In enzymology, an allene-oxide cyclase (EC 126.96.36.199) is an enzyme that catalyzes the chemical reaction
Hence, this enzyme has one substrate, (9Z)-(13S)-12,13-epoxyoctadeca-9,11,15-trienoate, and one product, (15Z)-12-oxophyto-10,15-dienoate.
This enzyme belongs to the family of isomerases, specifically a class of other intramolecular oxidoreductases. The systematic name of this enzyme class is (9Z)-(13S)-12,13-epoxyoctadeca-9,11,15-trienoate isomerase (cyclizing).
As of late 2007, 6 structures have been solved for this class of enzymes, with PDB accession codes 1Z8K, 1ZVC, 2BRJ, 2DIO, 2GIN, and 2Q4I.