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Series GSE57316 Query DataSets for GSE57316
Status Public on Oct 22, 2014
Title High resolution Hi-C analysis in S. pombe reveals fundamental elements of genome architecture (NGS)
Organism Schizosaccharomyces pombe
Experiment type Other
Summary Eukaryotic genomes are folded into a hierarchy of three-dimensional structures that impact nuclear functions, including transcription, replication, and repair1-3. Studies in Drosophila and mammals have revealed megabase-sized topologically associated domains (TADs) within chromosomes, which in turn are spatially restricted within the nucleus4-8. However, little is known about local physical constraints that drive higher-order folding of chromosomes. Here we performed Hi-C analysis of the fission yeast Schizosaccharomyces pombe to explore genome organization at high resolution. S. pombe comprises a small genome ideal for examining structural features of chromatin folding, and contains fundamental components present in higher eukaryotes. Large domains of heterochromatin coat centromeres and telomeres and recruit cohesin, a ring-like protein complex that binds sister chromatids and mediates long range looping of interphase chromosomes. Our analyses reveal a highly ordered chromosome organization, consistent with a Rabl configuration, which is dependent on constraints imposed at centromeres and telomeres. We find that local chromatin compaction and cohesin recruitment to centromeres mediated by heterochromatin is required for maintaining global genome territorial restraint. In addition to larger complex domains, we also observed locally interacting regions of chromatin ~50 kilobases long, which organize chromosome arms into structures referred to as “globules”. Globule boundaries are enriched in cohesin and convergent gene orientation. The role of cohesin in maintaining globule domains is independent of its role in sister chromatid cohesion, as globule domains are also a feature of G1 chromosome architecture. Defect in cohesin disrupts globule domains and results in an altered chromosome organization at larger scales, including the loss of chromosome territories. Disruption of globules also affects functional annotation of the genome, leading to impairment of borders between neighboring transcriptional units. Our analyses reveal key features of chromatin organization and folding and show that distinct mechanisms uniquely impact the hierarchy of genome organization to protect genome integrity and to coordinate nuclear functions.
Overall design Comparison of HiC contact maps under various conditions reveal fundamental principles of genome organization
Contributor(s) Grewal S, Mehta S, Takeshi M
Citation(s) 25307058
Submission date May 05, 2014
Last update date May 15, 2019
Contact name Shiv Grewal
Phone 2407607553
Organization name NCI
Department LBMB
Lab Shiv Grewal
Street address NCI bldg 37 Rm 6068 9000 Rockville Pike
City Bethesda
State/province MD
ZIP/Postal code 20892
Country USA
Platforms (1)
GPL13988 Illumina HiSeq 2000 (Schizosaccharomyces pombe)
Samples (5)
GSM1379427 999a_HIC
GSM1379428 999b_HIC
GSM1379429 G1-arrested_HIC
This SubSeries is part of SuperSeries:
GSE56849 High resolution Hi-C analysis in S. pombe reveals fundamental elements of genome architecture
BioProject PRJNA246234
SRA SRP041682

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Supplementary file Size Download File type/resource
GSE57316_RAW.tar 17.5 Mb (http)(custom) TAR (of TSV)
GSE57316_readme.txt 533 b (ftp)(http) TXT
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Raw data are available in SRA
Processed data provided as supplementary file

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