Objectif For all sexually reproducing organisms fertilisation is a fundamental step to ensure the continuity of the species. The events that take place during fertilisation are poorly understood at the molecular level, although a number of components that play crucial roles in this process have been identified in mammals. The mammalian oocyte is surrounded by the zona pellucida (ZP), a specialised extra-cellular matrix consisting of filaments of polymerised ZP domain proteins. Some of these ZP domain proteins serve a s species-specific receptors for the initial recognition of sperm. Upon fusion of the gametes, modification of ZP subunits leads to morphological changes of the whole matrix that inactivate its receptor activity as part of the block against the entry of additional sperm.The goal of this project is to determine the first three-dimensional structure of a ZP domain. So far, no structure is available for this conserved protein, which is thought to adopt a unique fold. Solving the structure would be of outmost importance for understanding the molecular mechanism of crucial steps of fertilisation. Since more than one hundred extra-cellular proteins with diverse functions contain ZP domains, a structure would have implications far beyond the field of fertilisation and it would allow detailed interpretation of the effect of the many ZP domain mutations that cause disease in humans. Champ scientifique natural sciencesearth and related environmental sciencesgeologymineralogycrystallographynatural sciencesbiological sciencesbiochemistrybiomoleculesproteinsnatural sciencesbiological sciencesgeneticsmutationnatural sciencesbiological scienceszoologymammalogy Mots‑clés X extracellular matrix ray crystallography Programme(s) FP6-MOBILITY - Human resources and Mobility in the specific programme for research, technological development and demonstration "Structuring the European Research Area" under the Sixth Framework Programme 2002-2006 Thème(s) MOBILITY-4.1 - Marie Curie European Reintegration Grants (ERG) Appel à propositions FP6-2004-MOBILITY-11 Voir d’autres projets de cet appel Régime de financement ERG - Marie Curie actions-European Re-integration Grants Coordinateur KAROLINSKA INSTITUTET Contribution de l’UE Aucune donnée Adresse Nobels vag 5 STOCKHOLM Suède Voir sur la carte Liens Site web Opens in new window Coût total Aucune donnée