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EC 1.2.3.7 Details
EC number
1.2.3.7
Accepted name
indole-3-acetaldehyde oxidase
Reaction
(indol-3-yl)acetaldehyde + H2O + O2 = (indol-3-yl)acetate + H2O2
Other name(s)
indoleacetaldehyde oxidase, IAAld oxidase, AO1, indole-3-acetaldehyde:oxygen oxidoreductase
Systematic name
(indol-3-yl)acetaldehyde:oxygen oxidoreductase
CAS registry number
66082-22-2
Comment
A hemoprotein. This enzyme is an isoform of aldehyde oxidase (EC 1.2.3.1). 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 [7]. 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 [4].
History
created 1984, modified 2004, modified 2006
EC Tree
1.1.1.68 created 1965, deleted 1978 [transferred to EC 1.1.99.15, deleted 1980]
1.1.1.70 created 1965, deleted 1978
1.1.1.74 created 1972, deleted 1976
1.1.1.89 created 1972, deleted 1976
1.1.1.109 created 1972, deleted 1976
1.1.1.139 created 1972, deleted 1978
1.1.1.155 created 1976, deleted 2004
1.1.1.171 created 1978, deleted 1984
1.1.1.180 created 1983, deleted 1984
1.1.1.182 created 1983, deleted 1990
1.1.1.204 created 1972 as EC 1.2.1.37, transferred 1984 to EC 1.1.1.204, modified 1989, deleted 2004
1.1.1.242 created 1992, deleted 2001
1.1.1.249 provisional version created 1999, deleted 1999 (reinstated 2001 as EC 2.5.1.46)
1.1.1.253 created 1999, deleted 2003
1.2.3.2 created 1961, deleted 1984
1.2.3.10 created 1990, deleted 2003
1.2.3.12 created 2000, deleted 2003