The utilization of rare and unnatural pentoses by yeast Torulopsis candida.
Adaptation of yeast torulopsis candida to D-arabinose, D-lyxose and L-oxylose is shown to be due to the appearance of a new enzyme which catalyzes the reduction of these pentoses to D-arabitol and xylitol, respectively. The appearance of the enzyme is not coupled with the altered state of polyol : NADP-oxidoreductase (1.1.1.21) catalyzing the reduction of D-xylose and other aldoses with their second carbon atom having a stereoconformation of D-glyceraldehyde. Some proposals are made on improvements of the nomenclature of the enzymes catalyzing the reduction of the two groups of pentoses.
D000429:Alcohol Oxidoreductases / Q000096:biosynthesis; D000449:Aldehyde Reductase / Q000096:biosynthesis; D001089:Arabinose / Q000378:metabolism; D002175:Candida / Q000378:metabolism*; D004790:Enzyme Induction; D010429:Pentoses / Q000378:metabolism*; D014994:Xylose / Q000378:metabolism
D010429:Pentoses; D014994:Xylose; D001089:Arabinose; D000429:Alcohol Oxidoreductases; D000449:Aldehyde Reductase