Saccharomyces cerevisiae
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ABSTRACT:
PROVIDER: PRJNA154463 | ENA |
REPOSITORIES: ENA
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Project description:This SuperSeries is composed of the following subset Series: GSE32550: A conserved transcriptional regulator governs fungal morphology in widely diverged species [expression data] GSE32557: A conserved transcriptional regulator governs fungal morphology in widely diverged species [ChIP-chip, Transcriptional regulation by Mit1 and orthologs] Refer to individual Series
2011-10-03 | E-GEOD-32558 | biostudies-arrayexpress
Project description:A conserved transcriptional regulator governs fungal morphology in widely diverged species [expression data]
| PRJNA154461 | ENA
Project description:Colletotrichum gloeosporioides, a widely distributed economically important agent in postharvest fruit disease thrives by massive secretion of ammonia to alkalize its environment and activate its pathogenicity genes. We sequenced the C. gloeosporioides transcriptomes of WT and a M-bM-^HM-^FpacC mutant, a major gene regulator under changing pH, under pH 7.0 in order to examine pacC regulation. Transcriptome analysis of the M-bM-^HM-^FpacC strain showed that 468 and 458 genes were up or down regulated, respectively. Both the up and down regulated genes were clustered into similar functions including: transporters to maintain cellular homeostasis, cell wall degrading enzymes to optimize pathogenicity and GATA-like transcription factors. Suggesting that activation of pacC under alkaline condition regulates genes expression to fit their optimal PKa. The transcript level predictions were verified by growth in different pH and fruit infection. Further analyses showed pacC binding sites were over-represented in the promoters of the pacC up-regulated genes but not in the promoters of the down-regulated genes, where instead, GATA-like binding sites were prominent. Evolutionary conservation of pacC control was sought by examining the gene orthologs in 5 fungal genomes whose members display contrasting alkaline or acidifying pathogenicity strategies. The results showed that irrespective of pathogen colonization strategy, only orthologs of up-regulated genes showed over-representation of pacC binding sites. Significantly, the down regulated orthologs revealed cross-genome over-representation of GATA transcription factor binding sites. Thus, pacC is a phylogenetically conserved fungal mechanism exerting dual pH control for maintaining homeostasis and pathogenicity in changing environments. Examination of C. gloeosporioides WT and a M-bM-^HM-^FpacC mutant grown under pH 7.0
2013-11-21 | E-GEOD-41844 | biostudies-arrayexpress
Project description:In this paper, we examine orthologs of a transcriptional regulator in three fungal species, Saccharomyces cerevisiae, Candida albicans, and Histoplasma capsulatum. We show that, despite an estimated 600 million years since those species diverged from a common ancestor, Wor1 in C. albicans, Ryp1 in H. capsulatum, and Mit1 in S. cerevisiae recognize the same DNA motif. Previous work established that Wor1 regulates white-opaque switching in C. albicans and that its ortholog Ryp1 regulates the yeast to mycelial transition in H. capsulatum. Here we show that the ortholog Mit1 in S. cerevisiae also regulates a morphological transition, in this case pseudohyphal growth. Full genome chromatin immunoprecipitation experiments show that Mit1 binds to the control regions of approximately 94 genes including the previously known regulators of pseudohyphal growth. Through a comparison of full genome chromatin immunoprecipitation experiments for Mit1 in S. cerevisiae, Wor1 in C. albicans, and Wor1 ectopically expressed in S. cerevisiae, we conclude that genes controlled by the orthologous regulators overlap only slightly between these two species. We suggest that the ancestral Wor1/Mit1/Ryp1 protein controlled aspects of cell morphology and that evolutionary movement of genes in and out of the Wor1/Mit1/Ryp1 regulon is responsible, in part, for the differences of morphological forms among these species. Consistent with this idea, ectopic expression of C. albicans Wor1 or H. capsulatum Ryp1 can drive the pseudohyphal growth program in S. cerevisiae. IP strains were compared to untagged or deletion control strains
2011-10-03 | E-GEOD-32557 | biostudies-arrayexpress
Project description:In this paper, we examine orthologs of a transcriptional regulator in three fungal species, Saccharomyces cerevisiae, Candida albicans, and Histoplasma capsulatum. We show that, despite an estimated 600 million years since those species diverged from a common ancestor, Wor1 in C. albicans, Ryp1 in H. capsulatum, and Mit1 in S. cerevisiae recognize the same DNA motif. Previous work established that Wor1 regulates white-opaque switching in C. albicans and that its ortholog Ryp1 regulates the yeast to mycelial transition in H. capsulatum. Here we show that the ortholog Mit1 in S. cerevisiae also regulates a morphological transition, in this case pseudohyphal growth. Full genome chromatin immunoprecipitation experiments show that Mit1 binds to the control regions of approximately 94 genes including the previously known regulators of pseudohyphal growth. Through a comparison of full genome chromatin immunoprecipitation experiments for Mit1 in S. cerevisiae, Wor1 in C. albicans, and Wor1 ectopically expressed in S. cerevisiae, we conclude that genes controlled by the orthologous regulators overlap only slightly between these two species. We suggest that the ancestral Wor1/Mit1/Ryp1 protein controlled aspects of cell morphology and that evolutionary movement of genes in and out of the Wor1/Mit1/Ryp1 regulon is responsible, in part, for the differences of morphological forms among these species. Consistent with this idea, ectopic expression of C. albicans Wor1 or H. capsulatum Ryp1 can drive the pseudohyphal growth program in S. cerevisiae. Replicate experiments for each of four strains compared with reference sample - WT, a Mit1 deletion haploid A strain, a Yhr177w deletion haploid A strain, and a double deletion haploid A strain. All were in the sigma 2000 background.
2011-10-03 | E-GEOD-32550 | biostudies-arrayexpress
Project description:Gene regulation in response to intracellular calcium is mediated by the calcineurin-activated transcription factor Prz1 in the fission yeast Schizosaccharomyces pombe. Genome-wide studies of the Crz1 and CrzA fungal orthologs have uncovered numerous target genes involved in conserved and species-specific cellular processes. In contrast, very few target genes of Prz1 have been published. This paper identified an extensive list of genes using transcriptome and ChIP-chip analyses under inducing conditions of Prz1, including CaCl2, and tunicamycin treatment, as well as a â??pmr1 genetic background. We identified 165 upregulated putative target genes of Prz1 in which the majority contained a calcium-dependent response element in their promoters, similar to that of the Saccharomyces cerevisiae ortholog Crz1. These genes were functionally enriched for Crz1-conserved processes such as cell wall biosynthesis. Overexpression of prz1+ increased resistance to the cell wall degradation enzyme zymolyase, likely from upregulation of the O-mannosyltransferase encoding gene omh1+. Loss of omh1+ abrogates this phenotype. We uncovered a novel inhibitory role in flocculation for Prz1. Loss of prz1+ resulted in constitutive flocculation and upregulation of genes encoding the flocculins Gsf2 and Pfl3, as well as the transcription factor Cbf12. The constitutive flocculation of the â??prz1 strain was abrogated by the loss of gsf2+ or cbf12+. This study reveals that Prz1 functions as a positive and negative transcriptional regulator of genes involved in cell wall biosynthesis and flocculation, respectively. Moreover, comparison of target genes between Crz1/CrzA and Prz1 indicate some conservation in DNA-binding specificity, but also substantial rewiring of the calcineurin-mediated transcriptional-regulatory network. We generated 2 ChIP-chip experiments, each with a biological replicate performed as a dye swap.
2016-02-10 | E-GEOD-77760 | biostudies-arrayexpress
Project description:Colletotrichum gloeosporioides, a widely distributed economically important agent in postharvest fruit disease thrives by massive secretion of ammonia to alkalize its environment and activate its pathogenicity genes. We sequenced the C. gloeosporioides transcriptomes of WT and a ∆pacC mutant, a major gene regulator under changing pH, under pH 7.0 in order to examine pacC regulation. Transcriptome analysis of the ∆pacC strain showed that 468 and 458 genes were up or down regulated, respectively. Both the up and down regulated genes were clustered into similar functions including: transporters to maintain cellular homeostasis, cell wall degrading enzymes to optimize pathogenicity and GATA-like transcription factors. Suggesting that activation of pacC under alkaline condition regulates genes expression to fit their optimal PKa. The transcript level predictions were verified by growth in different pH and fruit infection. Further analyses showed pacC binding sites were over-represented in the promoters of the pacC up-regulated genes but not in the promoters of the down-regulated genes, where instead, GATA-like binding sites were prominent. Evolutionary conservation of pacC control was sought by examining the gene orthologs in 5 fungal genomes whose members display contrasting alkaline or acidifying pathogenicity strategies. The results showed that irrespective of pathogen colonization strategy, only orthologs of up-regulated genes showed over-representation of pacC binding sites. Significantly, the down regulated orthologs revealed cross-genome over-representation of GATA transcription factor binding sites. Thus, pacC is a phylogenetically conserved fungal mechanism exerting dual pH control for maintaining homeostasis and pathogenicity in changing environments.
2013-11-21 | GSE41844 | GEO
Project description:We have focused our investigation on the characterization of the role of the fungal specific SWI/SNF subunit, Snf6. Our data show that, although the C. albicans subunit has only limited sequence similarity to other fungal orthologs, Snf6 was copurified with SWI/SNF complex subunits including the catalytic ATPase subunit, Snf2. We show that Snf6 plays a critical role in biological processes that are essential for fungal pathogenesis including carbon metabolic flexibility, stress response and morphogenesis. The Snf6 regulon was determined by combining both genome-wide location (ChIP-chip) and transcriptional profiling (microarrays) to identify targets of the SWI/SNF complex under both yeast- and hyphal-promoting conditions.
2017-10-28 | GSE106278 | GEO
Project description:D. yakuba, D. simulans, and D. sechellia gDNA competitively hybridized against D. melanogaster to evaluate aCGH as a means to identify diverged orthologs.
2009-10-07 | GSE18416 | GEO