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ENZYME entry: EC

Accepted Name
Aldos-2-ulose dehydratase.
Alternative Name(s)
1,5-anhydro-D-fructose dehydratase (microthecin-forming).
Pyranosone dehydratase.
Reaction catalysed
1,5-anhydro-D-fructose <=> 2-hydroxy-2-(hydroxymethyl)-2H-pyran-3(6H)-one + H(2)O
  • This enzyme catalyzes two of the steps in the anhydrofructose pathway, which leads to the degradation of glycogen and starch via 1,5-anhydro-D-fructose.
  • Aldose-2-uloses such as 2-dehydroglucose can also act as substrates, but more slowly.
  • This is a bifunctional enzyme that acts as both a lyase and as an isomerase.
  • Differs from EC, which can carry out only reaction 1, is inhibited by its product and requires metal ions for activity.
PRIAM enzyme-specific profiles4.2.1.110
KEGG Ligand Database for Enzyme Nomenclature4.2.1.110
IUBMB Enzyme Nomenclature4.2.1.110
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