Abstract
Vimentin, a member of intermediate filaments, has been documented to be involved in viral infections. Despite several studies focusing on its involvement in porcine reproductive and respiratory syndrome virus (PRRSV) infection, the detailed mechanisms by which vimentin takes effect remain to be fully elucidated. In the present study, we identified a previously unrecognized role of vimentin rearrangement in PRRSV replication. We monitored that PRRSV infection induced vimentin reorganization during post-entry stage, which was beneficial for viral replication. In detail, the serine residue of vimentin was phosphorylated at position 38 (Ser38) by calcium calmodulin-dependent protein kinase II gamma (CaMKIIγ), and vimentin filaments reorganized into cage-like structures enwrapping PRRSV replication complex (RC) at the perinuclear location. Taken together, these results expand the knowledge of PRRSV replication, and provide novel targets for prevention and control of PRRSV.
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