ID 2.4.1.125 DE sucrose--1,6-alpha-glucan 3(6)-alpha-glucosyltransferase. AN water-soluble-glucan synthase. CA (1) [(1->6)-alpha-D-glucosyl](n) + sucrose = [(1->6)-alpha-D- CA glucosyl](n+1) + D-fructose. CA (2) [(1->6)-alpha-D-glucosyl](n) + sucrose = (1->3)-alpha-D-glucosyl- CA [(1->6)-alpha-D-glucosyl](n) + D-fructose. CC -!- The glucansucrases transfer a D-glucosyl residue from sucrose to a CC glucan chain. CC -!- They are classified based on the linkage by which they attach the CC transferred residue. CC -!- In some cases, in which the enzyme forms more than one linkage type, CC classification relies on the relative proportion of the linkages that CC are generated. CC -!- This enzyme extends (1->6)-alpha-D-glucans by both alpha(1->3) and CC alpha(1->6) linkages, with one of the linkage types being dominant. CC cf. EC 2.4.1.140. //