Reference: Kinclová O, et al. (2001) The Zygosaccharomyces rouxii strain CBS732 contains only one copy of the HOG1 and the SOD2 genes. J Biotechnol 88(2):151-8

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Abstract


The osmotolerant yeast Zygosaccharomyces rouxii CBS732 contains only one copy of the ZrHOG1 and ZrSOD2-22 genes. Both genes were cloned and sequenced (Acc. Nos. AJ132606 and AJ252273, respectively) and their sequences were compared to homologous pairs of genes from Z. rouxii ATCC42981 (genes Z-HOG1, Z-HOG2, Z-SOD2, Z-SOD22). The CBS732 ZrHog1p is shorter than its ATCC42981 counterparts (380 aa residues vs. 407 and 420 aa, respectively) and is more similar to ATCC42981 Z-Hog2p than to Z-Hog1p. Also its promoter region corresponds to that one of Z-HOG2. The CBS732 ZrHOG1 promoter region is recognised by Saccharomyces cerevisiae, and the gene product (MAP kinase ZrHog1p) presence fully complements the osmosensitivity of a S. cerevisiae hog1 mutant strain. The CBS ZrSOD2-22 gene is highly similar to ATCC42981 Z-SOD2 but it contains also a segment of 15 aa residues specific for Z-SOD22. Z. rouxii ZrSod2-22 Na(+)/H(+) antiporter expressed in S. cerevisiae shows better activity toward toxic Na(+) and Li(+) cations than does S. cerevisiae's own Nha1 antiporter, and is efficient in improving the halotolerance of some S. cerevisiae wild types.

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Journal Article | Research Support, Non-U.S. Gov't
Authors
Kinclová O, Potier S, Sychrová H
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