Pyridoxine 5'-phosphate oxidase

From Proteopedia

Pyridoxine 5-phosphate oxidase dimer complex with pyridoxine 5-phosphate, 2aq6 Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image Function Pyridoxine 5’-phosphate oxidase or Pyridoxamine 5’-phosphate oxidase (PNPO) catalyzes the oxidation of pyridoxamine-phosphate by molecular oxygen producing pyridoxal 5’-phosphate, ammonia and hydrogen peroxide. Pyridoxal 5’-phosphate (PLP), commonly known as vitamin B6, is a biological essential cofactor. PNPO catalyzes the last step in vitamin B6 metabolism. PNPO uses FMN as cofactor[1]. Disease PNPO mutations are present in epilepsy patients[2]. Structural highlights The active site of PNPO shows the product of PNPO catalysis - [3]. Water molecules are shown as red spheres.

3D structures of pyridoxine 5'-phosphate oxidase

Updated on 08-February-2022

1nrg - hPNPO + PLP – human
3hy8 - hPNPO (mutant) + PLP
6h00 – hPPO (mutant) + FMN
2aq6 - MtPNPO + PLP – Mycobacterium tuberculosis
1y30 - MtPNPO + FMN
1xxo - MtPNPO
1dnl, 1g76, 1wv4 – EcPNPO – Escherichia coli
1g76, 1g77, 1g78, 1g79, 1jnw – EcPPO + PLP
6ylz – EcPNPO (mutant) + FMN + Pi
6ymh – EcPNPO (mutant) + FMN + PLP
4hmw – BlPNPO + FMN – Burkholderia lata
4hmx – BlPNPO + FMN + phenazine carboxylic acid
4hms – PfPNPO + FMN – Pseudomonas fluorescense
4hmt, 4hmu, 4hmv – PfPNPO + FMN + phenazine carboxylic acid

References

1. ↑ di Salvo ML, Safo MK, Musayev FN, Bossa F, Schirch V. Structure and mechanism of Escherichia coli pyridoxine 5'-phosphate oxidase. Biochim Biophys Acta. 2003 Apr 11;1647(1-2):76-82. PMID:12686112
2. ↑ Mills PB, Camuzeaux SS, Footitt EJ, Mills KA, Gissen P, Fisher L, Das KB, Varadkar SM, Zuberi S, McWilliam R, Stodberg T, Plecko B, Baumgartner MR, Maier O, Calvert S, Riney K, Wolf NI, Livingston JH, Bala P, Morel CF, Feillet F, Raimondi F, Del Giudice E, Chong WK, Pitt M, Clayton PT. Epilepsy due to PNPO mutations: genotype, environment and treatment affect presentation and outcome. Brain. 2014 May;137(Pt 5):1350-60. doi: 10.1093/brain/awu051. Epub 2014 Mar 18. PMID:24645144 doi:http://dx.doi.org/10.1093/brain/awu051
3. ↑ Biswal BK, Cherney MM, Wang M, Garen C, James MN. Structures of Mycobacterium tuberculosispyridoxine 5'-phosphate oxidase and its complexes with flavin mononucleotide and pyridoxal 5'-phosphate. Acta Crystallogr D Biol Crystallogr. 2005 Nov;61(Pt 11):1492-9. Epub 2005, Oct 19. PMID:16239726 doi:10.1107/S0907444905026673