Reaction: ATP + 3-aminoavenalumate + nitrite = AMP + diphosphate + 3-diazoavenalumate + H2O
Glossary: 3-aminoavenalumate = (2E,4E)-5-(3-amino-4-hydroxyphenyl)penta-2,4-dienoate
3-diazoavenalumate = 1-{3-[(1E,3E)-4-carboxylatobuta-1,3-dien-1-yl]-6-oxocyclohexa-2,4-dien-1-ylidene}diazenium
Other name(s): avaA6 (gene name)
Systematic name: 3-aminoavenalumate:nitrite ligase (AMP-forming)
Comments: The enzyme, characterized from the bacterium Streptomyces sp. RI-77, participates in the biosynthesis of avenalumate, a phenolic acid originally described from oat (Avena sativa). It can also act on 3-aminocoumarate and 3-amino-4-hydroxybenzoate with lower activity.
Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc, CAS registry number:
References:
1. Kawai, S., Hagihara, R., Shin-Ya, K., Katsuyama, Y. and Ohnishi, Y. Bacterial avenalumic acid biosynthesis includes substitution of an aromatic amino group for hydride by nitrous acid dependent diazotization. Angew. Chem. Int. Ed. Engl. 61 (2022) e202211728. [PMID: 36115045]