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Molecular cloning and functional expression of alternative oxidase from Candida albicans
1Laboratory of Biophysics, Department of Microbiology, College of Natural Sciences, and Research Center for Molecular Microbiology, Seoul National University, Seoul 151-742, Republic of Korea.
Abstract:
The AOX1 gene, which encodes an alternative oxidase, was isolated from the genomic DNA library of Candida albicans. The gene encodes a polypeptide consisting of 379 amino acids with a calculated molecular mass of 43,975 Da. The aox1/aox1 mutant strain did not show cyanide-resistant respiration under normal conditions but could still induce cyanide-resistant respiration when treated with antimycin A. The measurement of respiratory activity and Western blot analysis suggested the presence of another AOX. When C. albicans AOX1 was expressed in alternative oxidase-deficient Saccharomyces cerevisiae, it could confer cyanide-resistant respiration on S. cerevisiae.