Glycosidic bond rearrangements in isomeric xylobioses by yeast xylan-degrading enzymes.


The cells of Cryptococcus albidus induced for xylan-degrading enzymes are capable of transforming 1,2-beta-xylobiose and 1,3-beta-xylobiose into 1,4-beta-xylobiose, the natural inducer. The conversion involves transglycosylation and hydrolysis catalyzed by beta-xylosidase and beta-xylanase. A probable intermediate of the conversion of 1,2-beta-xylobiose was… (More)