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ENZYME entry: EC 2.4.1.140

Accepted Name
Alternansucrase.
Alternative Name(s)
Sucrose-1,6(3)-alpha-glucan 6(3)-alpha-glucosyltransferase.
Sucrose:1,6-, 1,3-alpha-D-glucan 3-alpha- and 6-alpha-D- glucosyltransferase.
Reaction catalysed
Transfers alternately an alpha-D-glucosyl residue from sucrose to the 6-position and the 3-position of the non-reducing terminal residue of an alpha-D-glucan, thus producing a glucan having alternating alpha-(1->6)-and alpha-(1->3)-linkages
Comment(s)
  • The glucansucrases transfer a D-glusosyl 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 alpha(1->3) and alpha(1->6) linkages in approximately equal amounts by alternating the linkage type.
  • Cf. EC 2.4.1.125.
Cross-references
BRENDA2.4.1.140
EC2PDB2.4.1.140
ExplorEnz2.4.1.140
PRIAM enzyme-specific profiles2.4.1.140
KEGG Ligand Database for Enzyme Nomenclature2.4.1.140
IUBMB Enzyme Nomenclature2.4.1.140
IntEnz2.4.1.140
MEDLINEFind literature relating to 2.4.1.140
MetaCyc2.4.1.140
Rhea expert-curated reactions2.4.1.140

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All ENZYME / UniProtKB/Swiss-Prot entries corresponding to 2.4.1.-
All ENZYME / UniProtKB/Swiss-Prot entries corresponding to 2.4.-.-
All ENZYME / UniProtKB/Swiss-Prot entries corresponding to 2.-.-.-