Reference: Bonitz SG, et al. (1980) Assembly of the mitochondrial membrane system. Physical map of the Oxi3 locus of yeast mitochondrial DNA. J Biol Chem 255(24):11922-6

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Abstract


The oxi3 locus of yeast mitochondrial DNA is currently thought to code for Subunit 1 of cytochrome oxidase (Tzagoloff, A., Macino, G., and Sebald, W. (1979) Annu. Rev. Biochem. 48, 419-441). The respiratory competent strain of Saccharomyces cerevisiae D273-10B/A48 was used to obtain cytoplasmic "petite" clones enriched for genetic markers in the oci3 locus. The most complex clone studied (DS6) was ascertained to have a mitochondrial genome with a tandemly repeated segment of mtDNA 16.5 kilobases in length. The oxi3 locus was dissected by mutagenesis of DS6 with ethidium bromide and selection of new clones having less complex genotypes. Six derivative clones with genome sizes ranging from 2.3 to 6.1 kilobases have been extensively analyzed. Most of the restriction sites present in the segments of mtDNA retained by the clones have been mapped, thereby providing a detailed restriction map of the oxi3 gene. Based on the physical locations of the most distal oxi3 mutations, the gene spans approximately 10,000 nucleotides and occupies the region of wild type mtDNA from 44 to 58 map units.

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Journal Article | Research Support, U.S. Gov't, P.H.S.
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Bonitz SG, Coruzzi G, Thalenfeld BE, Tzagoloff A, Macino G
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