| EC |
2.4.1.25 |
| 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 2.4.1.3 (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 3.2.1.33 amylo-α-1,6-glucosidase). |
| Links to other databases: |
BRENDA, EXPASY, Gene, KEGG, MetaCyc, PDB, CAS registry number: 9032-09-1 |
| References: |
| 1. |
Hehre, E.J. Enzymic synthesis of polysaccharides: a biological type of polymerization. Adv. Enzymol. Relat. Subj. Biochem. 11 (1951) 297–337. [PMID: 24540594] |
| 2. |
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) |
| 3. |
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] |
| 4. |
Walker, G.J. and Whelan, W.J. Synthesis of amylose by potato D-enzyme. Nature 183 (1959) 46. [PMID: 13622683] |
| 5. |
Whelan, W.H. Enzymic explorations of the structures of starch and glycogen. Biochem. J. 122 (1971) 609–622. [PMID: 5001952] |
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| [EC 2.4.1.25 created 1965 (EC 2.4.1.3 created 1961, incorporated 1972)] |
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