ID 4.2.1.92 DE hydroperoxide dehydratase. AN allene oxide synthase. AN AOS. AN hydroperoxide isomerase. CA (13S)-hydroperoxy-(9Z,11E,15Z)-octadecatrienoate = (9Z,13S,15Z)-12,13- CA epoxyoctadeca-9,11,15-trienoate + H2O. CC -!- Acts on a number of unsaturated fatty-acid hydroperoxides, forming CC the corresponding allene oxides. CC -!- The product of the above reaction is unstable and is acted upon by CC EC 5.3.99.6 to form the cyclopentenone derivative (15Z)-12-oxophyto- CC 10,15-dienoate (OPDA), which is the first cyclic and biologically CC active metabolite in the jasmonate biosynthesis pathway. DR K4BV52, AOS1_SOLLC ; Q9LLB0, AOS2_SOLLC ; Q8GZP5, AOS3_SOLLC ; DR Q7Y0C8, C74A1_ORYSJ; Q7XYS3, C74A2_ORYSJ; Q40778, C74A2_PARAR; DR Q6Z6L1, C74A3_ORYSJ; Q6Z6K9, C74A4_ORYSJ; Q96242, CP74A_ARATH; DR P48417, CP74_LINUS ; //