops. As recently reported, our data also suggest that chromatin loops preferentially form between CTCF binding sites oriented in a convergent manner. To directly test this, we used CRISPR-Cas9 genome editing to delete core CTCF binding sites in three loci, including the CTCF site in the Sox2 super-enhancer. In all instances, CTCF and cohesin recruitment were lost, and chromatin loops with distal CTCF sites were disrupted or destabilized. Re-insertion of oppositely oriented CTCF recognition sequences restored CTCF and cohesin recruitment, but did not re-establish chromatin loops. We conclude that CTCF binding polarity plays a functional role in the formation of higher order chromatin structure. 4C-seq was performed on a large number of viewpoints in E14 embryonic stem cells, neural precursor cells and primary fetal liver cells

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Changes in chromatin accessibility due to hypophysectomy (hypox) and a single exogenous pulse of GH/STAT5 in mouse liver

Project description:Sequencing files provided here are mouse liver DNase-seq to identify DNase hypersensitive sites (DHS) in livers from intact and hypox female, hypox male, and hypox male mice given a single injection of GH and then euthanized 30, 90, or 240 minutes later. This is part of a larger study that includes DNase-seq in mouse liver from intact males determined to be STAT5-high or STAT5-low based on an endogenous pulse of GH/STAT5. This allows us to identify GH pulse-responsive DHS and better understand male-biased DHS regulation of sex-biased genes. Overall, our findings establish that pulsatile chromatin opening stimulated by endogenous, physiological hormone pulses is a novel mechanism for establishing widespread sex differences in chromatin accessibility and transcription factor binding, which are closely linked to sex-biased gene expression and the sexual dimorphism of liver function.

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Project description:Here we map six chromatin modifications -- H3K4me1, H3K4me3, H3K27ac, H3K36me3, H3K9me3, and H3K27me3 -- genome-wide in male and female mouse liver in order to identify histone modifications that characterize sex-biased genes and sex-biased DNase hypersensitive sites and their regulation by plasma growth hormone (GH) profiles, which are sexually dimorphic. We find distinct mechanisms of regulation in male liver and female liver: sex-dependent K27me3-mediated repression is an important mechanism of repression of female-biased, but not of male-biased, genes, and a sex-dependent K4me1 distribution, suggesting nucleosome repositioning by pioneer factors, is observed at male-biased, but not female-biased, regulatory sites. STAT5-mediated activation is most strongly associated with sex-biased chromatin modifications, while BCL6-mediated repression primarily occurs in association with sex-independent chromatin modifications, both at binding sites and at target genes. These samples are part of a study on chromatin states in male and female mouse and their role in sex-biased liver gene expression (A Sugathan and DJ Waxman (2013) Molec Cell Biol).

2013-07-03 | GSE44571 | GEO

Identification of Hnf6 binding sites in male and female mouse liver

Project description:∼40,000 HNF6 binding sites were identified in mouse liver chromatin, including several thousand sites showing significant differences in level of HNF6 binding between male and female mouse liver. These sex-biased HNF6 binding sites showed strong enrichment for sex-biased DNase hypersensitive sites and for proximity to genes showing local sex-biased chromatin marks and a corresponding sex-biased expression. ~90% of genome-wide CUX2 binding sites identified previously in female mouse liver (Conforto TL, Zhang Y, Sherman J, Waxman DJ., Mol Cell Biol. 2012;32(22):4611-4627) were also bound by HNF6, giving evidence for genome-wide competition between HNF6 and CUX2 for chromatin binding in female mouse liver. These HNF6/CUX2 common binding sites were enriched for genomic regions more accessible in male than in female mouse liver chromatin, and showed strongest enrichment for male-biased genes, suggesting HNF6 displacement by CUX2 as a mechanism to explain the observed CUX2 repression of male-biased genes in female liver. However, HNF6 binding was sex-independent at a majority of its binding sites, and peak regions of HNF6 binding were frequently associated with co-binding by multiple other liver transcription factors, consistent with HNF6 playing a global regulatory role in both male and female liver.

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4C-seq analysis of interactions with the Albumin promoter in mouse liver

Project description:Sequencing files provided here include mouse liver ChIP-seq for CTCF and the cohesin subunit Rad21, and 4C-seq analyses in male and female mouse liver centered at an Albumin promoter viewpoint. These files are part of a larger study where we describe features of Topologically Associating Domains (TADs) and their impact on liver gene expression, then use these features to computationally predict subTAD structures not otherwise readily identifiable due to the low resolution of Hi-C. Our findings reveal that CTCF-based subTAD loops maintain key insulating properties of TADs, and support the proposal that subTADs are formed by the same loop extrusion mechanism and contribute to nuclear architecture as intra-TAD scaffolds that further constrain enhancer-promoter interactions. This allows high expression of super enhancer target genes and individual genes within inactive TADs, and may be a broadly conserved mechanism of genomic regulation.

2018-05-11 | GSE102998 | GEO

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