Viruses, Volume 17, Issue 12
2025 December - 119 articles
Cover Story: Chikungunya virus (CHIKV) is a re-emerging alphavirus responsible for outbreaks of acute and chronic arthritic disease worldwide. Despite progress in vaccine development, no licensed CHIKV vaccines or targeted antivirals are currently available. Replication of the CHIKV RNA genome requires the coordinated action of nonstructural proteins, including the RNA-dependent RNA polymerase nsP4, whose regulation remains poorly defined. In this study, we identify a minimal, functional precursor of nsP4 derived from the nsP3–nsP4 polyprotein that supports RNA replication in a cell-based replicon system. Our findings reveal a previously unappreciated role of precursor processing and spatial regulation in polymerase activation and provide a tractable framework for dissecting alphavirus replicase assembly and control. View this paper - Issues are regarded as officially published after their release is announced to the table of contents alert mailing list .
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