ID   1.14.13.93
DE   (+)-abscisic acid 8'-hydroxylase.
AN   (+)-ABA 8'-hydroxylase.
AN   ABA 8'-hydroxylase.
CA   (+)-abscisate + NADPH + O(2) = 8'-hydroxyabscisate + NADP(+) + H(2)O.
CF   Heme-thiolate.
CC   -!- Catalyzes the first step in the oxidative degradation of abscisic
CC       acid and is considered to be the pivotal enzyme in controlling the
CC       rate of degradation of this plant hormone.
CC   -!- CO inhibits the reaction, but its effects can be reversed by the
CC       presence of blue light.
CC   -!- The 8'-hydroxyabscisate formed can be converted into (-)-phaseic
CC       acid, most probably spontaneously.
CC   -!- Other enzymes involved in the abscisic-acid biosynthesis pathway are
CC       EC 1.1.1.288, EC 1.2.3.14 and EC 1.13.11.51.
PR   PROSITE; PDOC00081;
DR   Q949P1, ABAH1_ARATH;  Q09J79, ABAH1_ORYSI;  Q05JG2, ABAH1_ORYSJ;
DR   O81077, ABAH2_ARATH;  Q09J78, ABAH2_ORYSI;  Q6ZDE3, ABAH2_ORYSJ;
DR   Q9FH76, ABAH3_ARATH;  A2Z212, ABAH3_ORYSI;  Q0J185, ABAH3_ORYSJ;
DR   Q9LJK2, ABAH4_ARATH;
//