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Nucleo-cytoplasmic interaction between oligomycin-resistant mutations in Saccharomyces cerevisiae
Molecular & General Genetics : MGG
|January 1, 1974
Summary
Mitochondrial mutations in yeast can alter how nuclear genes are expressed, revealing a novel nucleocytoplasmic interaction. This study shows mitochondrial DNA influences responses to specific inhibitors like venturicidin.
Area of Science:
- * Molecular and cellular biology
- * Yeast genetics and mitochondrial function
Background:
- * Investigating drug resistance and sensitivity in Saccharomyces cerevisiae.
- * Understanding the interplay between nuclear and cytoplasmic genetic elements.
Purpose of the Study:
- * To characterize a novel nucleocytoplasmic interaction in yeast.
- * To elucidate the role of mitochondrial genetics in drug response.
Main Methods:
- * Isolation and characterization of nuclear and cytoplasmic mutants resistant to oligomycin.
- * Analysis of drug cross-resistance and collateral sensitivity (venturicidin, Synthalin).
- * Mitotic segregation studies in diploid yeast strains.
Main Results:
- * Nuclear and cytoplasmic mutants displayed distinct resistance/sensitivity profiles to mitochondrial inhibitors.
- * A novel suppression of nuclear-controlled venturicidin resistance by a cytoplasmic mutation was observed.
- * Mitochondrial genome influences in vivo responses to venturicidin and Synthalin.
Conclusions:
- * A unique nucleocytoplasmic interaction modifies nuclear gene expression based on mitochondrial genotype.
- * This study provides the first example of a mitochondrial mutation altering nuclear gene phenotypic expression.