Unknown,Transcriptomics,Genomics,Proteomics

Dataset Information

S. pombe acetyltransferase mutants identifies redundant pathways of gene regulation, dual-channel dataset

ABSTRACT: Analysis of histone acetyl transferases (HATs) from the MYST and GNAT families in S. pombe to identify functional differences or overlap with regard to gene expression. Mutations were made to Elp3 and Gcn5 (GNAT family), and to Mst2 (MYST family). Mutants showed distinct phenotypes which were repressed or enhanced by mutant combinations. Mutations were made to Gcn5 (GNAT family), and to Mst2 (MYST family) in S. pombe. A treatment of 1M KCl was applied for 60min to some samples. RNA was extracted from the various mutants and hybridized on Eurogentec arrays.

ORGANISM(S): Schizosaccharomyces pombe

SUBMITTER: Susan Forsburg

PROVIDER: E-GEOD-17259 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Expression profiling of S. pombe acetyltransferase mutants identifies redundant pathways of gene regulation.

Nugent Rebecca L RL Johnsson Anna A Fleharty Brian B Gogol Madelaine M Xue-Franzén Yongtao Y Seidel Chris C Wright Anthony Ph AP Forsburg Susan L SL

BMC genomics 20100122

<h4>Background</h4>Histone acetyltransferase enzymes (HATs) are implicated in regulation of transcription. HATs from different families may overlap in target and substrate specificity.<h4>Results</h4>We isolated the elp3+ gene encoding the histone acetyltransferase subunit of the Elongator complex in fission yeast and characterized the phenotype of an Deltaelp3 mutant. We examined genetic interactions between Deltaelp3 and two other HAT mutants, Deltamst2 and Deltagcn5 and used whole genome micr ...[more]

PMID: 20096118

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Project description:Fission yeast cells undergo sexual differentiation in response to nitrogen starvation. In this process haploid M and P cells first mate to form diploid zygotes, which subsequently enter meiosis and sporulate. Prior to mating, M cells secrete M-factor and P-cells secrete P-factor, and these diffusible mating pheromone can activate a signal transduction pathway in the opposite cell type. The pheromone response orchestrates mating and is also required for entry into meiosis. Here we use DNA microarrays to identify genes that are induced by M-factor in P cells and by P-factor in M-cells. The use of a cyr1 genetic background allowed us to study pheromone stimulation independently of nitrogen starvation. We identified a total of 163 genes that were consistently induced more than two-fold by pheromone stimulation. As expected, there was a substantial overlap between the genes induced by M- and P-factor. Surprisingly, we found that pheromone control extended to genes fulfilling their function well beyond the point of entry into meiosis, including numerous genes required for meiotic recombination. A direct comparison of the M- and P-factor induced expression pattern allowed us to identify cell-type specific transcripts, including three new M-specific genes and one new P-specific gene. Finally, our results support the notion that Ste11 is the key transcription factor activated by pheromone signalling. Keywords: dose response Gene expression profiling experiment in which gene expression in pheromone treated cultures was compared to that of untreated control cells. All cultures were growing exponentially in MSL minimal medium. S. pombe h+ cyr1- cells treated with M-factor mating pheromone for 2, 4 and 6 hrs respectively, were compared to non-treated cells. Similarly, S. pombe h- sax2- cyr1- cells treated with P-factor mating pheromone for 2, 4 and 6 hrs, were compared to non-treated cells. For identiofication of cell-type specific gene expression, h+ cyr1- cells were compaired to h+ sxa2- cyr1- cells. This was done both before pheromone treatment (0h/0h) and after 6 hours of pheromone treatment (6h/6h). RNA was extracted and subjected to cDNA expression profiling analysis using the established protocols (Xue et al, Yeast 21, 25-39, 2004).Data normalized with 'Lowess' per chip per spot normalization.

Dataset Information

S. pombe acetyltransferase mutants identifies redundant pathways of gene regulation, dual-channel dataset

Publications

Expression profiling of S. pombe acetyltransferase mutants identifies redundant pathways of gene regulation.

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