Reference: Montgomery DL, et al. (1982) The molecular characterization of three transcriptional mutations in the yeast iso-2-cytochrome c gene. J Biol Chem 257(13):7756-61

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Abstract


Three mutations, each of which causes overproduction of iso-2-cytochrome c, were characterized biochemically. Two, CYP3-4 and CYP3-15, were previously shown to be cis-dominant and map to the CYC7 locus which encodes the iso-2 protein, while the third, cyp1-16, maps to an unliked locus. All three mutations caused dramatically increased levels of transcription of the CYC7 gene, and the CYC7 mRNA in mutant cells was found to be the same size as that in wild type cells. The CYP3-4 mutation was found to be caused by the integration of a transposable element, Tyl, 269 base pairs 5' to the coding sequences. The CYP3-15 mutation was also found to alter the DNA, probably through a deletion or inversion with one endpoint 285 base pairs upstream from the coding sequence. The CYC7 gene in both wild type and mutant cells was not subject to catabolite repression.

Reference Type
Journal Article | Research Support, U.S. Gov't, Non-P.H.S. | Research Support, U.S. Gov't, P.H.S.
Authors
Montgomery DL, Boss JM, McAndrew SJ, Marr L, Walthall DA, Zitomer RS
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