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Yeast. 1996 Feb;12(2):115-27.

Structure and regulation of the Candida albicans ADH1 gene encoding an immunogenic alcohol dehydrogenase.

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1
University of Aberdeen, Marischal College, U.K.

Abstract

The Candida albicans ADH1 gene encodes an alcohol dehydrogenase which is immunogenic during infections in humans. The ADH1 gene was isolated and sequenced, and the 5'- and 3'-ends of its mRNA were mapped. The gene encodes a 350 amino acid polypeptide with strong homology (70.5-85.2% identity) to alcohol dehydrogenases from Saccharomyces cerevisiae, Kluyveromyces lactis and Schizosaccharomyces pombe. The cloned C. albicans ADH1 gene was shown to be functional through complementation of adh mutations and efficient production of active alcohol dehydrogenase in S. cerevisiae. Northern analysis of C. albicans RNA revealed that ADH1 mRNA levels were regulated in response to carbon source and during batch growth. During growth on glucose, ADH1 mRNA levels rose to maximum levels during late exponential growth phase and declined to low levels in stationary phase. The ADH1 mRNA was relatively abundant during growth on galactose, glycerol, pyruvate, lactate or succinate, and less abundant during growth on glucose or ethanol. Alcohol dehydrogenase levels did not correlate closely with ADH1 mRNA levels under the growth conditions studied, suggesting either that this locus is controlled at both transcriptional and post-transcriptional levels, or that other differentially regulated ADH loci exist in C. albicans.

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