FOG1 and FOG2 genes, required for the transcriptional activation of glucose-repressible genes of Kluyveromyces lactis, are homologous to GAL83 and SNF1 of Saccharomyces cerevisiae
1996
Goffrini, P. | Ficarelli, A. | Donnini, C. | Lodi, T. | Puglisi, P.P. | Ferrero, I.
The fog1 and fog2 mutants of the yeast Kluyveromyces lactis were identified by inability to grow on a number of both fermentable and non-fermentable carbon sources. Genetic and physiological evidences suggest a role for FOG1 and FOG2 in the regulation of glucose-repressible gene expression in response to a glucose limitation. The regulatory effect appears to be at the transcriptional level, at least for beta-galactosidase. Both genes have been cloned by complementation and sequenced. FOG1 is a unique gene homologous to GAL83, SIP1 and SIP2, a family of regulatory genes affecting glucose repression of the GAL system in Saccharomyces cerevisiae. However, major differences exist between fog1 and gal83 mutants. FOG2 is structurally and functionally homologous to SNF1 of S. cerevisiae and shares with SNF1 a role also in sporulation.
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