Reference: Passoth V, et al. (1998) Molecular cloning of alcohol dehydrogenase genes of the yeast Pichia stipitis and identification of the fermentative ADH. Yeast 14(14):1311-25

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Abstract


Two Pichia stipitis ADH genes (PsADH1 and PsADH2) were isolated by complementation of a Saccharomyces cerevisiae Adh(-)-mutant. The genes enabled the transformants to grow in the presence of antimycin A on glucose, to use ethanol as sole carbon source and made them sensitive to allylalcohol. The sequences of the genes showed similarities of 70-77% to sequences of ADH genes of Candida albicans, Kluyveromyces lactis, K. marxianus, and S. cerevisiae and about 60% homology to those of Schizosaccharomyces pombe and Aspergillus flavus. Southern hybridization experiments suggested that P. stipitis has only these two ADH genes. Both genes are located on the largest chromosome of P. stipitis. PsADH2 encodes for the ADH activity that is responsible for ethanol formation at oxygen limitation. The gene is regulated at the transcriptional level. Moreover, also in cells grown on ethanol, only PsADH2 transcript was found. PsADH1 transcript was detected under aerobic conditions on fermentable carbon sources.

Reference Type
Comparative Study | Journal Article | Research Support, Non-U.S. Gov't
Authors
Passoth V, Schäfer B, Liebel B, Weierstall T, Klinner U
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