ID   2.4.1.387
DE   isomaltosyltransferase.
CA   (1) 2 alpha-isomaltosyl-(1->4)-D-maltotriose = alpha-isomaltosyl-(1->3)-
CA   alpha-isomaltosyl-(1->4)-D-maltotriose + D-maltotriose.
CA   (2) alpha-isomaltosyl-(1->3)-alpha-isomaltosyl-(1->4)-D-maltotriose =
CA   cyclobis-(1->3)-alpha-D-isomaltosyl + D-maltotriose.
CC   -!- The enzyme, found in bacteria that produce cyclobis-(1->6)-alpha-
CC       nigerosyl, acts on the products of EC 2.4.1.24.
CC   -!- It catalyzes the alpha-(1->3) transfer of the isomaltosyl moiety of
CC       one substrate to another, resulting in alpha-isomaltosyl-(1->3)-
CC       alpha-isomaltosyl-alpha-(1->4)-glucan formation.
CC   -!- In addition, the enzyme catalyzes the intramolecular cyclization of
CC       the product, eventually generating cyclobis-(1->6)-alpha-nigerosyl.
DR   Q8RQV0, CTSY_SPOGL ;
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