Isoamylase
Definition:
EC Tree > 3 Hydrolases > 3.2 Glycosylases > 3.2.1 Glycosidases, i.e. enzymes that hydrolyse O- and S-glycosyl compounds > 3.2.1.68 isoamylase
Isoamylase is a debranching amylase that hydrolyses (1->6)-alpha-D-glucosidic branch linkages in glycogen, amylopectin and their beta-limit dextrins, and also readily hydrolyses amylopectin; it differs from pullulanase (EC 3.2.1.41) and limit dextrinase (EC 3.2.1.142) by its inability to hydrolyse pullulan and limited action on alpha-limit dextrins, and maltose is the smallest sugar it can release from an alpha-(1->6)-linkage. By removing glycogen and amylopectin branch points it is used in starch processing and in plant starch debranching. It is distributed across Eukaryota, Bacteria and Archaea.
Isoamylase is a debranching amylase that hydrolyses (1->6)-alpha-D-glucosidic branch linkages in glycogen, amylopectin and their beta-limit dextrins, and also readily hydrolyses amylopectin; it differs from pullulanase (EC 3.2.1.41) and limit dextrinase (EC 3.2.1.142) by its inability to hydrolyse pullulan and limited action on alpha-limit dextrins, and maltose is the smallest sugar it can release from an alpha-(1->6)-linkage. By removing glycogen and amylopectin branch points it is used in starch processing and in plant starch debranching. It is distributed across Eukaryota, Bacteria and Archaea.
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