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Single-allele chromatin interactions identify regulatory hubs in dynamic compartmentalized domains [Hi-C]

ABSTRACT: Single-allele chromatin interactions identify regulatory hubs in dynamic compartmentalized domains [Hi-C]

PROVIDER: PRJNA421970 | ENA |

REPOSITORIES: ENA

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Single-allele chromatin interactions identify regulatory hubs in dynamic compartmentalized domains

Project description:Single-allele chromatin interactions identify regulatory hubs in dynamic compartmentalized domains

| PRJNA421963 | ENA

Single-allele chromatin interactions identify regulatory hubs in dynamic compartmentalized domains [Tri-C]

Project description:Single-allele chromatin interactions identify regulatory hubs in dynamic compartmentalized domains [Tri-C]

| PRJNA421281 | ENA

Single-allele chromatin interactions identify regulatory hubs in dynamic compartmentalized domains [Capture-C]

Project description:Single-allele chromatin interactions identify regulatory hubs in dynamic compartmentalized domains [Capture-C]

| PRJNA421280 | ENA

Single-allele chromatin interactions identify regulatory hubs in dynamic compartmentalized domains [Hi-C]

Project description:The genome is organized into self-interacting chromatin domains containing genes and the cis-regulatory elements controlling their expression. How these domains form and how elements within them interact is unknown. We have developed Tri-C, a sensitive, high-resolution Chromosome Conformation Capture (3C) approach to identify concurrent chromatin interactions in single cells. Combining Tri-C with conventional 3C and polymer modeling, we show that, rather than folding into stable pre-formed loops, self-interacting domains form dynamic compartmentalized chromatin structures, delimited by CTCF/Cohesin boundaries. Within these tissue-specific domains, all regions of chromatin contact each other, but preferential structures are formed in which multiple enhancers and promoters interact simultaneously. Flanking CTCF/Cohesin-bound elements are excluded from these interactions and form distinct structures. These observations are best explained by a dynamic loop extrusion mechanism and subsequent stabilization of enhancer-promoter interactions, rather than the current view of long-range interactions occurring via the formation of discrete pre-formed chromatin loops.

2018-08-17 | GSE107939 | GEO

Single-allele chromatin interactions identify regulatory hubs in dynamic compartmentalized domains [Tri-C]

Project description:The genome is organized into self-interacting chromatin domains containing genes and the cis-regulatory elements controlling their expression. How these domains form and how elements within them interact is not fully understood. We have developed Tri-C, a sensitive, high-resolution Chromosome Conformation Capture (3C) approach to identify concurrent chromatin interactions in single cells. Combining Tri-C with conventional 3C and polymer modeling, we show that, rather than folding into stable pre-formed loops, self-interacting domains form dynamic compartmentalized chromatin structures, delimited by CTCF/Cohesin boundaries. Within these tissue-specific domains, all regions of chromatin contact each other, but preferential structures are formed in which multiple enhancers and promoters interact simultaneously. Flanking CTCF/Cohesin-bound elements are excluded from these interactions and form distinct structures. These observations are best explained by a dynamic loop extrusion mechanism and subsequent stabilization of enhancer-promoter interactions, rather than the current view of long-range interactions occurring via the formation of discrete pre-formed chromatin loops.

2018-08-17 | GSE107755 | GEO

Single-allele chromatin interactions identify regulatory hubs in dynamic compartmentalized domains [Capture-C]

Project description:The genome is organized into self-interacting chromatin domains containing genes and the cis-regulatory elements controlling their expression. How these domains form and how elements within them interact is not fully understood. We have developed Tri-C, a sensitive, high-resolution Chromosome Conformation Capture (3C) approach to identify concurrent chromatin interactions in single cells. Combining Tri-C with conventional 3C and polymer modeling, we show that, rather than folding into stable pre-formed loops, self-interacting domains form dynamic compartmentalized chromatin structures, delimited by CTCF/Cohesin boundaries. Within these tissue-specific domains, all regions of chromatin contact each other, but preferential structures are formed in which multiple enhancers and promoters interact simultaneously. Flanking CTCF/Cohesin-bound elements are excluded from these interactions and form distinct structures. These observations are best explained by a dynamic loop extrusion mechanism and subsequent stabilization of enhancer-promoter interactions, rather than the current view of long-range interactions occurring via the formation of discrete pre-formed chromatin loops.

2018-08-17 | GSE107753 | GEO

Single-allele chromatin interactions identify regulatory hubs in dynamic compartmentalized domains.

Project description: Not available

| S-EPMC6265079 | biostudies-literature

Single-allele chromatin interactions identify regulatory hubs in dynamic compartmentalized domains

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

2018-08-17 | GSE107940 | GEO

ecDNA hubs drive cooperative intermolecular oncogene expression [Hi-C]

Project description:ecDNA hubs drive cooperative intermolecular oncogene expression [Hi-C]

| PRJNA732417 | ENA

Integration of Hi-C and ChIP-seq data reveals distinct types of chromatin hubs

Project description:We have analyzed publicly available K562 Hi-C data, which enables genome-wide unbiased capturing of chromatin interactions, using a Mixture Poisson Regression Model to define a highly specific set of interacting genomic regions. We integrated multiple ENCODE Consortium resources with the Hi-C data, using DNase-seq data and ChIP-seq data for 46 transcription factors and 8 histone modifications. We classified 12 different sets (clusters) of interacting loci that can be distinguished by their chromatin modifications and which can be categorized into three types of chromatin hubs. The different clusters of loci display very different relationships with transcription factor binding sites. As expected, many of the transcription factors show binding patterns specific to clusters composed of interacting loci that encompass promoters or enhancers. However, cluster 6, which is distinguished by marks of open chromatin but not by marks of active enhancers or promoters, was not bound by most transcription factors but was highly enriched for 3 transcription factors (GATA1, GATA2, and c-Jun) and 3 chromatin modifiers (BRG1, INI1, and SIRT6). To validate the identification of the clusters and to dissect the impact of chromatin organization on gene regulation, we performed RNA-seq analyses before and after knockdown of GATA1 or GATA2. We found that knockdown of the GATA factors greatly alters the expression of genes within cluster 6. Our work, in combination with previous studies linking regulation by GATA factors with c-Jun and BRG1, provide genome-wide evidence that Hi-C data identifies sets of biologically relevant interacting loci. RNA-seq of control, siGATA1 and siGATA2 K562 cells

2012-06-30 | E-GEOD-32213 | biostudies-arrayexpress

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