Synthesis of 2-Deoxy-glucooligosaccharides through Condensation of 2-Deoxy-D-glucose by Glucoamylase and α-Glucosidase

抄録

Glucoamylases from A spergillus niger and Rhizopus niveus catalyzed condensation of 2-deoxy-D-glucose (dGlc) to yield deoxy-glucooligosaccharides with polymerization degrees of 2-5. The enzymes also gave a small amount of products from 3-deoxy-D-glucose, but no products from 6-deoxy-D-glucose. A. niger α-glucosidase also catalyzed condensation of dGlc, while Torula and Saccharomyces α-glucosidases had low activity. α-1, 4-, 1, 6-, and 1, 3-linked deoxy-glucobioses were isolated and identified as the products of A. niger glucoamylase and A. niger α-glucosidase. In the reaction of the glucoamylase, 1, 4- and 1, 3-linked saccharides decreased with an increase of 1, 6-linked one. A. niger α-glucosidase produced α-1, 6-linked disaccharide predominantly during the whole course of the reaction.