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EC 2.4.1.140 Details
EC number
2.4.1.140
Accepted name
alternansucrase
Reaction
Transfers alternately an α-D-glucosyl residue from sucrose to the 6-position and the 3-position of the non-reducing terminal residue of an α-D-glucan, thus producing a glucan having alternating α-(1→6)- and α-(1→3)-linkages
Other name(s)
sucrose-1,6(3)-α-glucan 6(3)-α-glucosyltransferase, sucrose:1,6-, 1,3-α-D-glucan 3-α- and 6-α-D-glucosyltransferase, sucrose:1,6(1,3)-α-D-glucan 6(3)-α-D-glucosyltransferase
Systematic name
sucrose:(1→6)[(1→3)]-α-D-glucan 6(3)-α-D-glucosyltransferase
CAS registry number
100630-46-4
Comment
The glucansucrases transfer a D-glucosyl residue from sucrose to a glucan chain. They are classified based on the linkage by which they attach the transferred residue. In some cases, in which the enzyme forms more than one linkage type, classification relies on the relative proportion of the linkages that are generated. This enzyme forms both α(1→3) and α(1→6) linkages in approximately equal amounts by alternating the linkage type. cf. EC 2.4.1.125, sucrose—1,6-α-glucan 3(6)-α-glucosyltransferase.
History
created 1984, modified 2003
EC Tree
2.4.1.3 created 1961, deleted 1972
2.4.1.6 created 1961, deleted 1972
2.4.1.42 created 1972, deleted 1984
2.4.1.51 created 1972, deleted 1984
2.4.1.55 created 1972, deleted 1982
2.4.1.59 created 1972, deleted 1984
2.4.1.61 created 1972, deleted 1984
2.4.1.72 created 1972, deleted 1976
2.4.1.75 created 1976, deleted 2005
2.4.1.76 created 1976, deleted 1984
2.4.1.77 created 1976, deleted 1984
2.4.1.84 created 1976, deleted 1984
2.4.1.89 created 1976, deleted 1984
2.4.1.93 created 1976, deleted 2004
2.4.1.98 created 1980, deleted 1984
2.4.1.107 created 1983, deleted 1984
2.4.1.108 created 1983, deleted 1984
2.4.1.124 created 1984, deleted 2002
2.4.1.151 created 1984, deleted 2002
2.4.1.169 created 1989, deleted 2003
2.4.1.200 created 1992, deleted 2004
2.4.1.204 created 1992, deleted 2003
2.4.1.233 created 2004, deleted 2005