Reference: Inglis SC, et al. (1991) Analysis of the invariant Phe82 residue of yeast iso-1-cytochrome c by site-directed mutagenesis using a phagemid yeast shuttle vector. Protein Eng 4(5):569-74

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Abstract


A phagemid (pING4) carrying the yeast iso-1-cytochrome c gene was constructed which bears all the elements necessary for replication in yeast and bacteria and may be converted into a single-stranded form of DNA for site-directed mutagenesis and nucleotide sequencing. The recombinant vector was used to create a complete set of 19 amino acid changes at position 82, a phylogenetically conserved phenylalanine residue in mitochondrial cytochrome c. All the different forms of cytochrome c were functional in vivo, based upon their ability to support respiration when the mutant proteins were expressed in a yeast strain (otherwise devoid of cytochrome c) grown on non-fermentable carbon sources, with only the strain containing the Cys82 variant having a substantially decreased growth rate. These results are interpreted in terms of the available structural and functional information previously reported on a subset of cytochrome c proteins with mutations at position 82.

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Journal Article | Research Support, Non-U.S. Gov't
Authors
Inglis SC, Guillemette JG, Johnson JA, Smith M
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