EC 18.104.22.168 - Indole-3-acetaldehyde oxidase
IntEnz Enzyme Nomenclature
- (indol-3-yl)acetaldehyde + H2O + O2 = (indol-3-yl)acetate + H2O2
A hemoprotein. This enzyme is an isoform of aldehyde oxidase (EC 22.214.171.124). It has a preference for aldehydes having an indole-ring structure as substrate [6,7]. It may play a role in plant hormone biosynthesis as its activity is higher in the auxin-overproducing mutant, super-root1, than in wild-type Arabidopsis thaliana . While (indol-3-yl)acetaldehyde is the preferred substrate, it also oxidizes indole-3-carbaldehyde and acetaldehyde, but more slowly. The enzyme from maize contains FAD, iron and molybdenum .
Links to other databases
Cucumber seedling indoleacetaldehyde oxidase.Plant Physiol. 61 : 107-110 (1978).
Indole-3-acetaldehyde oxidase of pea-seedlings.Physiol. Plant. 51 : 402-406 (1981).
Metabolism of indole-3-acetaldehyde. III. Some characteristics of the aldehyde oxidase of Avena coleoptiles.Physiol. Plant. 24 : 272-281 (1971).
Purification and properties of flavin- and molybdenum-containing aldehyde oxidase from coleoptiles of maize.Plant Physiol. 110 : 781-789 (1996). [PMID: 12226218]
An in vitro system of indole-3-acetic acid formation from tryptophan in maize (Zea mays) coleoptile extracts.Plant Physiol. 102 : 1319-1324 (1993). [PMID: 12231908]
Molecular cloning and characterization of aldehyde oxidases in Arabidopsis thaliana.Plant Cell Physiol. 39 : 433-442 (1998). [PMID: 9615466]
Higher activity of an aldehyde oxidase in the auxin-overproducing superroot1 mutant of Arabidopsis thaliana.Plant Physiol. 116 : 687-693 (1998). [PMID: 9489015]
[EC 126.96.36.199 created 1984, modified 2004, modified 2006]