Objectif Vaccinia virus (VACV), the prototypic poxvirus, is a large, enveloped, DNA virus characterized by its cytoplasmic site of replication and large subset of genes. Due to the complexity of VACV, the majority of studies focus on the virus rather than the host cell. Thus the repertoire of cell factors and functions required for its replication remain largely unknown. Our previous work to define a subset of these, revealed the cellular degradation machinery as a key requirement of VACV replication. Our findings indicated that ubiquitin (Ub), Ub ligase activity, and proteasome-mediated degradation are required for multiple stages of the virus lifecycle. The aim of this proposal is to reveal how VACV differentially modulates or takes advantage of the Ub proteasome system during genome uncoating, the initiation of DNA replication, and the assembly of progeny virions. For genome uncoating we will characterize the spatial and temporal interactions between ubiquitinated viral proteins, proteasomes, the viral uncoating factor, and the viral genome that occur on cytoplasmic cores. To ascertain how Cullin-3 based ubiquitination and proteasome degradation facilitate the switch from uncoating to replication of the viral genome, we will identify the relevant Cullin-3 substrates in the context of a detailed characterization of viral replication initiation sites. Coming full circle, we will explore the mechanisms used by VACV to modulate cellular degradation such that ubiquitinated viral core proteins are packaged into newly forming virions without being degraded. Using systems biology, virology, cell biology, biochemistry, molecular biology and a wide range of microscopy approaches we will unravel the complex interactions between poxviruses and the host cell degradation machinery. In turn, as viruses often serve as valuable tools to study cell function, this work is likely to uncover new insights into how cells spatially and temporally regulate their own degradative capacities. Champ scientifique natural sciencesbiological sciencesmicrobiologyvirologynatural sciencesphysical sciencesopticsmicroscopysuper resolution microscopynatural sciencesbiological sciencescell biologynatural sciencesbiological sciencesgeneticsgenomesviral genomesmedical and health scienceshealth sciencesinfectious diseasesDNA viruses Programme(s) H2020-EU.1.1. - EXCELLENT SCIENCE - European Research Council (ERC) Main Programme Thème(s) ERC-CoG-2014 - ERC Consolidator Grant Appel à propositions ERC-2014-CoG Voir d’autres projets de cet appel Régime de financement ERC-COG - Consolidator Grant Institution d’accueil THE UNIVERSITY OF BIRMINGHAM Contribution nette de l'UE € 516 178,75 Adresse Edgbaston B15 2TT Birmingham Royaume-Uni Voir sur la carte Région West Midlands (England) West Midlands Birmingham 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 € 516 178,75 Bénéficiaires (2) Trier par ordre alphabétique Trier par contribution nette de l'UE Tout développer Tout réduire THE UNIVERSITY OF BIRMINGHAM Royaume-Uni Contribution nette de l'UE € 516 178,75 Adresse Edgbaston B15 2TT Birmingham Voir sur la carte Région West Midlands (England) West Midlands Birmingham 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 € 516 178,75 UNIVERSITY COLLEGE LONDON Participation terminée Royaume-Uni Contribution nette de l'UE € 1 753 821,25 Adresse GOWER STREET WC1E 6BT London Voir sur la carte Région London Inner London — West Camden and City of London 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 € 1 753 821,25