Phospholipid composition and phospholipid asymmetry of ram spermatozoa plasma membranes |
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| Authors: | V T Hinkovska G P Dimitrov K S Koumanov |
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| Institution: | 1. Department of Food Science and Human Nutrition, College of Agriculture, Consumer and Environmental Sciences, University of Illinois, Urbana, IL, USA;2. Department of Food Science and Engineering, Faculty of Agricultural Engineering and Technology, University of Tehran, Karaj, Iran;3. School of Biology, College of Science, University of Tehran, Tehran, Iran;4. Nanobiomedicine Center of Excellence, Nanoscience and Nanotechnology Research Center, University of Tehran, Tehran, Iran;5. Center of Excellence for Application of Modern Technologies for Producing Functional Foods and Drinks, Iran;6. Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran;7. Department of Chemical and Bimolecular Engineering, School of Chemical Sciences, University of Illinois, Urbana, IL, USA |
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| Abstract: | The phospholipid composition of ram spermatozoa plasma membranes has been investigated. An exclusively high participation of the choline- and ethanolamine-plasmalogens in the phosphatidylcholine and phosphatidylethanolamine fractions has been established. Phosphatidylcholine of ram spermatozoa plasma membranes contains a great amount of polyunsaturated fatty acids. The phospholipid distribution in spermatozoa plasma membrane was investigated. It was established that the choline containing phospholipids are situated mainly in the outer membrane lipid monolayer, whereas diphosphatidylglycerol and phosphatidylserine are localized predominantly in the inner monolayer. The rest of the phospholipids are evenly distributed among the two monolayers. Ram spermal plasma membranes exhibit high phospholipase A2 activity. |
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