Summary
A new mutation has been described which confers resistance to catabolite repression in Saccharomyces cerevisiae. The mutant allele, termed grr-1 for glucose repression-resistant, is characterized by insensitivity to glucose repression for the cytoplasmic enzymes invertase, maltase, and galactokinase, as well as the mitochondrial enzyme cytochrome c oxidase. Hexokinase levels in grr-1 mutants are approximately 3-fold higher than the corresponding activity of the parental strain. Although the grr-1 allele is expressed phenotypically similarly to the hex-1 (hxk-2) and hex-2 mutations described by Entian et al. (1977) and Zimmermann and Scheel (1977) respectively, we have shown genetically and physiologically that grr-1 represents a new class of mutation.
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Communicated by G.A. O'Donovan
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Bailey, R.B., Woodword, A. Isolation and characterization of a pleiotropic glucose repression resistant mutant of Saccharomyces cerevisiae . Molec. Gen. Genet. 193, 507–512 (1984). https://doi.org/10.1007/BF00382091
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DOI: https://doi.org/10.1007/BF00382091