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 |
PROSITE | PDOC51175 |
BRENDA | 2.4.1.248 |
EC2PDB | 2.4.1.248 |
ExplorEnz | 2.4.1.248 |
PRIAM enzyme-specific profiles | 2.4.1.248 |
KEGG Ligand Database for Enzyme Nomenclature | 2.4.1.248 |
IUBMB Enzyme Nomenclature | 2.4.1.248 |
IntEnz | 2.4.1.248 |
MEDLINE | Find literature relating to 2.4.1.248 |
MetaCyc | 2.4.1.248 |
Rhea expert-curated reactions | 2.4.1.248 |
UniProtKB/Swiss-Prot |
|
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