Saccharomyces cerevisiae
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ABSTRACT:
PROVIDER: PRJNA102443 | ENA |
REPOSITORIES: ENA
Similar Datasets
Project description:We examined the mating response of W303 bar1delta a-type cells to six alpha-factor concentrations (0.06, 0.2, 0.6, 6, 60 and 600 nM). In each alpha factor concentration between five to seven time points were collected. The time points in all experiments (except for concentration 600 nM were time point 15 min was omitted) were 5, 15, 30, 60, and 90 min. In some of the concentrations also time points 120 and 150 min were considered. The expression of cells before and after addition of alpha-factor were compared using S. cerevisiae cDNA microarrays, in all experiments the same sample before adding alpha factor was used as a control. Keywords: yeast mating response, comparison among alpha factor concentrations
2007-09-11 | GSE8982 | GEO
Project description:Haploid budding yeast has two mating types, defined by the alleles of the MAT locus, MATa and MATM-NM-1. Mating occurs when two haploid cells of opposite mating types signal to each other using reciprocal pheromones and receptors, polarize and grow towards each other, and eventually fuse to form a single diploid cell. The pheromones and receptors are necessary and sufficient to define a mating type, but other mating type-specific proteins make mating more efficient. We examined the role of these proteins by genetically engineering M-bM-^@M-^\transvestiteM-bM-^@M-^] cells that swap the pheromone, pheromone receptor, and pheromone processing factors of one mating type for another. These cells can mate with each other, but their mating is inefficient. By characterizing their mating defects and examining their transcriptomes, we found Afb1 (a-factor barrier), a novel MATM-NM-1-specific protein that interferes with a-factor, the pheromone secreted by MATa cells. We show that strong pheromone secretion is essential for efficient mating and that the weak mating of transvestites can be improved by boosting their pheromone production. Using synthetic biology, it is possible to characterize the factors that control efficiency in biological processes. In the case of budding yeast mating, selection for increased mating efficiency is likely to have continually boosted pheromone levels and the ability to discriminate between partners who make more (potentially fitter) and less (potentially less fit) pheromones. This sensitivity to which partner makes more pheromone comes at a cost: it means mating is not robust in situations where all potential partners make less pheromone. 4 conditions were analysed, each with 3 biological replicates. The conditions were unstimulated MATa cells in YPD. Stimulated MATa cells in YPD+10nM M-NM-1-factor. Unstimulated MATM-NM-1 cells in YPD. Stimulated MATM-NM-1 cells in YPD+10nM M-NM-1-factor.
2014-01-07 | E-GEOD-49372 | biostudies-arrayexpress
Project description:We measured the response of S. cerevisiae to arrest in the presence of alpha factor. These were collected in support of a related DNaseI-sequencing study. Keywords: Alpha-factor arrest S.cerevisiae R276 (MATa ura3Δ0 leu2Δ0 his3Δ1 met15Δ0 bar1Δ::KanMX) (C. Boone, University of Toronto; S288c background derived from BY4741), was cultured overnight in 50 ml rich medium (YPD) at 30°C, diluted into 500 ml fresh YPD to an OD660 of ~0.8, and treated with yeast α-factor (Sigma-Aldrich) at a final concentration of 50 ng / ml. This culture was incubated at 30°C with shaking for 3 hours (final OD660 ~1). After this treatment, approximately 90% of the cells had formed mating projections when checked by light microscopy. Total RNA from these cells was isolated using hot acidic phenol. 50 μg of total RNA was treated with Turbo Dnase (Ambion), and checked for integrity using a Bioanalyzer 2100 (Agilent). Total RNA was labeled according to the manufacturer’s protocol and applied to Affymetrix Yeast 2.0 arrays. Data were analyzed using the “affy” package from Bioconductor.
2008-12-01 | E-GEOD-11412 | biostudies-arrayexpress
Project description:Haploid budding yeast has two mating types, defined by the alleles of the MAT locus, MATa and MATα. Mating occurs when two haploid cells of opposite mating types signal to each other using reciprocal pheromones and receptors, polarize and grow towards each other, and eventually fuse to form a single diploid cell. The pheromones and receptors are necessary and sufficient to define a mating type, but other mating type-specific proteins make mating more efficient. We examined the role of these proteins by genetically engineering “transvestite” cells that swap the pheromone, pheromone receptor, and pheromone processing factors of one mating type for another. These cells can mate with each other, but their mating is inefficient. By characterizing their mating defects and examining their transcriptomes, we found Afb1 (a-factor barrier), a novel MATα-specific protein that interferes with a-factor, the pheromone secreted by MATa cells. We show that strong pheromone secretion is essential for efficient mating and that the weak mating of transvestites can be improved by boosting their pheromone production. Using synthetic biology, it is possible to characterize the factors that control efficiency in biological processes. In the case of budding yeast mating, selection for increased mating efficiency is likely to have continually boosted pheromone levels and the ability to discriminate between partners who make more (potentially fitter) and less (potentially less fit) pheromones. This sensitivity to which partner makes more pheromone comes at a cost: it means mating is not robust in situations where all potential partners make less pheromone.
2014-01-07 | GSE49372 | GEO
Project description:0.2 mM As(III) stressed met4 deletion mutant vs 0.2 mM As(III) stressed wild-type after 1 hour
| PRJNA104447 | ENA
Project description:0.2 mM As(III) stressed yap1 deletion mutant vs 0.2 mM As(III) stressed wild-type after 1 hour
| PRJNA104443 | ENA
Project description:The regulation of cell cycle progression in response to environmental cues is essential for cellular adaptation. In Saccharomyces cerevisiae, the BAR1 gene modulates sensitivity to the mating pheromone α-factor, which induces cell cycle arrest. Here we investigated the dynamic proteomic response in the bar1 deletion strain using a 27-plex experimental design with TMTproD isobaric labeling. Asynchronous bar1Δ cells were arrested with α-factor and then released from the pheromone arrest. We acquired three replicate protein abundance time-course profiles following pheromone (α-factor) washout, with samples collected at eight time points from 0 to 165 minutes post-washout. Using higher-order TMTpro sample multiplexing, we generated global temporal profiles of protein abundance associated with recovery from pheromone-induced arrest. Our findings identify specific proteins and pathways involved in cell cycle re-entry and in the attenuation of the pheromone signal, providing insights into the regulatory mechanisms of mating response in yeast. This study contributes significantly to dynamic proteomic analysis in cell cycle progression. We present a powerful approach for investigating complex cellular processes and showcase cell cycle progression following pheromone washout in yeast.
2025-11-24 | PXD059092 | Pride
Project description:The Tup1-Cyc8 corepressor complex of Saccharomyces cerevisiae is recruited to promoters by DNA-binding proteins to repress transcription of genes, including the a-specific mating type genes. We report here a tup1(S649F) mutant that displays mating irregularities similar to a tup1 null and an a-predominant growth defect. RNA-Seq and ChIP-Seq were used to analyze gene expression and Tup1 binding changes in mutant vs. wild-type in both a and a cells. Increased Tup1(S649F) binding tended to occur upstream of upregulated genes, whereas locations with decreased binding usually did not show changes in gene expression, suggesting this mutant not only loses corepressor function but also behaves as a coactivator. Based upon studies demonstrating a dual role of Tup1 in both repression and activation, we postulate that the coactivator function of Tup1(S649F) results from diminished interaction with repressor proteins, including a2. We also found that large changes in mating type-specific gene expression between a and a or between mutant and wild-type were not easily explained by the range of Tup1 binding levels within their promoters, as predicted by the classic model of a-specific gene repression by Tup1. Most surprisingly, we observed Tup1 binding upstream of the a-specific gene MFA2 and the a-specific gene MF(ALPHA)1 in cells in which each gene was expressed rather than repressed. These results, combined with identification of additional mating related genes upregulated in the tup1(S649F) a strain, illustrate that the role of Tup1 in distinguishing mating types in yeast appears to be both more comprehensive and more nuanced than previously appreciated.
2021-09-01 | GSE173720 | GEO
Project description:The Tup1-Cyc8 corepressor complex of Saccharomyces cerevisiae is recruited to promoters by DNA-binding proteins to repress transcription of genes, including the a-specific mating type genes. We report here a tup1(S649F) mutant that displays mating irregularities similar to a tup1 null and an a-predominant growth defect. RNA-Seq and ChIP-Seq were used to analyze gene expression and Tup1 binding changes in mutant vs. wild-type in both a and a cells. Increased Tup1(S649F) binding tended to occur upstream of upregulated genes, whereas locations with decreased binding usually did not show changes in gene expression, suggesting this mutant not only loses corepressor function but also behaves as a coactivator. Based upon studies demonstrating a dual role of Tup1 in both repression and activation, we postulate that the coactivator function of Tup1(S649F) results from diminished interaction with repressor proteins, including a2. We also found that large changes in mating type-specific gene expression between a and a or between mutant and wild-type were not easily explained by the range of Tup1 binding levels within their promoters, as predicted by the classic model of a-specific gene repression by Tup1. Most surprisingly, we observed Tup1 binding upstream of the a-specific gene MFA2 and the a-specific gene MF(ALPHA)1 in cells in which each gene was expressed rather than repressed. These results, combined with identification of additional mating related genes upregulated in the tup1(S649F) a strain, illustrate that the role of Tup1 in distinguishing mating types in yeast appears to be both more comprehensive and more nuanced than previously appreciated.
2021-09-01 | GSE173721 | GEO