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Kar4 acts as a Ste12 regulator in Saccharomyces cerevisiae, promoting Ste12 binding to a specific DNA motif genome-wide [ChIP-exo]

ABSTRACT: Kar4 is a putative transcription factor essential for mating in the budding yeast Saccharomyces cerevisiae. Kar4 has been shown to function with Ste12, the master transcriptional regulator of the yeast mating pheromone response, to promote the transcription of a subset of Ste12 targets required for efficient mating. However, the mechanism by which Kar4 modulates Ste12 activity has remained uncertain. Here, we examine the effect of Kar4 on the mating pheromone response via ChIP-exo

ORGANISM(S): Saccharomyces cerevisiae

PROVIDER: GSE306667 | GEO | 2025/12/08

REPOSITORIES: GEO

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Kar4 acts as a Ste12 regulator in Saccharomyces cerevisiae, promoting Ste12 binding to a specific DNA motif genome-wide [RNA-seq]

Project description:Kar4 is a putative transcription factor essential for mating in the budding yeast Saccharomyces cerevisiae. Kar4 has been shown to function with Ste12, the master transcriptional regulator of the yeast mating pheromone response, to promote the transcription of a subset of Ste12 targets required for efficient mating. However, the mechanism by which Kar4 modulates Ste12 activity has remained uncertain. Here, we examine the effect of Kar4 on the mating pheromone response at the levels of transcription (RNA-seq)

2025-12-08 | GSE306669 | GEO

Kar4 acts as a Ste12 regulator in Saccharomyces cerevisiae, promoting Ste12 binding to a specific DNA motif genome-wide [ChIP-exo]

Project description:Kar4 acts as a Ste12 regulator in Saccharomyces cerevisiae, promoting Ste12 binding to a specific DNA motif genome-wide [ChIP-exo]

| PRJNA1311605 | ENA

Binding and regulation of transcription by yeast Ste12 variants to drive mating and invasion phenotypes

Project description:Here, we examine how six single amino acid variants in the DNA-binding domain of Ste12 – a yeast transcription factor regulating mating and invasion – alter Ste12 genome binding, motif recognition and gene expression to yield markedly different phenotypes. Using a combination of the calling card method, RNA sequencing , we find that variants with dissimilar binding and expression profiles can converge onto similar cellular behaviors.

2020-01-30 | GSE141713 | GEO

Kar4 acts as a Ste12 regulator in Saccharomyces cerevisiae, promoting Ste12 binding to a specific DNA motif genome-wide

Project description:Kar4 acts as a Ste12 regulator in Saccharomyces cerevisiae, promoting Ste12 binding to a specific DNA motif genome-wide

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Genome-wide Ste12-binding site mapping in MATa segregants of YJM789 x S96 cross

Project description:In this study, we mapped for the first time differences in transcription binding among individuals and elucidated the genetic basis of such variation. Whole-genome Ste12 binding profiles were determined using ChIP-Seq in pheromone-treated cells of 43 segregants of a cross between two highly diverged yeast strains, YJM789 and S288c as well as the parental lines. We identified extensive Ste12 binding variation among individuals and mapped underlying cis- and trans- acting loci responsible for such variation. We showed that the majority of TF binding variation is cis-linked and that many variations are associated with polymorphisms residing in the binding motifs of Ste12 as well as those of several known and proposed Ste12 cofactors. We also identified two trans factors, AMN1 and FLO8, that modulate Ste12 binding to promoters of more than 10 genes under α-factor treatment. Neither of these two genes was known to regulate Ste12 previously, and we suggest that they may be key mediators of gene activity and phenotypic diversity. Ste12 binding strongly correlates with gene expression for more than 200 genes indicating that binding variation is functional. Many of the variable bound genes are involved in cell wall organization and biogenesis. Overall, we identified key regulators of molecular diversity among individuals and provide novel insights into mechanisms of gene regulation.

2010-02-18 | GSE19635 | GEO

K. lactis Ste12-myc ChIP-Seq in pheromone-responding a cells

Project description:The purpose of this experiment was to determine the genes directly regulated by Ste12 in K. lactis. The experiment was performed in a cells to determine if the a-specific genes were bound by Ste12. Ste12 was tagged with c-myc and was immunoprecipitated with a c-myc antibody. Cells were starved in SD media lacking phosphate for 2 hours, then treated with 10µg/mL K. lactis alpha factor for 2 hours before harvesting. A control untagged strain was processed in parallel. The experiment was repeated 3 times, and sequenced on an Illumina HiSeq 2500. K. lactis Ste12-myc vs. untagged control under pheromone response condition with 3 technical replicates done on different days

2015-07-06 | E-GEOD-65792 | biostudies-arrayexpress

Houser2012_pheromone_Ste12

Project description:This model is from the article: Positive roles for negative regulators in the mating response of yeast. Houser JR, Ford E, Nagiec MJ, Errede B, Elston TC. Mol Syst Biol 2012 June 5;8:586 22669614 , Abstract: All cells must detect and respond to changes in their environment, often through changes in gene expression. The yeast pheromone pathway has been extensively characterized, and is an ideal system for studying transcriptional regulation. Here we combine computational and experimental approaches to study transcriptional regulation mediated by Ste12, the key transcription factor in the pheromone response. Our mathematical model is able to explain multiple counterintuitive experimental results and led to several novel findings. First, we found that the transcriptional repressors Dig1 and Dig2 positively affect transcription by stabilizing Ste12. This stabilization through protein-protein interactions creates a large pool of Ste12 that is rapidly activated following pheromone stimulation. Second, we found that protein degradation follows saturating kinetics, explaining the long half-life of Ste12 in mutants expressing elevated amounts of Ste12. Finally, our model reveals a novel mechanism for robust perfect adaptation through protein-protein interactions that enhance complex stability. This mechanism allows the transcriptional response to act on a shorter time scale than upstream pathway activity.

2005-01-01 | MODEL1204040000 | BioModels

Genome-wide Ste12-binding site mapping in MATa segregants of YJM789 x S96 cross

Project description:In this study, we mapped for the first time differences in transcription binding among individuals and elucidated the genetic basis of such variation. Whole-genome Ste12 binding profiles were determined using ChIP-Seq in pheromone-treated cells of 43 segregants of a cross between two highly diverged yeast strains, YJM789 and S288c as well as the parental lines. We identified extensive Ste12 binding variation among individuals and mapped underlying cis- and trans- acting loci responsible for such variation. We showed that the majority of TF binding variation is cis-linked and that many variations are associated with polymorphisms residing in the binding motifs of Ste12 as well as those of several known and proposed Ste12 cofactors. We also identified two trans factors, AMN1 and FLO8, that modulate Ste12 binding to promoters of more than 10 genes under Î±-factor treatment. Neither of these two genes was known to regulate Ste12 previously, and we suggest that they may be key mediators of gene activity and phenotypic diversity. Ste12 binding strongly correlates with gene expression for more than 200 genes indicating that binding variation is functional. Many of the variable bound genes are involved in cell wall organization and biogenesis. Overall, we identified key regulators of molecular diversity among individuals and provide novel insights into mechanisms of gene regulation. Two ChIP-Seq experiments and one Input DNA-Seq experiment for the yeast strains S96, HS959 and 43 MATa segregants were performed under alpha factor treatment conditions; an additional replicate was also performed for some of the strains. One ChIP-Seq experiment for each parental strain was performed without alpha factor treatment, and one ChIP-Seq experiment for each of the 24 deletion strains was performed under alpha factor treatment.

2010-02-18 | E-GEOD-19635 | biostudies-arrayexpress

Kar4 acts as a Ste12 regulator in Saccharomyces cerevisiae, promoting Ste12 binding to a specific DNA motif genome-wide [RNA-seq]

Project description:Kar4 acts as a Ste12 regulator in Saccharomyces cerevisiae, promoting Ste12 binding to a specific DNA motif genome-wide [RNA-seq]

| PRJNA1311606 | ENA

Control of expression noise, fitness and gene aggregation by a component of the yeast pheromone response pathway

Project description:Cellular processes are subject to variability, or noise, yet mechanisms that promote cell-to-cell uniformity are poorly understood. We have identified such a role for Dig1, a redundant (with Dig2) MAPK-responsive inhibitor of the S. cerevisiae mating pathway transcription factor Ste12. Cells lacking Dig1, but not Dig2, exhibited increased variability in outputs of the mating pathway. dig1∆ mutants also displayed a Ste12-dependent defect in growth in the absence of mating pheromone and a quantitative defect in the process of mating, itself. In cells expressing two reporter genes driven by the same promoter, both intrinsic/uncorrelated and extrinsic/correlated noise were found to increase. Remarkably, the extrinsic noise phenotype in cells lacking Dig1 correlates with the aggregation of target genes: we observed subnuclear foci of Ste12 specifically in dig1∆ cells and, using a newly-developed method to immunoprecipitate a single locus from crosslinked chromatin, we found that Dig1 inhibits long-range interactions between Ste12 target genes in vivo. Dig1 may shield binding surfaces on Ste12 whose unmasking leads to inappropriate gene associations and increased gene expression noise. These studies reveal how investigations of variability modulation mechanisms can yield unexpected biological insights.

2010-12-15 | GSE17583 | GEO

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