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Molecular models for murine sperm-egg binding Clark GF; Dell AJ Biol Chem 2006[May]; 281 (20): 13853-6Murine sperm initiate fertilization by binding to the specialized extracellular matrix of mouse eggs, known as the zona pellucida. Over the past decade, powerful genetic, biophysical, and biochemical techniques have been employed to gain new insights into this interaction. Evidence from these studies does not support either of two major models for binding first proposed over two decades ago. Two more recently established models suggest that protein-protein interactions predominate during this initial stage of fertilization. Another model proposes that about 75-80% of the murine sperm bound to zona pellucida under well defined in vitro conditions is carbohydrate dependent, with the remaining sperm bound via protein-protein interactions. Mounting evidence suggests that the carbohydrate sequences coating the murine egg could be employed as specific immune recognition markers. Continued investigation of this system may resolve many of these controversial findings and reveal novel functions for murine zona pellucida glycoproteins.|*Sperm-Ovum Interactions[MESH]|Animals[MESH]|Carbohydrates/chemistry[MESH]|Cell Adhesion[MESH]|Female[MESH]|Fertilization[MESH]|Male[MESH]|Mice[MESH]|Models, Biological[MESH]|Models, Molecular[MESH]|Rabbits[MESH]|Zona Pellucida/chemistry[MESH] |
