The multifaceted role of the viral 2A protease in enterovirus replication and antagonism of host antiviral responses
Enteroviruses dramatically remodel the cellular infrastructure for efficient replication and curtailing host antiviral responses. The roles of viral proteins in these processes have been studied mostly in vitro, by ectopic overexpression, or by surrogate infection systems, all of which have shortcomings. Here, we replace the essential 2A cleavage site at the P1-P2 junction with an internal ribosome entry site (IRES), 3CD cleavage site, or T2A sequence, allowing us to catalytically inactivate 2Apro in the virus context. Viruses with an inactive 2Apro are hampered in replication in cell lines and are severely attenuated in a Coxsackievirus B3 (CVB3) mouse pancreatitis infection model. We show that 2Apro is essential for disturbing nucleocytoplasmic transport, shutting down host mRNA translation, suppressing stress granule formation, suppressing the induction of the IFN response, and overcoming IFN-induced restriction factors. Moreover, using an advanced single-molecule live cell imaging approach, we reveal that 2Apro is important for the initial round of replication of the incoming viral RNA, which is a bottleneck for efficient infection. Thus, 2Apro plays a critical role in subverting antiviral responses and establishing a favorable environment to expedite enterovirus replication.
Authors
- Judith M. A. van den Brand (ORCID: https://orcid.org/0000-0001-8420-5406)
- Arno L. W. van Vliet
- Kimberly M. Bonger (ORCID: https://orcid.org/0000-0001-9498-2620)
- Frank J. M. van Kuppeveld (ORCID: https://orcid.org/0000-0001-5800-749X)
- Jelle G. Schipper
- Lucas J. M. Bruurs
- Richard Wubbolts (ORCID: https://orcid.org/0000-0001-8661-7594)
- Marvin E. Tanenbaum (ORCID: https://orcid.org/0000-0001-8762-0090)
- Chiara Aloise
- Sereina O. Sutter (ORCID: https://orcid.org/0000-0002-1563-1038)
- Rana Abdelnabi (ORCID: https://orcid.org/0000-0001-9771-7312)
- Hendrik Jan Thibaut (ORCID: https://orcid.org/0000-0001-5785-8276)
- Marleen Zwaagstra (ORCID: https://orcid.org/0000-0002-6774-1503)
- Bob J. Ignacio (ORCID: https://orcid.org/0009-0008-0614-0086)
- Johan Neyts (ORCID: https://orcid.org/0000-0002-0033-7514)
- Dagmar Roelofs
Institutions
- Radboud University Nijmegen (NL)
- University of Applied Sciences Utrecht (NL)
- Utrecht University (NL)
- Rega Institute for Medical Research (BE)
- University Medical Center Utrecht (NL)
- Synthon (Netherlands) (NL)
- Oncode Institute (NL)
- Delft University of Technology (NL)
Publication Details
- Journal
- PLoS Pathogens
- Published
- 2025-08-28
- DOI
- https://doi.org/10.1371/journal.ppat.1013443
- Citations
- 3
- Primary Topic
- Viral Infections and Immunology Research
- Type
- article
- Field-Weighted Citation Impact
- 4.16
Funders
- Australian Government
- Belgische Federale Overheidsdiensten
- European Commission
- Universiteit Utrecht
- Nederlandse Organisatie voor Wetenschappelijk Onderzoek
- Oncode Institute
- Horizon 2020 Framework Programme
- HORIZON EUROPE Marie Sklodowska-Curie Actions
- HORIZON EUROPE European Research Council