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Clustered regulatory signals at nucleosome-depleted regions punctuate a constant nucleosomal landscape in Schizosaccharomyces pombe [Affymetrix]

ABSTRACT: Mononucleosomal DNA analysis of atf1D and pcr1D mutants of Schizosaccharomyces pombe and transcription analysis of exponential wild type 972 h-, atf1D, pcr1D and mitotic diploid pat1.114, and synchronous diploid pat1.114 at 0h, 3h and 5h into meiosis

ORGANISM(S): Schizosaccharomyces pombe

PROVIDER: GSE41770 | GEO | 2013/11/25

SECONDARY ACCESSION(S): PRJNA178152

REPOSITORIES: GEO

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Clustered regulatory signals at nucleosome-depleted regions punctuate a constant nucleosomal landscape in Schizosaccharomyces pombe

Project description:Mononucleosomal DNA analysis of atf1D and pcr1D mutants of Schizosaccharomyces pombe and transcription analysis of exponential wild type 972 h-, atf1D, pcr1D and mitotic diploid pat1.114, and synchronous diploid pat1.114 at 0h, 3h and 5h into meiosis Mononucleosomal DNA vs. genomic input DNA in wildtype 972 h-, atf1D and pcr1D mutants of S. pombe was hybridized to Affymetrix GeneChip 1.0FR tiling microarrays (GPL7715). Total RNA for genome-wide transcription analysis from exponential wild type 972 h-, atf1D, pcr1D and mitotic diploid pat1.114 cells, and from synchronous diploid pat1.114 at 0h, 3h and 5h into meiosis was hybridized to the same microarrays.

2013-11-25 | E-GEOD-41770 | biostudies-arrayexpress

Clustered regulatory signals at nucleosome-depleted regions punctuate a constant nucleosomal landscape in Schizosaccharomyces pombe

Project description:Sequencing of mononucleosomal DNA during asynchronous mitosis and 0, 3 and 5 hours into meiosis in Schizosaccharomyces pombe. Two samples from mononucleosomal DNA from asynchronous mitosis (haploid 972 h- and diploid pat1.114) and three samples from 0, 3 and 5 hours into meiosis (from diploid pat1.114) were sequenced (Illumina Genome Analyzer IIx) using the single-end read protocol.

2013-11-25 | E-GEOD-41772 | biostudies-arrayexpress

Clustered regulatory signals at nucleosome-depleted regions punctuate a constant nucleosomal landscape in Schizosaccharomyces pombe [NGS_Illumina]

Project description:Sequencing of mononucleosomal DNA during asynchronous mitosis and 0, 3 and 5 hours into meiosis in Schizosaccharomyces pombe.

2013-11-25 | GSE41772 | GEO

Clustered regulatory elements at nucleosome-depleted regions punctuate a constant nucleosomal landscape in Schizosaccharomyces pombe.

Project description:BACKGROUND: Nucleosomes facilitate the packaging of the eukaryotic genome and modulate the access of regulators to DNA. A detailed description of the nucleosomal organization under different transcriptional programmes is essential to understand their contribution to genomic regulation. RESULTS: To visualize the dynamics of individual nucleosomes under different transcriptional programmes we have generated high-resolution nucleosomal maps in Schizosaccharomyces pombe. We show that 98.5% of the genome remains almost invariable during mitosis and meiosis while remodelling is limited to approximately 1100 nucleosomes in the promoters of a subset of meiotic genes. These inducible nucleosome-depleted regions (NDR) and also those constitutively present in the genome overlap precisely with clusters of binding sites for transcription factors (TF) specific for meiosis and for different functional classes of genes, respectively. Deletion of two TFs affects only a small fraction of all the NDRs to which they bind in vivo, indicating that TFs collectively contribute to NDR maintenance. CONCLUSIONS: Our results show that the nucleosomal profile in S. pombe is largely maintained under different physiological conditions and patterns of gene expression. This relatively constant landscape favours the concentration of regulators in constitutive and inducible NDRs. The combinatorial analysis of binding motifs in this discrete fraction of the genome will facilitate the definition of the transcriptional regulatory networks.

| S-EPMC4046669 | biostudies-literature

Clustered regulatory signals at nucleosome-depleted regions punctuate a constant nucleosomal landscape in Schizosaccharomyces pombe

Project description:This SuperSeries is composed of the SubSeries listed below.

2013-11-25 | GSE41773 | GEO

Clustered regulatory signals at nucleosome-depleted regions punctuate a constant nucleosomal landscape in Schizosaccharomyces pombe

Project description:This SuperSeries is composed of the SubSeries listed below. Refer to individual Series

2013-11-25 | E-GEOD-41773 | biostudies-arrayexpress

Different nucleosomal landscapes at early and late replicating origins in Saccharomyces cerevisiae

Project description:Sequencing of mononucleosomal DNA during G1 and S phases in Saccharomyces cerevisiae

2014-09-09 | GSE54377 | GEO

Expression of FUS-CHOP fusion protein in immortalized/transformed human Mesenchymal Stem Cells drives mixoid liposarcoma formation

Project description:Although different sarcomas have been modeled in mice upon expression of fusion oncogenes in MSCs, sarcomagenesis has not been successfully modeled in human MSCs (hMSCs). We report that FUS-CHOP, a hallmark fusion gene in mixoid liposarcoma (MLS), has an instructive role in lineage commitment, and its expression in hMSC sequentially immortalized/transformed with up to 5 oncogenic hits (p53 and Rb deficiency, hTERT over-expression, c-myc stabilization and H-RASv12 mutation) drives the formation of serially transplantable MLS. This is the first model of sarcoma based on the expression of a sarcoma-associated fusion protein in hMSC, and allowed us to unravel the differentiation processes and signaling pathways altered in the MLS-initiating cells. This study will contribute to test novel therapeutic approaches, and constitutes a proof-of-concept to employ hMSCs as target cell for modeling other fusion gene-associated human sarcomas. Wild type (MSC-0H) or transformed (MSC-5H) BM-hMSCs were transduced with concentrated viral particles expressing either pRRL-EF1?-PGK-GFP (empty vector; GFP) or pRRL-EF1?-FUS-CHOP-PGK-GFP (FUSCHOP expressing vector; FC) in order to generate MSC-0H-GFP, MSC-0H-FC, MSC-5H-GFP and MSC-5H-FC cell lines. MSC-0H-GFP and MSC-0H-FC cells did not develop tumors, meanwhile MSC-5H-GFP cells gave rise to undifferentiated sarcomas and MSC-5H-FC originated mixoid liposarcoma tumors when inoculated into immunedeficient mice. Several cell lines were derived from tumors developed from MSC-5H-GFP (T-5H-GFP-1 to -3 cell lines) and MSC-5H-FC (T-5H-FC-1 to -3 cell lines) cells. Gene expression analysis was performed using MSC-0H, MSC-5H and T-5H cell lines and lists of differentially expressed genes were created by comparing the gene expression profiles of MSC-0H-FC, MSC-5H-FC and T-5H-FC cell types to the control MSC-0H-GFP cells.

2013-06-18 | E-GEOD-48030 | biostudies-arrayexpress

Schizosaccharomyces pombe strain:972

Project description:Schizosaccharomyces pombe strain:972 Epigenomics

| PRJNA279551 | ENA

A species-specific nucleosomal signature defines a periodic distribution of amino acids in proteins

Project description:Sequencing of mononucleosomal DNA during asynchronous mitosis in Schizosaccharomyces pombe, Schizosaccharomyces octosporus, Schizosaccharomyces japonicus and Saccharomyces cerevisiae

2015-04-10 | GSE52170 | GEO

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