Abstract
Phospholipase D is an important enzyme in signal transduction in neuronal tissue. A variety of assays have been used to measure phospholipase D activity in vitro. The most typical measure of phospholipase D activity is the production of phosphatidylethanol in the presence of ethanol. Phosphatidylethanol is a product of transphosphatidylation activity that is considered a unique property of phospholipase D. To support transphosphatidylation activity, high concentrations of ethanol may be required. Furthermore, most assays in the literature utilize a detergent. These extreme conditions, detergent and ethanol, may alter phospholipase D and hinder the study of its regulation. In this manuscript we describe an assay that eliminates these potentially confounding conditions. It utilizes high specific activity [3H]butanol as a nucleophilic receptor. This eliminates the need for high concentrations of alcohol. The substrate is an analog of phosphatidylcholine that contains short-chain fatty acids, 1,2-dioctanoyl-sn-glycero-3-phosphocholine. Phospholipase D readily hydrolyzes this substrate in the absence of detergent. This novel assay should be useful in the further characterization of phospholipase D.
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Abbreviations
- CMC:
-
critical micellar concentration
- K M :
-
Michaelis constant
- PC8:
-
1,2-dioctanoyl-sn-glycero-3-phosphocholine
References
Billah, M.M., and Anthes, J.C. (1990) The Regulation and Cellular Functions of Phosphatidylcholine Hydrolysis, Biochem. J. 269, 181–291.
Exton, J.H. (1990) Signaling Through Phosphatidylcholine Breakdown, J. Biol. Chem. 265, 1–4.
Shukla, S., and Halenda, S. (1991) Phospholipase D in Cell Signaling and Its Relationship to Phospholipase C, Life Sci. 48, 851–866.
Holbrook, P.G., Pannell, L.K., Mirata, Y., and Daly, J.W. (1992) Molecular Species Analysis of a Product of Phospholipase D Activation. Phosphatidylethanol Is Formed from Phosphatidylcholine in Phorbol Ester- and Bradykinin-Stimulated Cells, J. Biol. Chem. 267, 16834–16840.
Horwitz, J., and Davis, L.L. (1993) The Substrate Specificity of Brain Microsomal Phospholipase D, Biochem. J. 295, 793–798.
Kobayashi, M., and Kanfer, J.N. (1987) Phosphatidylethanol Formation via Transphosphatidylation by Rat Brain Synaptosomal Phospholipase D, J. Neurochem. 48, 1597–1603.
Mohn, H., Chalifa, V., and Liscovitch, M. (1992) Substrate Specificity of Neutral Phospholipase D from Rat Brain Studied by Selective Labeling of Endogenous Synaptic Membrane Phospholipid In Vitro, J. Biol. Chem. 267, 11131–11136.
Wang, P., Anthes, J.C., Siegel, M.I., Egan, R.W., and Billah, M.M. (1991) Existence of Cytosolic Phospholipase D. Identification and Comparison with Membrane Bound Enzyme, J. Biol. Chem. 266, 14877–14880.
Nishida, A., Shimizu, M., Kanaho, Y., Nozawa, Y., and Yamawaki, S. (1992) Characterization of Phospholipase D in a Cell-Free System of Cultured Cells Derived from Rat Frontal Cortex, Brain Res. 595, 12–16.
Heller, M. (1978) Phospholipase D, Adv. Lipid Res. 16, 267–326.
Liscovitch, M. (1989) Phosphatidylethanol Biosynthesis in Ethanol-Exposed NG108-15 Neuroblastoma X Glioma Hybrid Cells, J. Biol. Chem. 254, 1450–1456.
Horwitz, J. (1991) Bradykinin Activates a Phospholipase D That Hydrolyzes Phosphatidylcholine in PC12 Cells, J. Neurochem. 56, 509–517.
Kobayashi, M., McCartney, D.G., and Kanfer, J.N. (1988) Developmental Changes and Regional Distribution of Phospholipase D and Base Exchange Enzyme Activities in Rat Brain, Neurochem. Res. 13, 771–776.
Tausk, R.J., Oudshoorn, C., and Overbrook, J.T.G. (1974) Physical Chemical Studies of Short-Chain Lecithin Homologues. 3. Phase Separation and Light Scattering Studies on Aqueous Dioctanoyllecithin Solutions. Biophys. Chem. 2, 53–63.
Roberts, M.F., Bothner-By, A.A., and Dennis, E.A. (1978) Magnetic Nonequivalence Within Fatty Acyl Chains of Phospholipids in Membrane Models: 1H Nuclear Magnetic Resonance Studies of the Alpha-Methylene Groups, Biochemistry 17, 935–942.
Burns, R.A., Donovan, J.M., and Roberts, M.F. (1983) Structural Analysis of Short-Chain Lecithin/Triglyceride Micellar Particles, Biochemistry 22, 964–973.
Chalifa, V., Mohn, H., and Liscovitch, M. (1990) A Neutral Phospholipase D Activity from Rat Brain Synaptic Plasma Membranes. Identification and Partial Characterization. J. Biol. Chem. 265, 17512–17519.
Kanoh, H., Kanaho, Y., and Nozawa, Y. (1991) Activation and Solubilization by Triton X-100 of Membrane-Bound Phospholipase D of Rat Brain, Lipids 26, 426–430.
Kanfer, J.N., and McCartney, D. (1994) Phospholipase D Activity of Isolated Rat Brain Plasma Membranes, FEBS Lett. 337, 251–254.
Liscovitch, M., and Eli, Y. (1991) Ca2+ Inhibits Guanine Nucleotide-Activated Phospholipase D in Neural-Derived NG108-15 Cells, Cell Reg. 2, 1011–1019.
Okamura, S., and Yamashita, S. (1994) Purification and Characterization of Phosphatidylcholine Specific Phospholipase D from Pig Lung, J. Biol. Chem. 269, 31207–31213.
Liscovitch, M., Chalifa, V., Pertiles, P., Chen, C.-S., and Cantley, L.C. (1994) Novel Function of Phosphatidylinositol 4,5-Bisphosphate as a Cofactor for Brain Membrane Phospholipase D, J. Biol. Chem. 269, 21403–21406.
Waksman, M., Eli, Y., Liscovitch, M., and Gerst, J.E. (1996) Identification and Characterization of a Gene Encoding Phospholipase D Activity in Yeast, J. Biol. Chem. 271, 2361–2364.
Vinggard, A.N., Jensen, T., Morgan, C.P., Cockcroft, S., and Hansen, H.S. (1996) Didecanoyl Phosphatidylcholine Is a Superior Substrate for Assaying Mammalian Phospholipase D, Biochem. J. 319, 861–864.
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Davis, L.L., Maglio, J.J. & Horwitz, J. Phospholipase D hydrolyzes short-chain analogs of phosphatidylcholine in the absence of detergent. Lipids 33, 223–227 (1998). https://doi.org/10.1007/s11745-998-0199-5
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DOI: https://doi.org/10.1007/s11745-998-0199-5