Browse
Submit Data
Databases
API
Help

Unknown,Transcriptomics,Genomics,Proteomics

Dataset Information

0 Views

0 Connections

0 Citations

0 Reanalyses

0 Downloads

Omics score: 0

In situ Hi-C study of chromatin conformation during early Drosophila development

ABSTRACT: In this experiment we examined higher order chromatin structure during early Drosophila melanogaster development. We performed in situ Hi-C for hand-sorted non-mitotic embryos at nuclear cycle number 12, 13 and 14, and for embryos at 3-4 hours post fertilisation. During this time in development, the zygotic genome is activated and zygotic transcription is taking place for the first time. To assess the impact of transcription on chromatin structure we injected the transcription inhibitors alpha-amanitin or triptolide before zygotic genome activation and performed Hi-C and ChIP-seq for RNA Pol II. Furthermore, we used Hi-C to study genome architecture in embryos lacking the transcription factor Zelda.

INSTRUMENT(S): Illumina MiSeq, NextSeq 500

ORGANISM(S): Drosophila melanogaster

SUBMITTER: Clemens Hug

PROVIDER: E-MTAB-4918 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

ACCESS DATA

Json Xml

Publications

Chromatin Architecture Emerges during Zygotic Genome Activation Independent of Transcription.

Hug Clemens B CB Grimaldi Alexis G AG Kruse Kai K Vaquerizas Juan M JM

Cell 20170401 2

Chromatin architecture is fundamental in regulating gene expression. To investigate when spatial genome organization is first established during development, we examined chromatin conformation during Drosophila embryogenesis and observed the emergence of chromatin architecture within a tight time window that coincides with the onset of transcription activation in the zygote. Prior to zygotic genome activation, the genome is mostly unstructured. Early expressed genes serve as nucleation sites for ...[more]

PMID: 28388407

Similar Datasets

Four Hi-C datasets from mESCs and 2C-like cells generated by knocking down the histone chaperone CAF-1 in mESCs

Project description:In this experiment, we've examined chromatin conformation of mESCs and 2C-like cells generated from a CAF-1 knockdown. The method to generate the knockdown was described in (). We performed a modified in situ Hi-C protocol from (Rao et al., 2014) and that can be found in detail at (Díaz et al., 2017, under revision). Samples were digested with MboI restriction enzyme having as starting material 100k cells with two biological replicates per sampling point. The aim of the experiment was to analyze the potential chromatin conformational changes that accompany the mESC to 2C-like transition.

2023-11-16 | E-MTAB-6330 | biostudies-arrayexpress

Chromatin contact maps of 24 and 48 hours post-fertilisation zebrafish (Danio rerio) embryos and 48 hours post-fertilisation fibroblasts

Project description:In this experiment, we've examined chromatin conformation of zebrafish embryos at 24 and 48 hours post-fertilization (hpf), as well as 48 hpf fibroblasts. The aim of this study was to characterise the 3D chromatin structure of zebrafish and perform an evolutionary comparison with mammalian genomes (Homo sapiens and Mus musculus) focusing on syntenic regions and zebrafish ohnologs (duplicated genes that were kept in the genome after the third round of whole-genome duplication).

2023-11-17 | E-MTAB-6313 | biostudies-arrayexpress

Hi-C of Drosophila embryos to investigate chromatin conformation during dorsal-ventral patterning

Project description:Hi-C was carried out for control embryos and embryos produced from gd7, Tollrm9/rm10, and Toll10B mutant mothers. The embryos from mutant mothers produce only a single type along the dorsal-ventral axis. We used these embryos to compare chromatin conformation across tissues.

2021-01-08 | E-MTAB-9306 | biostudies-arrayexpress

Low input Hi-C datasets for a diffuse large B-cell lymphoma sample, healthy control human B-cells and mouse embryonic stem cells

Project description:In this experiment, we've examined chromatin conformation of OG2 (B6; CBA-Tg(Pou5f1-EGFP)2Mnn/J; stock number 004654) mouse stem cells cultured as described in (Shi et al., 2008), using different amounts of starting cells. We performed a modified in situ Hi-C protocol for 6 samples digested with MboI restriction enzyme having as starting material 1 million (M), 100 thousand (k), 50k, 25k, 10k or 1k cells. As well as, to 2 samples digested with HindIII restriction enzyme that had as starting material 5M or 100k cells. Traditional in situ Hi-C protocols recommend 5-10 million starting cells. The aim of the experiment was to assess the impact of decreasing the cell number on reproducibility, library complexity, chromatin structure visualization in order to adapt the method to the study of rare cell populations. Furthermore, we have characterised the 3D structure of peripheral blood mononuclear cells (PBMCs) obtained from a blood extraction from a healthy donor and from a lymph node biopsy from a DLBCL patient as a proof of concept for the suitability of Low-C for rare cell population analysis.

2018-11-30 | E-MTAB-5875 | biostudies-arrayexpress

ChIP-seq of definitive endoderm cells derived in vitro from human embryonic stem cells in order to study the role of transcription factor GATA6 in human pancreas development

Project description:Mutant GATA6 hPSCs were obtained by TALEN genome editing or re-programmed from patient fibroblasts. Along with wild-type H9 cells, these GATA6 mutant cell lines were differentiated into SOX17+/CXCR4+ endodermal cells (day 3). The purpose of this work was to study the role of GATA6 in the development of the human pancreas at a molecular level.

2019-03-13 | E-MTAB-5959 | biostudies-arrayexpress

ChIP-seq of SMRT in CD8α+ DCs at 0hr and 6hr CpG stimulation

Project description:SMRT ChIP-seq were performed to identify binding site of SMRT in CD8α+ DCs at 0hr and 6hr CpG stimulation.

2022-09-20 | E-MTAB-10069 | biostudies-arrayexpress

Drosophila melanogaster Micro-C experiments of wild-type and ectopic E3 enhancer-inserted Drosophila embryos

Project description:Micro-C in Drosophila embryos from a wild-type line and from transgenic fly line twiΔE3, E3(+51kb) at 5-8 hrs after egg lay. Two independent collections were performed. Data from the two genotypes were analysed and compared to understand how the ectopic insertion of an enhancer affects global chromatin organization.

2023-08-01 | E-MTAB-12146 | biostudies-arrayexpress

Genome wide H3K9ac and SAGA occupancy at OX growth phase and RC quiescent phase of yeast metabolic cycle

Project description:We found acetyl-CoA levels increase when cells are committed to growth. We also found 3 components of the SAGA complex, Spt7p, Sgf73p and Ada3p as well as histones are dynamically acetylated in tune with the acetyl-CoA levels. ChIP-seq study reveals SAGA and H3K9ac predominantly occupy growth genes at the OX growth phase of the yeast metabolic cycle indicating acetyl-CoA levels may drive growth gene transcription program through acetylation of these proteins. Examination of H3K9ac and SAGA binding over two timepoints using H3 and Input as controls

2011-05-19 | E-GEOD-28734 | biostudies-arrayexpress

Chromatin accessibility maps of chronic lymphocytic leukemia identify subtype-specific epigenome signatures and transcription regulatory networks

Project description:Chronic lymphocytic leukemia (CLL) is characterized by substantial clinical heterogeneity, despite relatively few genetic alterations. To provide a basis for studying epigenome deregulation in CLL, we established genome-wide chromatin accessibility maps for 88 CLL samples from 55 patients using the ATAC-seq assay, and we also performed ChIPmentation and RNA-seq profiling for ten representative samples. Based on the resulting dataset, we devised and applied a bioinformatic method that links chromatin profiles to clinical annotations. Our analysis identified sample-specific variation on top of a shared core of CLL regulatory regions. IGHV mutation status â which distinguishes the two major subtypes of CLL â was accurately predicted by the chromatin profiles, and gene regulatory networks inferred for IGHV-mutated vs. IGHV-unmutated samples identified characteristic differences between these two disease subtypes. In summary, we found widespread heterogeneity in the CLL chromatin landscape, established a community resource for studying epigenome deregulation in leukemia, and demonstrated the feasibility of chromatin accessibility mapping in cancer cohorts and clinical research. Genome-wide profiling of chromatin states and gene expression levels in 88 CLL samples from 55 individuals gave rise to 88 ATAC-seq profiles, 40 ChIPmentation profiles (10 samples, each with 3 different antibodies and matched immunoglobulin control), and 10 RNA-seq profiles. Raw sequence data has been deposited at the EBI's European Genome-phenome Archive (EGA) under the accession number EGAS00001001821 (controlled access to protect patient privacy).

2016-06-26 | E-GEOD-81274 | biostudies-arrayexpress

A high-resolution view of transcription and chromatin states across distinct metabolic states in budding yeast

Project description:Under continuous, glucose-limited conditions, budding yeast exhibit robust metabolic cycles associated with major oscillations of gene expression and metabolic state. However, how such fluctuations might be coordinately linked to changes in chromatin status is less well understood. Here, we examine the correlated genome-wide transcription and chromatin states across the yeast metabolic cycle (YMC) at unprecedented temporal resolution, revealing a "just in time supply chain" by which specific cellular processes such as ribosome biogenesis are coordinated in time with remarkable precision. We identify distinct chromatin and splicing patterns associated with different gene categories and determine the relative timing of chromatin modifications to maximal transcription. Additionally, we interrogate chromatin modifier occupancy and observe subtly distinct spatial and temporal patterns compared to the modifications themselves. Furthermore, we identify multiple lysine mutants in H3 or H4 tails that disrupt metabolic cycling, supporting a potentially cooperative role of histone modifications in the YMC. 16 time points RNA-seq and ChIP-seq of 8 histone marks over one metabolic cycle, 14 time points ChIP-seq of 3 chromatin modifiers over one metabolic cycle

2014-08-31 | E-GEOD-52339 | biostudies-arrayexpress

OmicsDI is part of the ELIXIR infrastructure

OmicsDI is an Elixir interoperability service. Learn more ›

Tweets

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