Saccharomyces cerevisiae
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA319003 | ENA |
REPOSITORIES: ENA
Similar Datasets
Project description:Cohesin-dependent compaction of mitotic chromosomes in budding yeast
| PRJNA344307 | ENA
Project description:Budding yeast cohesin (Mcd1) distribution in mitotically arrested cells
| PRJNA119255 | ENA
Project description:Rec8 guides canonical Spo11 distribution along yeast meiotic chromosomes
| PRJNA101475 | ENA
Project description:FACT mediates cohesin function on chromatin Cohesin is a key regulator of genome architecture with roles in sister chromatid cohesion and the organisation of higher-order structures during interphase and mitosis. The recruitment and mobility of cohesin complexes on DNA are restricted by nucleosomes. Here we show that cohesin role in chromosome organization requires the histone chaperone FACT. Depletion of FACT in metaphase cells affects cohesin stability on chromatin reducing its accumulation at pericentric regions and binding on chromosome arms. Using Hi-C, we show that cohesin-dependent TAD (Topological Associated Domains)-like structures in G1 and metaphase chromosomes are disrupted in the absence of FACT. Surprisingly, sister chromatid cohesion is intact in FACT-depleted cells, although chromosome segregation failure is observed. Our results uncover a role for FACT in genome organisation by facilitating cohesin dependent compartmentalization of chromosomes into loop domains.
2019-10-03 | PXD014896 | Pride
Project description:Evidence that Loading of Cohesin Onto Chromosomes Involves Opening of Its SMC Hinge
| PRJNA95639 | ENA
Project description:Cell cycle dependent nucleosome occupancy at cohesin binding sites in yeast chromosomes
| PRJNA101013 | ENA
Project description:The ring-like cohesin complex plays an essential role in chromosome segregation, organization, and double-strand break repair through its ability to bring two DNA double helices together. Scc2 (NIPBL in humans) together with Scc4 function as the loader of cohesin onto chromosomes. Chromatin adapters such as the RSC complex facilitate localization of the Scc2-Scc4 cohesin loader. Here we identify a broad range of Scc2- chromatin protein interactions that are evolutionarily conserved and reveal a role for one complex, Mediator, in recruitment of the cohesin loader. We identified budding yeast Med14, a subunit of the Mediator complex, as a high copy suppressor of poor growth in Scc2 mutant strains. Physical and genetic interactions between Scc2 and Mediator are functionally substantiated in direct recruitment and cohesion assays. Depletion of Med14 results in defective sister chromatid cohesion and decreased binding of Scc2 at RNA Pol II transcribed genes. Previous work has suggested that Mediator, Nipbl, and cohesin connect enhancers and promoters of active mammalian genes. Our studies suggest an evolutionarily conserved fundamental role for Mediator in direct recruitment of Scc2 to RNA pol II transcribed genes. We identified two mutations in the evolutionarily conserved HEAT domain of SCC2 that result in significantly reduced growth, scc2R787G and scc2G1242V. This experiment uses ChIP Seq to examine global localization of Scc2 in the presence or absence of MED14.
2022-05-25 | GSE201193 | GEO
Project description:The DNA double strand breaks (DSBs) that initiate meiotic recombination are formed in the context of the meiotic chromosome axis, which in budding yeast contains a meiosis-specific cohesin isoform and the meiosis-specific proteins Hop1 and Red1. Hop1 and Red are important for DSB formation; DSB levels are reduced in their absence and their levels, which vary along the lengths of chromosomes, are positively correlated with DSB levels. How axis protein levels influence DSB formation and recombination remains unclear. To address this question, we developed a novel approach that uses a bacterial ParB-parS partition system to recruit axis proteins at high levels to inserts at recombination coldspots where Hop1 and Red1 levels are normally low. Recruiting Hop1 markedly increased DSBs and homologous recombination at target loci, to levels equivalent to those observed at endogenous recombination hotspots. This local increase in DSBs did not require Red1 or the meiosis-specific cohesin component Rec8, indicating that, of the axis proteins, Hop1 is sufficient to promote DSB formation. However, while most crossovers at endogenous recombination hotspots are formed by the meiosis-specific MutLγ resolvase, only a small fraction of crossovers that formed at an insert locus required MutLγ, regardless of whether or not Hop1 was recruited to that locus. Thus, while local Hop1 levels determine local DSB levels, the recombination pathways that repair these breaks can be determined by other factors, raising the intriguing possibility that different recombination pathways operate in different parts of the genome.
2022-07-12 | GSE201240 | GEO
Project description:Paired-end sequencing study of nucleosomal DNA prepared from budding yeast by micrococcal nuclease digestion.
2011-07-20 | GSE26493 | GEO
Project description:The ring-shaped cohesin complex is thought to topologically hold sister chromatids together from their synthesis in S-phase until chromosome segregation in mitosis. How cohesin stably binds to chromosomes for extended periods, without impeding other chromosomal processes that also require access to the DNA, is poorly understood. Budding yeast cohesin is loaded onto DNA by the Scc2-Scc4 cohesin loader at centromeres and promoters of active genes, from where cohesin translocates to more permanent places of residence at transcription termination sites. Here we show that, at the GAL2 and MET17 loci, pre-existing cohesin is pushed downstream along the DNA in response to transcriptional gene activation, apparently without need for intermittent dissociation or reloading. We observe translocation intermediates and find that the distribution of most chromosomal cohesin is shaped by transcription. Our observations support a model in which cohesin is able to slide laterally along chromosomes while maintaining topological contact with DNA. In this way, stable cohesin binding to DNA and enduring sister chromatid cohesion become compatible with simultaneous underlying chromosomal activities, including but maybe not limited to transcription.
2016-04-21 | GSE80464 | GEO