Accepted name: (S)-2-hydroxypropylphosphonic acid epoxidase
Reaction: (S)-2-hydroxypropylphosphonate + H2O2 = (1R,2S)-1,2-epoxypropylphosphonate + 2 H2O
Glossary: (1R,2S)-1,2-epoxypropylphosphonate = fosfomycin = [(2R,3S)-3-methyloxiran-2-yl]phosphonate
Other name(s): HPP epoxidase; HppE; 2-hydroxypropylphosphonic acid epoxidase; Fom4; (S)-2-hydroxypropylphosphonate epoxidase
Systematic name: (S)-2-hydroxypropylphosphonate:hydrogen-peroxide epoxidase
Comments: This is the last enzyme in the biosynthetic pathway of fosfomycin, a broad-spectrum antibiotic produced by certain Streptomyces species. Contains non heme iron that forms a iron(IV)-oxo (ferryl) complex with hydrogen peroxide, which functions as a proton abstractor from the substrate [7].
1.  Munos, J.W., Moon, S.J., Mansoorabadi, S.O., Chang, W., Hong, L., Yan, F., Liu, A. and Liu, H.W. Purification and characterization of the epoxidase catalyzing the formation of fosfomycin from Pseudomonas syringae. Biochemistry 47 (2008) 8726–8735. [PMID: 18656958]
2.  Yan, F., Moon, S.J., Liu, P., Zhao, Z., Lipscomb, J.D., Liu, A. and Liu, H.W. Determination of the substrate binding mode to the active site iron of (S)-2-hydroxypropylphosphonic acid epoxidase using 17O-enriched substrates and substrate analogues. Biochemistry 46 (2007) 12628–12638. [PMID: 17927218]
3.  Hidaka, T., Goda, M., Kuzuyama, T., Takei, N., Hidaka, M. and Seto, H. Cloning and nucleotide sequence of fosfomycin biosynthetic genes of Streptomyces wedmorensis. Mol. Gen. Genet. 249 (1995) 274–280. [PMID: 7500951]
4.  Liu, P., Mehn, M.P., Yan, F., Zhao, Z., Que, L., Jr. and Liu, H.W. Oxygenase activity in the self-hydroxylation of (S)-2-hydroxypropylphosphonic acid epoxidase involved in fosfomycin biosynthesis. J. Am. Chem. Soc. 126 (2004) 10306–10312. [PMID: 15315444]
5.  Higgins, L.J., Yan, F., Liu, P., Liu, H.W. and Drennan, C.L. Structural insight into antibiotic fosfomycin biosynthesis by a mononuclear iron enzyme. Nature 437 (2005) 838–844. [PMID: 16015285]
6.  Cameron, S., McLuskey, K., Chamberlayne, R., Hallyburton, I. and Hunter, W.N. Initiating a crystallographic analysis of recombinant (S)-2-hydroxypropylphosphonic acid epoxidase from Streptomyces wedmorensis. Acta Crystallogr. Sect. F Struct. Biol. Cryst. Commun. 61 (2005) 534–536. [PMID: 16511089]
7.  Wang, C., Chang, W.C., Guo, Y., Huang, H., Peck, S.C., Pandelia, M.E., Lin, G.M., Liu, H.W., Krebs, C. and Bollinger, J.M., Jr. Evidence that the fosfomycin-producing epoxidase, HppE, is a non-heme-iron peroxidase. Science 342 (2013) 991–995. [PMID: 24114783]
[EC created 2011 as EC, transferred 2014 to EC]