title: [Yeast resistance to polyene antibiotics. I. Production of Saccharomyces cerevisiae mutants resistant to nystatin and their genetic analysis].
abstract: 239 nistatin-resistant mutants were selected after UV-irradiation of yeasts. Phenotypical analysis has revealed two main groups of the mutants: 1) resistant to nistatin and resistant or sensitive (in different combinations) to haptaens; 2) resistant to nistatin and having an increased resistance to haptens. It is found that the sensitivity dominates over the resistance and hyper-resistance. Genetic analysis of the mutant collection has shown that the resistance to nistatin is determined by 5 nuclear genes (hysr). Hyper-resistance is controlled by mutations in other genes, which are not connected with stable phenotype. Genes of hyper-resistance can be considered as minus-modificators of pleiothrophic cross-resistance, characteristic of hysr genes. Plus-modificator genes of polyenic resistance are described. The gene hysr1 is linked with its chromosome.
mesh_terms: D003433:Crosses, Genetic; D004352:Drug Resistance, Microbial; D005796:Genes; D005838:Genotype; D009154:Mutation; D009761:Nystatin / Q000494:pharmacology*; D010641:Phenotype; D012441:Saccharomyces cerevisiae / Q000187:drug effects / Q000235:genetics* / Q000528:radiation effects; D014466:Ultraviolet Rays
chemical_list: D009761:Nystatin
vernacular_title: Rezistentnost' drozhzheĭ k polienovym antibiotikam. Soobshchenie I. Poluchenie mutantov Saccharomyces cerevisiae, rezistentnykh k nistatinu, i ikh geneticheskiĭ analiz.