Deng T, Du L, Ding S, Peng X, Chen W, Yan Y, Hu B, Zhou J. Protein kinase Cdc7 supports viral replication by phosphorylating
Avibirnavirus VP3 protein.
J Virol 2023;
97:e0112523. [PMID:
37902398 PMCID:
PMC10688373 DOI:
10.1128/jvi.01125-23]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Accepted: 09/21/2023] [Indexed: 10/31/2023] Open
Abstract
IMPORTANCE
The Avibirnavirus infectious bursal disease virus is still an important agent which largely threatens global poultry farming industry economics. VP3 is a multifunctional scaffold structural protein that is involved in virus morphogenesis and the regulation of diverse cellular signaling pathways. However, little is known about the roles of VP3 phosphorylation during the IBDV life cycle. In this study, we determined that IBDV infection induced the upregulation of Cdc7 expression and phosphorylated the VP3 Ser13 site to promote viral replication. Moreover, we confirmed that the negative charge addition of phosphoserine on VP3 at the S13 site was essential for IBDV proliferation. This study provides novel insight into the molecular mechanisms of VP3 phosphorylation-mediated regulation of IBDV replication.
Collapse