Alpha-isomaltosyltransferase, process for producing the same and use thereof

摘要

The object of the present invention is to provide an alpha-isomaltosyl-transferring enzyme which forms a cyclotetrasaccharide having the structure of cyclo{->6)-alpha-D-glucopyranosyl-(1->3)-alpha-D-glucopyranosyl-(1->6)-alpha-D-glucopyranosyl-(1->3)-alpha-D-glucopyranosyl-(1->} from a saccharide having a glucose polymerization degree of at least three and having both the alpha-1,6 glucosidic linkage as a linkage at the non-reducing end and the alpha-1,4 glucosidic linkage other than the linkage at the non-reducing end; microorganisms which produce the enzyme; process for producing the enzyme; cyclotetra-saccharide or saccharide compositions comprising the same; and uses thereof.