Objectif "Type II secretion in Gram-negative bacteria is the general exit route for proteins that function outside the cell. During secretion, preproteins are first translocated across the inner membrane, after which the dedicated type II secretion system transports the protein across the outer membrane. In Klebsiella oxytoca the outer membrane pore is formed upon dodecamerisation of PulD, a founder member of the secretin superfamily. The minimal assembly unit of PulD, comprising the transmembrane C-domain preceded by part of the periplasmic N-domain and a short PulS-interaction domain at its C-terminus, assembles spontaneously with high efficiency in vitro in liposomes. The current proposal is aimed at elucidating the folding and assembly mechanism of the minimal PulD dodecamer in vitro. Using a combined approach of mutagenesis and variation of the lipid membrane environment it aims to isolate folding intermediate states along the pathway to the native state. Each intermediate will be characterised structurally by applying a wide range of biophysical and biochemical techniques. Together, these efforts will contribute to our understanding of how sequence determines structure in membrane proteins in the context of a lipid bilayer and at expanding the emerging field of membrane protein folding into more complex systems." Champ scientifique natural sciencesbiological sciencesmicrobiologybacteriologynatural sciencesbiological sciencesbiochemistrybiomoleculeslipidsnatural sciencesbiological sciencesbiochemistrybiomoleculesproteinsprotein folding Programme(s) FP7-PEOPLE - Specific programme "People" implementing the Seventh Framework Programme of the European Community for research, technological development and demonstration activities (2007 to 2013) Thème(s) FP7-PEOPLE-2010-IEF - Marie-Curie Action: "Intra-European fellowships for career development" Appel à propositions FP7-PEOPLE-2010-IEF Voir d’autres projets de cet appel Régime de financement MC-IEF - Intra-European Fellowships (IEF) Coordinateur INSTITUT PASTEUR Contribution de l’UE € 185 748,00 Adresse RUE DU DOCTEUR ROUX 25-28 75724 Paris France Voir sur la carte Région Ile-de-France Ile-de-France Paris Type d’activité Research Organisations Contact administratif Nadia Khelef (Dr.) Liens Contacter l’organisation Opens in new window Site web Opens in new window Coût total Aucune donnée