Browse
Submit Data
Databases
API
Help

Dataset Information

0 Views

0 Connections

0 Citations

0 Reanalyses

0 Downloads

Omics score: 0

Cohesin Regulates 3D Accessible Genome Organization and Function

ABSTRACT: we combined Assay for Transposase-Accessible Chromatin and lattice light-sheet PALM microscopy (3D ATAC-PALM) to selectively image key features of the 3D accessible genome in single cells. We found that accessible chromatin domains (ACDs) form spatially segregated clusters in the nucleus. Rapid depletion of CTCF or Cohesin (RAD21 subunit) induced extensive 3D spatial mixing of ACD clusters and reduced physical separation between ACDs within chromosomes. Experimental perturbations and modeling suggest that both weak, multivalent, dynamic protein-protein interactions together with loop extrusion influence ACD organization. Live-cell studies suggest that ACD clustering regulates transcription factor binding site distribution, target search kinetics and binding dynamics. Here we report the ATAC-seq results from Tn5 PA549 and nextera Tn5 upon various chemical and genetic perturbations.

ORGANISM(S): Mus musculus

PROVIDER: GSE144505 | GEO | 2022/02/01

REPOSITORIES: GEO

ACCESS DATA

Json Xml

Similar Datasets

3D ATAC-PALM: Super-resolution Imaging of the Accessible Genome

Project description:Spatial genome organization is essential to direct fundamental DNA-templated biological processes (e.g. transcription, replication, and repair), but the 3D in situ nanometer-scale structure of accessible cis-regulatory DNA elements within the crowded nuclear environment remains elusive. Here, we combined the recently developed Assay for Transposase-Accessible Chromatin with visualization (ATAC-see), PALM super-resolution imaging and lattice light-sheet microscope (a method termed 3D ATAC-PALM) to selectively image and quantitatively analyze key features of the 3D accessible genome in single cells. 3D ATAC-PALM reveals that accessible chromatin are non-homogeneously organized into spatially segregated clusters or accessible chromatin domains (ACDs). To directly link imaging and genomic data, we optimized multiplexed imaging of 3D ATAC-PALM with Oligopaint DNA-FISH, RNA-FISH and protein fluorescence. We found that ACDs colocalize with active chromatin and enclose transcribed genes. By applying these methods to analyze genetically purterbed cells, we demonstrated that genome architectural protein CTCF prevents excessive clustering of accessible chromatin and decompacts ACDs. These results highlight the 3D ATAC-PALM as a useful tool to probe the structure and organizing mechanism of the genome.

2020-01-29 | GSE126112 | GEO

ATAC-Se1 to investigate the spatial choreography of the accessible genome

Project description:In order to completely understand the spatial choreography of the accessible genome in the 3D intact nucleus, we had developed a new technique termed assay of transposase accessible chromatin by visualization (ATAC-see). In brief, we had labeled the adaptor in hypersensitive Tn5 transposase with fluorophore dye and performed the Tn5 tagmentation on the fixed culture cells slide. We had performed ATAC-see in different types of cells and found out there are cell types specific spatial choreography of the accessible genome in the 3D intact nucleus, which is tightly linked to cell types specific function. Importantly, we could images the open chromatin distribution and do the sequencing on the exactly same sample, which offer a powerful tool to understand how the open chromatin organize in the 3D nucleus and how the open chromatin regulate gene expression.

2016-10-05 | GSE76006 | GEO

3D ATAC-PALM: Super-resolution Imaging of the Accessible Genome

Project description:3D ATAC-PALM: Super-resolution Imaging of the Accessible Genome

| PRJNA521044 | ENA

ATAC-seq data in mouse and zebrafish limbs

Project description:Assay for Transposable Accessible Chromatin (ATAC) reveals a genome wide view of areas of open chromatin at very high resolution, which are often associated with regulatory activity. The ATAC-seq technology uses a Tn5 transposase loaded with nex-generation sequencing primers in order to simultaneously fragment areas of open chromatin and ligate adapters.

2015-01-06 | E-GEOD-61065 | biostudies-arrayexpress

ATAC-seq of frozen H1 Human Embryonic Stem Cells (hESC)

Project description:We performed Assay for Transposase-Accessible Chromatin using sequencing (ATAC-seq) to profile genome-wide chromatin accessibility in the human H1 embryonic stem cell (ESC) line. We used this data to train a deep learning model called ChromBPNet which can accurately predict base-resolution accessibility profiles as a function of DNA sequence, while accounting for and correcting biases due the sequence preferences of the Tn5 transposase used in ATAC-seq. We interpreted the models to identify globally predictive transcription factor (TF) motifs, individual predictive motif instances in all accessible regions and Tn5-bias corrected canonical footprints of TFs at these predictive motifs.

2024-05-12 | GSE267154 | GEO

Phase separation of Epstein-Barr virus EBNA2 reorganizes chromatin topology for epigenetic regulation

Project description:Epstein-Barr virus nuclear antigen 2 (EBNA2) is a transactivator of viral and cellular gene expression, which plays a critical role in the Epstein-Barr virus-associated diseases. It was reported that EBNA2 regulates gene expression by manipulating epigenetics, but the details are unclear. Recent studies showed that liquid-liquid phase separation plays an essential role in epigenetic and transcriptional regulation. Through the recently developed ATAC-see technology, we observed that EBNA2 reorganized chromatin topology to form accessible chromatin domains (ACDs) of the host genome by phase separation. The N-terminal region of EBNA2, which is necessary for phase separation, is sufficient to induce ACDs. The C-terminal domain of EBNA2 promotes the acetylation of accessible chromatin regions by recruiting histone acetylase p300 to ACDs. According to these observations, we proposed a model of EBNA2 reorganizing chromatin topology for its acetylation through phase separation to explain the mechanism of EBNA2 hijacking the host genome by controlling its epigenetics. Our findings help to understand the molecular mechanism of the EBV-associated diseases and develop therapeutics for these diseases.

2020-09-22 | GSE158288 | GEO

Global accessibility of mitotic chromosomes

Project description:To test if mitotic chromosomes have decreased accessibility, we utilized Assay for Transposase-Accessible Chromatin using sequencing (ATAC-seq) analysis where the integration of sequencing-compatible adaptors by the Tn5 transposase is directly correlated with the accessibility of genomic regions

2016-11-17 | GSE85184 | GEO

Efficient transcription-coupled chromatin accessibility mapping in situ

Project description:Chromatin accessibility mapping is a powerful approach to identify potential regulatory elements. In the popular ATAC-seq method, Tn5 transposase inserts sequencing adapters into accessible DNA (‘tagmentation’). CUT&Tag is a tagmentation-based epigenomic profiling method in which antibody tethering of Tn5 to a chromatin epitope of interest profiles specific chromatin features in small samples and single cells. Here we show that by simply modifying the tagmentation conditions for histone H3K4me2/3 CUT&Tag, antibody-tethered tagmentation of accessible DNA sites is redirected to produce accessible DNA maps that are indistinguishable from the best ATAC-seq maps. Thus, DNA accessibility maps can be produced in parallel with CUT&Tag maps of other epitopes with all steps from nuclei to amplified sequencing-ready libraries performed in single PCR tubes in the laboratory or on a home workbench. As H3K4 methylation is produced by transcription at promoters and enhancers, our method identifies transcription-coupled accessible regulatory sites.

2020-11-13 | GSE158327 | GEO

Evaluation of Tn5 protein fusions suitable for GET-seq

Project description:This experiment includes the sequencing files for different hp1a-tn5 hybrids, together with standard ATAC-seq and ChIP-seq data used to evaluate the best construct.

2021-08-17 | E-MTAB-9648 | biostudies-arrayexpress

Scalable pooled CRISPR screens with single cell chromatin accessibility profiling.

Project description:A scalable, cost-effective method that combines CRISPR perturbations with a single-cell indexing assay for transposase-accessible chromatin (CRISPR-sciATAC). This method links genome-wide chromatin accessibility to genetic perturbations through simultaneous capture of ATAC-seq fragments and CRISPR guide RNAs from single cells using a 96-well plate combinatorial indexing approach.

2020-11-07 | GSE161002 | 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