Pyridoxamine 5'-phosphate oxidase catalyses the oxidation of pyridoxamine-5-P (PMP) and pyridoxine-5-P (PNP) to pyridoxal-5-P (PLP), the terminal step in the de novo biosynthesis of PLP in Escherichia coli and part of the salvage pathway of this coenzyme in both E. coli and mammalian cells. This region is the flavoprotein FMN-binding domain.

1: Structure and mechanism of Escherichia coli pyridoxine 5'-phosphate oxidase. di Salvo ML, Safo MK, Musayev FN, Bossa F, Schirch V; Biochim Biophys Acta. 2003;1647:76-82. PMID:12686112

2: Structure and properties of recombinant human pyridoxine 5'-phosphate oxidase. Musayev FN, Di Salvo ML, Ko TP, Schirch V, Safo MK; Protein Sci. 2003;12:1455-1463. PMID:12824491