Project description
Untangling enterovirus replication and release pathways
Enteroviruses cause many diseases, from the common cold to myocarditis and poliomyelitis. They do this by altering the cytoplasm of host cells to create organelles for efficient viral genome replication and by using the cell’s secretory autophagy pathway for replication and release of the virus. Recent work has highlighted some of the structures involved in this process, including viral ATPase 2C, a potential tether associated with a replication organelle’s membrane and filament proteins carried by some autophagosomes. With the support of the Marie Skłodowska-Curie Actions programme, the EnteroInfection project aims to investigate the role of 2C and filament proteins in enterovirus replication with a focus on the viruses causing myocarditis and poliomyelitis.
Objective
Enteroviruses (EVs) are positive-sense, single stranded RNA virus from the Picornaviridae family. With 106 types, they can cause mild to severe diseases in human, especially children, such as common cold (Rhinovirus), myocarditis (Coxsackievirus B3, CVB3) or poliomyelitis (Poliovirus, PV). EVs are known to remodel the cytoplasm of host cells to create replication organelles allowing efficient viral genome replication. They also hijack the secretory autophagy pathway for replication and viral release. Recent cryo-electron tomography (cryo-ET) work done in the Carlson lab has highlight that PV virions directly assemble on replication membrane through a tethering complex where the tether is thought to be viral ATPase 2C. Moreover, they were able to show one class of autophagosomes is carrying bundles of filament proteins, suspected as filamentous actin (F-actin). My project will address two questions in EV replication: (i) how does the viral protein 2C assist membrane-localized assembly? (ii) what is the identity and role of the filaments in virus-induced autophagy? I will use an integrative approach of cell biology, biochemistry and structural biology and PV and CVB3 will be used as model viruses for this project. I first aim to characterize the viral assembly complex by in vitro reconstitution of the interaction between model membranes, purified 2C, capsid proteins and RNA through cross-linking mass spectrometry (XL-MS) and cryo-ET. By combining focus-ion-beam (FIB) milling and cryo-ET to perform subtomogram averaging, I will study the structure of the tethering complex and the one of the filament proteins found in autophagosomes of infected cells. In parallel, to aid the identification of the filament, I will perform proteomic studies through MS study on isolated autophagosomes infected cells. Finally, combined with knock-out cells, I will be able to identify potential protein candidates and test their effect on EV infection through cryo-ET and live cell imaging.
Fields of science (EuroSciVoc)
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
- medical and health sciences health sciences infectious diseases viral diseases RNA viruses
- natural sciences biological sciences biochemistry biomolecules proteins
- natural sciences biological sciences genetics genomes viral genomes
- natural sciences physical sciences optics microscopy electron microscopy
- natural sciences biological sciences molecular biology structural biology
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Keywords
Project’s keywords as indicated by the project coordinator. Not to be confused with the EuroSciVoc taxonomy (Fields of science)
Project’s keywords as indicated by the project coordinator. Not to be confused with the EuroSciVoc taxonomy (Fields of science)
Programme(s)
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
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HORIZON.1.2 - Marie Skłodowska-Curie Actions (MSCA)
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Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
Funding Scheme
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Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
HORIZON-TMA-MSCA-PF-EF - HORIZON TMA MSCA Postdoctoral Fellowships - European Fellowships
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Call for proposal
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Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
(opens in new window) HORIZON-MSCA-2023-PF-01
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Net EU financial contribution. The sum of money that the participant receives, deducted by the EU contribution to its linked third party. It considers the distribution of the EU financial contribution between direct beneficiaries of the project and other types of participants, like third-party participants.
901 87 UMEA
Sweden
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