Expression in Saccharomyces cerevisiae of a gene associated with cytoplasmic male sterility from maize: respiratory dysfunction and uncoupling of yeast mitochondria.
We asked whether the mitochondrial T-urf13 gene, associated with the male sterility phenotype of T cytoplasm in maize, can be expressed in Saccharomyces cerevisiae and whether this expression can mimic the effects observed in maize. We introduced the universal code equivalent of the T-urf13 gene into the S. cerevisiae nucleus by transformation and directed its translation product into mitochondria by means of a fusion with the targeting presequence from Neurospora crassa AT-Pase subunit 9. We show that expression of the universal code equivalent of the T-urf13 gene in the yeast nucleus does indeed mimic its effects in maize: respiratory growth of yeast is inhibited, respiration-deficient cytoplasmic mutants accumulate and NADH oxidation of isolated mitochondria is uncoupled. All these effects are observed only if the mitochondrial targeting peptide and methomyl or HmT toxin are present.
Glab
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Centre de Génétique Moléculaire, Laboratoire propre du C.N.R.S. Université Pierre et Marie Curie, Gif sur Yvette, France.
Wise
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RP
Pring
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DR
Jacq
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C
Slonimski
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D002678:Chimera / Q000235:genetics; D003001:Cloning, Molecular; D003593:Cytoplasm; D015870:Gene Expression; D017343:Genes, Plant; D008724:Methomyl / Q000494:pharmacology; D008928:Mitochondria / Q000378:metabolism*; D009154:Mutation; D009183:Mycotoxins / Q000494:pharmacology; D010084:Oxidation-Reduction; D010101:Oxygen Consumption; D010641:Phenotype; D014176:Protein Biosynthesis; D012098:Reproduction / Q000235:genetics; D012441:Saccharomyces cerevisiae / Q000235:genetics* / Q000254:growth & development / Q000378:metabolism; D014170:Transformation, Genetic; D003313:Zea mays / Q000235:genetics*
D009183:Mycotoxins; D008724:Methomyl