oxidoreductase activity, acting on diphenols and related substances as donors, oxygen as acceptor 3-hydroxyanthranilate oxidase activity https://github.com/geneontology/go-ontology/issues/30193 RHEA:17245 3-hydroxyanthranilate:oxygen oxidoreductase activity EC:1.10.3.5 Catalysis of the reaction: 3-hydroxyanthranilate + O2 = 6-imino-5-oxocyclohexa-1,3-dienecarboxylate + H2O2. MetaCyc:3-HYDROXYANTHRANILATE-OXIDASE-RXN GO:0047561 KEGG_REACTION:R02666 3-hydroxyanthranilic acid oxidase activity molecular_function