The multifaceted role of the viral 2A protease in enterovirus replication and antagonism of host antiviral responses.

ABSTRACT: 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 translat

SUBMITTER: Schipper JG 

PROVIDER: S-EPMC12410887 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature