Objectif Correct positioning of the division plane is essential for the generation of normal offspring. In Caulobacter crescentus, the spatiotemporal control of cell division is mediated by MipZ, a conserved P-loop ATPase forming bipolar gradients with a concentration minimum at the cell centre. Antagonizing the polymerization of the essential divisome component FtsZ, MipZ inhibits divisome assembly near the poles, thereby limiting cytokinesis to midcell. Gradient formation involves a dynamic localization cycle, in which freely diffusible MipZ monomers interact with polar complexes of the centromere-binding protein ParB and then dimerize in an ATP-dependent manner. Dimers dissociate from ParB and are immobilized within the cell through non-specific interaction with chromosomal DNA. Spontaneous ATP hydrolysis triggers disassembly of the complex, releasing MipZ monomers that are recaptured by ParB. How ParB stimulates dimer formation and how DNA-bound dimers inhibit FtsZ assembly is still unknown. We will address these questions by characterizing previously isolated MipZ mutants with FtsZ/ParB interaction defects, using a combination of fluorescence microscopy, two-hybrid analysis, biochemistry, and biophysical techniques such as surface plasmon resonance, microscale thermophoresis or hydrogen-deuterium-exchange mass spectrometry. We will also use synthetic biological and modelling approaches to rebuild the system in a simplistic form to thus gain in-depth knowledge of the function of the different elements. Champ scientifique natural sciencesbiological sciencesmicrobiologybacteriologynatural sciencesbiological sciencesgeneticsDNAnatural sciencesbiological sciencesbiochemistrybiomoleculesproteinsnatural sciencesphysical sciencesopticsmicroscopynatural scienceschemical sciencesorganic chemistryamines Programme(s) H2020-EU.1.3. - EXCELLENT SCIENCE - Marie Skłodowska-Curie Actions Main Programme H2020-EU.1.3.2. - Nurturing excellence by means of cross-border and cross-sector mobility Thème(s) MSCA-IF-2014-EF - Marie Skłodowska-Curie Individual Fellowships (IF-EF) Appel à propositions H2020-MSCA-IF-2014 Voir d’autres projets de cet appel Régime de financement MSCA-IF-EF-ST - Standard EF Coordinateur PHILIPPS UNIVERSITAET MARBURG Contribution nette de l'UE € 159 460,80 Adresse BIEGENSTRASSE 10 35037 Marburg Allemagne Voir sur la carte Région Hessen Gießen Marburg-Biedenkopf Type d’activité Higher or Secondary Education Establishments Liens Contacter l’organisation Opens in new window Site web Opens in new window Participation aux programmes de R&I de l'UE Opens in new window Réseau de collaboration HORIZON Opens in new window Coût total € 159 460,80
