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Accepted name: 4-α-glucanotransferase
Reaction: Transfers a segment of a (1→4)-α-
D-glucan to a new position in an acceptor, which may be glucose or a (1→4)-α- D-glucan
Other name(s): disproportionating enzyme; dextrin glycosyltransferase;
D-enzyme; debranching enzyme maltodextrin glycosyltransferase; amylomaltase; dextrin transglycosylase; 1,4-α- D-glucan:1,4-α- D-glucan 4-α- D-glycosyltransferase
Systematic name: (1→4)-α-
D-glucan:(1→4)-α- D-glucan 4-α- D-glycosyltransferase
Comments: This entry covers the former separate entry for EC 126.96.36.199 (amylomaltase). The plant enzyme has been termed
D-enzyme. An enzymic activity of this nature forms part of the mammalian and yeast glycogen debranching system (see EC 188.8.131.52 amylo-α-1,6-glucosidase).
Links to other databases:
BRENDA, EXPASY, KEGG, MetaCyc, PDB, CAS registry number: 9032-09-1
Hehre, E.J. Enzymic synthesis of polysaccharides: a biological type of polymerization.
Adv. Enzymol. Relat. Subj. Biochem. 11 (1951) 297–337.
Lukomskaya, I.S. Synthesis of oligosaccharides with α-1,6-bonds by enzyme preparations from liver and muscle.
Dokl. Akad. Nauk S.S.S.R. 129 (1959) 1172–1175. (in Russian)
Pazur, J.H. and Okada, S. The isolation and mode of action of a bacterial glucanosyltransferase.
J. Biol. Chem. 243 (1968) 4732–4738. [PMID: 4972097]
Walker, G.J. and Whelan, W.J. Synthesis of amylose by potato
D-enzyme. Nature 183 (1959) 46. [PMID: 13622683]
Whelan, W.H. Enzymic explorations of the structures of starch and glycogen.
Biochem. J. 122 (1971) 609–622. [PMID: 5001952]
[EC 184.108.40.206 created 1965 (EC 220.127.116.11 created 1961, incorporated 1972)]
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