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Information on EC 1.14.14.137 - (+)-abscisic acid 8'-hydroxylase

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IUBMB Comments
A heme-thiolate protein (P-450). Catalyses the first step in the oxidative degradation of abscisic acid and is considered to be the pivotal enzyme in controlling the rate of degradation of this plant hormone . CO inhibits the reaction, but its effects can be reversed by the presence of blue light . The 8'-hydroxyabscisate formed can be converted into (-)-phaseic acid, most probably spontaneously. Other enzymes involved in the abscisic-acid biosynthesis pathway are EC 1.1.1.288 (xanthoxin dehydrogenase), EC 1.2.3.14 (abscisic-aldehyde oxidase) and EC 1.13.11.51 (9-cis-epoxycarotenoid dioxygenase).
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Word Map
The enzyme appears in viruses and cellular organisms
Synonyms
aba 8'-hydroxylase, cyp707a, cyp707a2, cyp707a3, cyp707a1, ahcyp707a1, taaba8'oh1, aba-8'-hydroxylase, ahcyp707a2, abscisic acid 8'-hydroxylase, more
REACTION
REACTION DIAGRAM
COMMENTARY hide
ORGANISM
UNIPROT
LITERATURE
(+)-abscisate + [reduced NADPH-hemoprotein reductase] + O2 = 8'-hydroxyabscisate + [oxidized NADPH-hemoprotein reductase] + H2O
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PATHWAY SOURCE
PATHWAYS
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