Reaction: 6-(α-D-glucosaminyl)-1-phosphatidyl-1D-myo-inositol + H2O = 6-(α-D-glucosaminyl)-1D-myo-inositol + 3-sn-phosphatidate
For diagram click here.
Other name(s): GPI-PLD; glycoprotein phospholipase D; phosphatidylinositol phospholipase D; phosphatidylinositol-specific phospholipase D
Systematic name: glycoprotein-phosphatidylinositol phosphatidohydrolase
Comments: This enzyme is also active when O-4 of the glucosamine is substituted by carrying the oligosaccharide that can link a protein to the structure. It therefore cleaves proteins from the lipid part of the glycosylphosphatidylinositol (GPI) anchors, but does so by hydrolysis, whereas glycosylphosphatidylinositol diacylglycerol-lyase (EC 18.104.22.168) does so by elimination. It acts on plasma membranes only after solubilization of the substrate with detergents or solvents, but it may act on intracellular membranes.
Links to other databases: BRENDA, EXPASY, KEGG, Metacyc, CAS registry number: 113756-14-2
1. Low, M.G. and Prasad, A.R.S. A phospholipase D specific for the phosphatidylinositol anchor of cell-surface proteins is abundant in plasma. Proc. Natl. Acad. Sci. USA 85 (1988) 980-984. [PMID: 3422494]
2. Malik, A.-S. and Low, M.G. Conversion of human placental alkaline phosphatase from a high Mr form to a low Mr form during butanol extraction. An investigation of the role of endogenous phosphoinositide-specific phospholipases. Biochem. J. 240 (1986) 519-527. [PMID: 3028377]
3. Li, J.Y., Hollfelder, K., Huang, K.S. and Low, M.G. Structural features of GPI-specific phospholipase D revealed by fragmentation and Ca2+ binding studies. J. Biol. Chem. 269 (1994) 28963-28971. [PMID: 7961859]
4. Deeg, M.A,, Vierman, E.L. and Cheung, M.C. GPI-specific phospholipase D associates with an apoA-I- and apoA-IV-containing complex. J. Lipid Res. 42 (2001) 442-451. [PMID: 11254757]