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. 1996 Dec;64(12):5269–5273. doi: 10.1128/iai.64.12.5269-5273.1996

Disruption of the SNF1 gene abolishes trehalose utilization in the pathogenic yeast Candida glabrata.

R Petter 1, K J Kwon-Chung 1
PMCID: PMC174518  PMID: 8945576

Abstract

The SNF1 gene product, a serine/threonine protein kinase, is a global regulatory protein which has been isolated from several organisms. In Saccharomyces cerevisiae the SNF1 gene product is essential for the derepression of glucose repression since snf1 strains are unable to utilize sucrose, galactose, maltose, melibiose, or nonfermentable carbohydrates. Moreover, the SNF1 gene product was suggested to interact with additional regulatory pathways and to affect the expression of multiple target genes as reflected by the pleiotropic nature of the snf1 mutation. Here we report the characterization of the SNF1 homolog of Candida glabrata, a pathogenic yeast phylogenetically related to S. cerevisiae. The carbon utilization spectrum of C. glabrata is considerably narrower than that of other pathogenic yeasts, and the majority of the strains utilize solely glucose and trehalose from among 20 of the most commonly tested carbohydrates. Disruption of the C. glabrata SNF1 homolog resulted in the loss of the ability to utilize trehalose, indicating that even in an organism with such a limited carbon utilization spectrum, the regulatory mechanism governing catabolic repression is preserved.

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Selected References

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