title: Molecular cloning and characterization of NAD(+)-dependent xylitol dehydrogenase from Candida tropicalis ATCC 20913.
abstract: Induction of xylitol dehydrogenase of Candida tropicalis ATCC 20913 by various carbon sources was investigated. The enzyme activity was induced when the yeast was grown on l-arabinose and d-xylose. A novel gene encoding the enzyme was cloned and characterized. The 1,095-bp coding sequence of the gene encodes a polypeptide of 364 amino acids, with a molecular mass of 39.4 kDa. Sequence analysis of the putative protein showed it to be a member of the zinc-containing alcohol dehydrogenase family and to have homology to xylitol dehydrogenase genes from other yeasts and fungi. The recombinant xylitol dehydrogenase expressed in Escherichia coli oxidized polyols such as xylitol and d-sorbitol and reduced ketoses such as d-xylulose and d-fructose. It required exclusively NAD or NADH as a cofactor.
authors.affiliation: Department of Biological Sciences, Korea Advanced Institute of Science and Technology, 373-1 Guseong-dong, Yuseong-gu, Daejeon 305-701, Republic of Korea.
authors.forename: Byoung Sam
authors.initials: BS
authors.lastname: Ko
authors.forename: Heung Chae
authors.initials: HC
authors.lastname: Jung
authors.forename: Jung Hoe
authors.initials: JH
authors.lastname: Kim
mesh_terms: D000595:Amino Acid Sequence; D041022:Candida tropicalis / Q000737:chemistry / Q000201:enzymology*; D003001:Cloning, Molecular / Q000379:methods; D050542:D-Xylulose Reductase / Q000737:chemistry* / Q000235:genetics / Q000378:metabolism*; D004789:Enzyme Activation; D004795:Enzyme Stability; D004926:Escherichia coli / Q000737:chemistry / Q000201:enzymology*; D008969:Molecular Sequence Data; D015202:Protein Engineering / Q000379:methods*; D011994:Recombinant Proteins / Q000737:chemistry / Q000378:metabolism
chemical_list: D011994:Recombinant Proteins; D050542:D-Xylulose Reductase