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EC 1.14.13.79 Details
EC number
1.14.13.79
Accepted name
ent-kaurenoic acid oxidase
Reaction
ent-kaur-16-en-19-oate + 3 NADPH + 3 H+ + 3 O2 = gibberellin A12 + 3 NADP+ + 4 H2O (overall reaction);;(1a) ent-kaur-16-en-19-oate + NADPH + H+ + O2 = ent-7α-hydroxykaur-16-en-19-oate + NADP+ + H2O;;(1b) ent-7α-hydroxykaur-16-en-19-oate + NADPH + H+ + O2 = gibberellin A12 aldehyde + NADP+ + 2 H2O;;(1c) gibberellin A12 aldehyde + NADPH + H+ + O2 = gibberellin A12 + NADP+ + H2O
Systematic name
ent-kaur-16-en-19-oate,NADPH:oxygen oxidoreductase (hydroxylating)
CAS registry number
337507-95-6
Comment
Requires cytochrome P-450. Catalyses three sucessive oxidations of ent-kaurenoic acid. The second step includes a ring-B contraction giving the gibbane skeleton. In pumpkin (Cucurbita maxima) ent-6α,7α-dihydroxykaur-16-en-19-oate is also formed.
History
created 2002, deleted 2018
EC Tree
1.14.13.45 created 1992, deleted 2003
1.14.17.2 created 1972, deleted 1984