Reference: Tron T, et al. (1991) Molecular analysis of revertants from a respiratory-deficient mutant affecting the center o domain of cytochrome b in Saccharomyces cerevisiae. FEBS Lett 278(1):26-30

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Abstract


In bc complexes, cytochrome b plays a major role in electron transfer and in proton translocation across the membrane. Several inhibitor-resistant and respiratory-deficient mutants have already been used to study the structure-function relationships of this integral membrane protein. We describe here the selection and the molecular analysis of revertants from a thermo-sensitive mit-mutant of known nucleotide changes. Among 80 independent pseudo-wild type revertants screened by DNA-labelled oligonucleotide hybridization, 33 have been sequenced. Eight suppressor mutations, affecting a region critical for both the function and the binding of center o inhibitors (end of helix C) were identified. Two of them were found to be more resistant to myxothiazol.

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Journal Article | Research Support, Non-U.S. Gov't
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Tron T, Infossi P, Coppee JY, Colson AM
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