This is a family of Rossmann fold oxidoreductases that catalyse NADPH-dependent hydroxylation and are involved in siderophore biosynthesis. This family includes L-ornithine 5-monooxygenase, which catalyses the hydroxylation of L-ornithine at the N5 position [1,2], and L-lysine 6-monooxygenase, which catalyses the hydroxylation of lysine at the N6 position (EC:1.14.13.59) [3].

1: Cloning and nucleotide sequence of the pvdA gene encoding the pyoverdin biosynthetic enzyme L-ornithine N5-oxygenase in Pseudomonas aeruginosa. Visca P, Ciervo A, Orsi N; J Bacteriol. 1994;176:1128-1140. PMID:8106324

2: dffA gene from Aspergillus oryzae encodes L-ornithine N5-oxygenase and is indispensable for deferriferrichrysin biosynthesis. Yamada O, Na Nan S, Akao T, Tominaga M, Watanabe H, Satoh T, Enei H, Akita O; J Biosci Bioeng. 2003;95:82-88. PMID:16233371

3: A genetic locus required for iron acquisition in Mycobacterium tuberculosis. Krithika R, Marathe U, Saxena P, Ansari MZ, Mohanty D, Gokhale RS; Proc Natl Acad Sci U S A. 2006;103:2069-2074. PMID:16461464