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A new class EC 7, Translocases, has been added to the EC list. It will be part of ENZYME from release 2018_10. Read more about EC 7 here.

ENZYME entry: EC

Accepted Name
Inulin fructotransferase (DFA-III-forming).
Alternative Name(s)
Inulase II.
Inulin D-fructosyl-D-fructosyltransferase (1,2':2,3'-dianhydride- forming).
Inulin D-fructosyl-D-fructosyltransferase (forming alpha-D-fructofuranose beta-D-fructofuranose 1,2':2,3'-dianhydride).
Inulin fructotransferase (depolymerizing).
Inulin fructotransferase (depolymerizing, difructofuranose- 1,2':2,3'-dianhydride-forming).
Inulin fructotransferase (DFA-III-producing).
Inulinase II.
Reaction catalysed
Produces alpha-D-fructofuranose beta-D-fructofuranose 1,2':2,3'-dianhydride (DFA III) by successively eliminating the diminishing (2->1)-beta-D-fructan (inulin) chain from the terminal D-fructosyl-D-fructosyl disaccharide
  • This enzyme, like EC and EC eliminates the fructan chain from the terminal disaccharide leaving a difructose dianhydride.
  • These enzymes have long been known as fructotransferases, so this is retained in the description (official name).
  • Since the transfer is intramolecular, the reaction is an elimination and, hence, the enzyme is a lyase, belonging in enzyme class 4.-.-.-.
  • Formerly EC
PRIAM enzyme-specific profiles4.2.2.18
KEGG Ligand Database for Enzyme Nomenclature4.2.2.18
IUBMB Enzyme Nomenclature4.2.2.18
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All ENZYME / UniProtKB/Swiss-Prot entries corresponding to 4.2.2.-
All ENZYME / UniProtKB/Swiss-Prot entries corresponding to 4.2.-.-
All ENZYME / UniProtKB/Swiss-Prot entries corresponding to 4.-.-.-