EC - Abscisic-aldehyde oxidase

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IntEnz Enzyme Nomenclature


Accepted name:
abscisic-aldehyde oxidase
Other names:
abscisic aldehyde oxidase
Systematic name:
abscisic-aldehyde:oxygen oxidoreductase



Acts on both (+)- and (−)-abscisic aldehyde. Involved in the abscisic-acid biosynthesis pathway in plants, along with EC, (xanthoxin dehydrogenase), EC (9-cis-epoxycarotenoid dioxygenase) and EC [(+)-abscisic acid 8'-hydroxylase]. While abscisic aldehyde is the best substrate, the enzyme also acts with indole-3-aldehyde, 1-naphthaldehyde and benzaldehyde as substrates, but more slowly [3].

Links to other databases

Enzymes and pathways: NC-IUBMB , BRENDA , DIAGRAM , ExplorEnz , ENZYME@ExPASy , KEGG , MetaCyc , UniPathway
Structural data: CSA , EC2PDB
Gene Ontology: GO:0010293


  1. Sagi, M., Fluhr, R. and Lips, S.H.
    Aldehyde oxidase and xanthin dehydrogenase in a flacca tomato mutant with deficient abscisic acid and wilty phenotype.
    Plant Physiol. 120 : 571-578 (1999). [PMID: 10364409]
  2. Seo, M., Peeters, A.J., Koiwai, H., Oritani, T., Marion-Poll, A., Zeevaart, J.A., Koornneef, M., Kamiya, Y. and Koshiba, T.
    The Arabidopsis aldehyde oxidase 3 (AAO3) gene product catalyzes the final step in abscisic acid biosynthesis in leaves.
    Proc. Natl. Acad. Sci. USA 97 : 12908-12913 (2000). [PMID: 11050171]
  3. Seo, M., Koiwai, H., Akaba, S., Komano, T., Oritani, T., Kamiya, Y. and Koshiba, T.
    Abscisic aldehyde oxidase in leaves of Arabidopsis thaliana.
    Plant J. 23 : 481-488 (2000). [PMID: 10972874]

[EC created 2005]