title: Chemical genetic induction of meiosis in Schizosaccharomyces pombe.
abstract: In the fission yeast Schizosaccharomyces pombe, meiosis is inhibited by the protein kinase Pat1, which phosphorylates and inactivates Mei2, an RNA binding protein essential for the initiation of meiosis. When diploid cells are deprived of nutrients, they initiate a cascade of events leading to the inactivation of Pat1 and entry into meiosis. Strains carrying the temperature-sensitive pat1-114 allele are forced to enter into meiosis when shifted to the non-permissive temperature, independently of the ploidity of the cell. This system has been extensively used, since it is possible to achieve a highly synchronous meiosis, which is a must for any molecular or microscopic approach that aims to decipher the mechanisms governing meiosis. Here, we have designed a new system to obtain a similarly synchronous meiosis, but independently of temperature shifts. Thus, by introducing a mutation in the ATP pocket of Pat1, we have generated a protein kinase that, in the presence of small specific inhibitors, can be inactivated. This results in forced entry into meiosis without the need of a temperature shift, minimizing the introduction of heat shock or any other stress responses along the meiotic waves of transcription.
authors.affiliation: Oxidative Stress and Cell Cycle Group, Universitat Pompeu Fabra, Barcelona, Spain.
authors.forename: Angel
authors.initials: A
authors.lastname: Guerra-Moreno
authors.forename: Isabel
authors.initials: I
authors.lastname: Alves-Rodrigues
authors.forename: Elena
authors.initials: E
authors.lastname: Hidalgo
authors.forename: José
authors.initials: J
authors.lastname: Ayté
mesh_terms: D000255:Adenosine Triphosphate / Q000031:analogs & derivatives / Q000494:pharmacology*; D008540:Meiosis / Q000187:drug effects*; D009154:Mutation; D017346:Protein Serine-Threonine Kinases / Q000037:antagonists & inhibitors / Q000235:genetics / Q000378:metabolism; D012568:Schizosaccharomyces / Q000166:cytology* / Q000378:metabolism*; D029702:Schizosaccharomyces pombe Proteins / Q000037:antagonists & inhibitors / Q000235:genetics / Q000378:metabolism; D013696:Temperature
chemical_list: D029702:Schizosaccharomyces pombe Proteins; D000255:Adenosine Triphosphate; C087019:ran1 protein, S pombe; D017346:Protein Serine-Threonine Kinases