KEGG   ENZYME: 5.4.99.11Help
Entry
EC 5.4.99.11                Enzyme                                 

Name
isomaltulose synthase;
isomaltulose synthetase;
sucrose alpha-glucosyltransferase;
trehalulose synthase
Class
Isomerases;
Intramolecular transferases;
Transferring other groups
BRITE hierarchy
Sysname
sucrose glucosylmutase
Reaction(IUBMB)
sucrose = 6-O-alpha-D-glucopyranosyl-D-fructofuranose [RN:R00810 R06217]
Reaction(KEGG)
Substrate
sucrose [CPD:C00089]
Product
6-O-alpha-D-glucopyranosyl-D-fructofuranose [CPD:C01742]
Comment
The enzyme simultaneously produces isomaltulose (6-O-alpha-D-glucopyranosyl-D-fructose) and smaller amounts of trehalulose (1-O-alpha-D-glucopyranosyl-beta-D-fructose) from sucrose.
History
EC 5.4.99.11 created 1989 (EC 5.4.99.10 created 1984, incorporated 1992)
Reference
1  [PMID:6743261]
  Authors
Cheetham PS.
  Title
The extraction and mechanism of a novel isomaltulose-synthesizing enzyme from Erwinia rhapontici.
  Journal
Biochem. J. 220 (1984) 213-20.
  Organism
Erwinia rhapontici
Reference
2
  Authors
Cheetham, P.S.J., Imber, C.E. and Isherwood, J.
  Title
The formation of isomaltulose by immobilized Erwinia rhapontici.
  Journal
Nature 299 (1982) 628-631.
Other DBs
ExplorEnz - The Enzyme Database: 
IUBMB Enzyme Nomenclature: 
ExPASy - ENZYME nomenclature database: 
BRENDA, the Enzyme Database: 
CAS: 
159940-49-5

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