ExplorEnz: EC 1.14.16.5

Your query returned 1 entry. Printable version

1.14.16.5

Accepted name:

alkylglycerol monooxygenase

Reaction:

1-O-alkyl-sn-glycerol + a 5,6,7,8-tetrahydropteridine + O₂ = 1-O-(1-hydroxyalkyl)-sn-glycerol + a 4a-hydroxy-5,6,7,8-tetrahydropteridine

Other name(s):

glyceryl-ether monooxygenase; glyceryl-ether cleaving enzyme; glyceryl ether oxygenase; glyceryl etherase; O-alkylglycerol monooxygenase

Systematic name:

1-alkyl-sn-glycerol,tetrahydrobiopteridine:oxygen oxidoreductase

Comments:

The enzyme cleaves alkylglycerols, but does not cleave alkenylglycerols (plasmalogens). Requires non-heme iron [7], reduced glutathione and phospholipids for full activity. The product spontaneously breaks down to form a fatty aldehyde and glycerol. The co-product, 4a-hydroxytetrahydropteridine, is rapidly dehydrated to 6,7-dihydropteridine, either spontaneously or by EC 4.2.1.96, 4a-hydroxytetrahydrobiopterin dehydratase.

Links to other databases:

BRENDA, EXPASY, Gene, KEGG, MetaCyc, CAS registry number: 37256-82-9

References:

1.	Ishibashi, T. and Imai, Y. Solubilization and partial characterization of alkylglycerol monooxygenase from rat liver microsomes. Eur. J. Biochem. 132 (1983) 23–27. [DOI] [PMID: 6840084]
2.	Pfleger, E.C., Piantadosi, C. and Snyder, F. The biocleavage of isomeric glyceryl ethers by soluble liver enzymes in a variety of species. Biochim. Biophys. Acta 144 (1967) 633–648. [DOI] [PMID: 4383918]
3.	Snyder, F., Malone, B. and Piantadosi, C. Tetrahydropteridine-dependent cleavage enzyme for O-alkyl lipids: substrate specificity. Biochim. Biophys. Acta 316 (1973) 259–265. [DOI] [PMID: 4355017]
4.	Soodsma, J.F., Piantadosi, C. and Snyder, F. Partial characterization of the alkylglycerol cleavage enzyme system of rat liver. J. Biol. Chem. 247 (1972) 3923–3929. [PMID: 4402391]
5.	Tietz, A., Lindberg, M. and Kennedy, E.P. A new pteridine-requiring enzyme system for the oxidation of glyceryl ethers. J. Biol. Chem. 239 (1964) 4081–4090. [PMID: 14247652]
6.	Taguchi, H. and Armarego, W.L. Glyceryl-ether monooxygenase [EC 1.14.16.5]. A microsomal enzyme of ether lipid metabolism. Med. Res. Rev. 18 (1998) 43–89. [DOI] [PMID: 9436181]
7.	Watschinger, K., Keller, M.A., Hermetter, A., Golderer, G., Werner-Felmayer, G. and Werner, E.R. Glyceryl ether monooxygenase resembles aromatic amino acid hydroxylases in metal ion and tetrahydrobiopterin dependence. Biol. Chem. 390 (2009) 3–10. [DOI] [PMID: 19007315]
8.	Werner, E.R., Hermetter, A., Prast, H., Golderer, G. and Werner-Felmayer, G. Widespread occurrence of glyceryl ether monooxygenase activity in rat tissues detected by a novel assay. J. Lipid Res. 48 (2007) 1422–1427. [DOI] [PMID: 17303893]

[EC 1.14.16.5 created 1972 as EC 1.14.99.17, transferred 1976 to EC 1.14.16.5, modified 2010, modified 2020]