Isomaltulose synthase
In enzymology, an isomaltulose synthase is an enzyme that catalyzes the chemical reaction:
Hence, this enzyme has one substrate, sucrose, and one product, 6-O-alpha-D-glucopyranosyl-D-fructofuranose. It converts the α-1,2 glycosidic linkage between glucose and fructose in sucrose into the α-1,6 glycosidic linkage between glucose and fructose in isomaltulose.
This enzyme belongs to the family of isomerases. The systematic name of this enzyme class is sucrose glucosylmutase. Other names in common use include sucrose isomerase, sucrose alpha-glucosyltransferase, and trehalulose synthase.
The isomaltulose synthase of the bacterium Protaminobacter rubrum is commonly used in the industrial production of isomaltulose.