IUBMB Enzyme Nomenclature


Accepted name: cyclomaltodextrin glucanotransferase

Reaction: Cyclizes part of a (1→4)-α-D-glucan chain by formation of a 1→4)-α-D-glucosidic bond

Other name(s): Bacillus macerans amylase; cyclodextrin glucanotransferase; α-cyclodextrin glucanotransferase; α-cyclodextrin glycosyltransferase; β-cyclodextrin glucanotransferase; β-cyclodextrin glycosyltransferase; γ-cyclodextrin glycosyltransferase; cyclodextrin glycosyltransferase; cyclomaltodextrin glucotransferase; cyclomaltodextrin glycosyltransferase; konchizaimu; α-1,4-glucan 4-glycosyltransferase, cyclizing; BMA; CGTase; neutral-cyclodextrin glycosyltransferase; 1,4-α-D-glucan 4-α-D-(1,4-α-D-glucano)-transferase (cyclizing)

Systematic name: (1→4)-α-D-glucan 4-α-D-[(1→4)-α-D-glucano]-transferase (cyclizing)

Comments: Cyclomaltodextrins (Schardinger dextrins) of various sizes (6,7,8, etc. glucose units) are formed reversibly from starch and similar substrates. Will also disproportionate linear maltodextrins without cyclizing (cf. EC, 4-α-glucanotransferase).

Links to other databases: BRENDA, EXPASY, KEGG, Metacyc, PDB, CAS registry number: 9030-09-5


1. DePinto, J.A. and Campbell, L.L. Purification and properties of the amylase of Bacillus macerans. Biochemistry 7 (1968) 114-120. [PMID: 5758537]

2. French, D., Levine, M.L., Norberg, E., Norden, P., Pazur, J.H. and Wild, G.M. Studies on the Schardinger dextrins. VII. Co-substrate specificity in coupling reactions of Macerans amylase. J. Am. Chem. Soc. 76 (1954) 2387-2390.

3. Hehre, E.J. Enzymic synthesis of polysaccharides: a biological type of polymerization. Adv. Enzymol. Relat. Subj. Biochem. 11 (1951) 297-337.

4. Schwimmer, S. Evidence for the purity of Schardinger dextrinogenase. Arch. Biochem. Biophys. 43 (1953) 108-117. [PMID: 13031665]

[EC created 1961]

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