ENZYME entry: EC 2.4.1.248

Accepted Name
Cycloisomaltooligosaccharide glucanotransferase.
Reaction catalysed
Cyclizes part of a (1->6)-alpha-D-glucan chain by formation of a (1->6)-alpha-D-glucosidic bond
Comment(s)
  • Specific for (1->6)-alpha-D-glucans (dextrans) and, unlike cyclomaltodextrin glucanotransferase (EC 2.4.1.19), without activity toward (1->4)-alpha-D-glucans, such as amylose.
  • It also has no activity on oligosaccharides, such as amylopectin and pullulan, containing (1->6)-alpha-D-glucosidic linkages at branch points.
  • The enzyme from Bacillus circulans T-3040 has been shown to form cycloisomalto-oligosaccharides of three sizes (7, 8 and 9 glucose units).
  • It will also catalyze the disproportionation of two isomalto- oligosaccharides molecules to yield a series of isomalto- oligosachharides and the addition of D-glucose to cycloisomalto- oligosaccharides with ring opening to form isomalto-oligosaccharides.
Cross-references
PROSITEPDOC51175
BRENDA2.4.1.248
EC2PDB2.4.1.248
ExplorEnz2.4.1.248
PRIAM enzyme-specific profiles2.4.1.248
KEGG Ligand Database for Enzyme Nomenclature2.4.1.248
IUBMB Enzyme Nomenclature2.4.1.248
IntEnz2.4.1.248
MEDLINEFind literature relating to 2.4.1.248
MetaCyc2.4.1.248
UniProtKB/Swiss-Prot
P94286, CTA1_BACCI;  P70873, CTA2_BACCI;  

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