Browse
Submit Data
Databases
API
Help

Dataset Information

0 Views

0 Connections

0 Citations

0 Reanalyses

0 Downloads

Omics score: 0

Three-dimensional analysis of regulatory features reveals functional enhancer-associated loops

ABSTRACT: To gain insight into the relationship between chromatin structure and gene expression, we conducted a Tethered Chromatin Capture (TCC) analysis using MCF7 breast cancer and PANC1 pancreatic cancer cells. We applied a novel Hi-C analysis algorithm and identified hundreds of thousands of Interacting Loci Pairs (ILPs) in each of the two cell types. We classified ILPs according to location with respect to gene structure, gene expression, different histone modifications, DNase hypersensitivity, and RNA polymerase II and CTCF binding, identifying distinct classes of ILPs. Interestingly, we found that only 5% of the ILPs involved promoter regions, with even fewer promoter-enhancer loops. We find that genes associated with promoter-enhancer loops have cell type-specific functional annotations. We then tested the impact of pharmacological inhibition of histone acetylation on genes having promoter-enhancer ILPs in PANC1 cells. We found that genes with promoter-enhancer ILPs show reduced expression in response to drug treatment, suggesting that the chromatin loops we identified are functional.

ORGANISM(S): Homo sapiens

PROVIDER: GSE68858 | GEO | 2018/02/10

REPOSITORIES: GEO

ACCESS DATA

Json Xml

Similar Datasets

TCC in pluripotent and differentiated cells

Project description:Regulation of gene expression underlies the establishment and maintenance of cell identity. Chromatin structure and gene activity are linked. Recently CTCF anchored loops have been described as major features of chromatin organisation. However, the dynamics and role for these structures in differentiation is unknown. We used Tethered Chromatin Conformation Capture (TCC) to assess for the dynamics of CTCF-anchor loop formation upon differentiation of mouse embryonic stem cells (ESC) and neural stem cells (NSC).

2018-11-08 | E-MTAB-4870 | biostudies-arrayexpress

Temporal dynamic reorganization of 3D chromatin in hormone-induced breast cancer and endocrine resistance

Project description:To establish a data-driven learning model of the temporal dynamics and 3D chromatin reorganization, we conducted tethered chromatin conformation (TCC) sequencing to examine 3D structure dynamics in estradiol (E2)-induced breast cancer MCF7 cells and Tamoxifen resistant breast cancer MCF7 cells.

2019-04-09 | GSE108787 | GEO

Temporal dynamic reorganization of 3D chromatin in hormone-induced breast cancer and endocrine resistance [T47D]

Project description:To establish a data-driven learning model of the temporal dynamics and 3D chromatin reorganization, we conducted tethered chromatin conformation (TCC) sequencing to examine 3D structure dynamics in estradiol (E2)-induced breast cancer T47D cells and Tamoxifen resistant breast cancer T47D cells.

2019-04-09 | GSE119890 | GEO

Dynamic alterations of 3D chromatin structure during differentiation

Project description:Regulation of gene expression underlies the establishment and maintenance of cell identity. Chromatin structure and gene activity are linked at long-range via positioning of loci to transcriptionally permissive (euchromatin) or repressive (heterochromatin) environments and at short-range by connecting cis regulatory elements such as promoters and enhancers. However, the dynamics of these processes during cell differentiation still remains unclear. We used Tethered Chromatin Conformation Capture (TCC) to compare the three dimensional chromatin structure of mouse embryonic stem cells (ESC) and neural stem cells (NSC) which we directly derived from the ESC.

2019-08-27 | E-MTAB-2063 | biostudies-arrayexpress

Dynamic alterations of 3D chromatin structure during differentiation RNA-seq

2019-08-27 | E-MTAB-2125 | biostudies-arrayexpress

Temporal analysis suggests a reciprocal relationship between 3D chromatin structure and transcription [ATAC-Seq]

Project description:3D chromatin structure, enhancers, and gene transcription function together to regulate cellular differentiation, establish cellular identity, and respond to external stimuli; however, the functional interplay between these regulatory elements remains incompletely understood. To infer potential causal relationships, we mapped 3D chromatin architecture, histone H3 K27 acetylation, chromatin accessibility, and gene expression across eight narrowly-spaced time points of macrophage activation. Enhancers and genes that were connected by a loop exhibited stronger correlation between histone H3K27 acetylation and expression than can be explained by distance or proximity alone, suggesting that the presence of a chromatin loop may facilitate functional regulatory connections via methods beyond simply increasing their frequency of physical proximity. Changes in enhancer acetylation preceded changes in gene expression by 30-60 minutes further supporting a causal relationship. Changes in gene expression exhibit a directional bias at differential loop anchors. The anchors of gained enhancer-promoter loops are associated with increased gene expression of genes oriented away from the center of the loop. Surprisingly, lost enhancer-promoter loops were also associated with increased gene expression, particularly within the bounds of the loop. Analysis of absolute levels of transcription revealed that lost loops were characterized by particularly high levels of internal transcription. Taken together, these results are consistent with a reciprocal relationship between looping and transcription. In this model, loops can enhance transcription by facilitating enhancer-promoter contacts, but also high levels of transcription can negatively impact loop strength by antagonizing loop extrusion mechanisms.

2022-04-30 | GSE201351 | GEO

Temporal analysis suggests a reciprocal relationship between 3D chromatin structure and transcription [RNA-Seq]

2022-04-30 | GSE201354 | GEO

Temporal analysis suggests a reciprocal relationship between 3D chromatin structure and transcription [Hi-C]

2022-04-30 | GSE201353 | GEO

Temporal analysis suggests a reciprocal relationship between 3D chromatin structure and transcription [ChIP-Seq]

2022-04-30 | GSE201352 | GEO

Temporal analysis suggests a reciprocal relationship between 3D chromatin structure and transcription

Project description:This SuperSeries is composed of the SubSeries listed below. 3D chromatin structure, enhancers, and gene transcription function together to regulate cellular differentiation, establish cellular identity, and respond to external stimuli; however, the functional interplay between these regulatory elements remains incompletely understood. To infer potential causal relationships, we mapped 3D chromatin architecture, histone H3 K27 acetylation, chromatin accessibility, and gene expression across eight narrowly-spaced time points of macrophage activation. Enhancers and genes that were connected by a loop exhibited stronger correlation between histone H3K27 acetylation and expression than can be explained by distance or proximity alone, suggesting that the presence of a chromatin loop may facilitate functional regulatory connections via methods beyond simply increasing their frequency of physical proximity. Changes in enhancer acetylation preceded changes in gene expression by 30-60 minutes further supporting a causal relationship. Changes in gene expression exhibit a directional bias at differential loop anchors. The anchors of gained enhancer-promoter loops are associated with increased gene expression of genes oriented away from the center of the loop. Surprisingly, lost enhancer-promoter loops were also associated with increased gene expression, particularly within the bounds of the loop. Analysis of absolute levels of transcription revealed that lost loops were characterized by particularly high levels of internal transcription. Taken together, these results are consistent with a reciprocal relationship between looping and transcription. In this model, loops can enhance transcription by facilitating enhancer-promoter contacts, but also high levels of transcription can negatively impact loop strength by antagonizing loop extrusion mechanisms.

2022-04-30 | GSE201376 | GEO

OmicsDI is part of the ELIXIR infrastructure

OmicsDI is an Elixir interoperability service. Learn more ›

OmicsDI Databases

PRIDE
PeptideAtlas
MassIVE
JPOST Repository
Physiome Model Repository

EGA
EVA
ENA
LINCS
PAXDB
Cell Collective

MetaboLights
Metabolomics Workbench
MetabolomeExpress
GNPS
BioModels
FAIRDOMHub

ArrayExpress
dbGaP
ExpressionAtlas
GEO
NODE

Information

Databases
Help
API
Contact us
Code on GitHub
Terms of use
Submit Data