The nature of mutations affecting several cytochrome-deficient mutants of Debaryomyces (Schwanniomyces) occidentalis has been characterized. The DR12 mutant, which is deficient in cytochrome b, and the B10Mn mutant, which is deficient in cytochromes b and a, a3, are deleted in the mitochondrial CYB and COX1 genes respectively. The B10 strain, which is partially deficient in cytochrome b, has no detectable change in its mitochondrial DNA and possibly carries nuclear lesion(s). These three mutants, unlike the rho(-) and rho degrees "petite" mutants of Saccharomyces cerevisiae, can still grow on non-fermentable substrates, due to the development of a salicylhydroxamic acid (SHAM)-sensitive alternative pathway linked to phosphorylation at site 1. A gly(-) mutant lacking mtDNA and respiratory capacity has been isolated. For the first time, it is demonstrated that mtDNA can be altered or even lost without lethal consequence in D. occidentalis, although this yeast was classified as a petite-negative species.
|Evidence ID||Analyze ID||Interactor||Interactor Systematic Name||Interactor||Interactor Systematic Name||Type||Assay||Annotation||Action||Modification||Phenotype||Source||Reference||Note|
|Evidence ID||Analyze ID||Gene||Gene Systematic Name||Gene Ontology Term||Gene Ontology Term ID||Qualifier||Aspect||Method||Evidence||Source||Assigned On||Reference||Annotation Extension|
|Evidence ID||Analyze ID||Gene||Gene Systematic Name||Phenotype||Experiment Type||Experiment Type Category||Mutant Information||Strain Background||Chemical||Details||Reference|
|Evidence ID||Analyze ID||Regulator||Regulator Systematic Name||Target||Target Systematic Name||Experiment||Conditions||Strain||Source||Reference|