AI Article Synopsis
- The nucleocapsid (N) protein of porcine epidemic diarrhea virus (PEDV) enhances the translation of both viral genomic RNA (gRNA) and messenger RNA, though its precise role is still being studied.
- The N-terminal domain (NTD) and Linker region of the N protein are crucial for increasing gRNA translation, along with specific elements in the 5' and 3' untranslated regions (UTR).
- Akt1, a signaling kinase, boosts viral gRNA translation linked to the N protein, but its effect occurs independently of a direct interaction between Akt1 and the N protein.
Article Abstract
The role of coronaviral nucleocapsid (N) protein in regulating viral translation remains poorly understood. Here, we showed that the N protein of porcine epidemic diarrhea virus (PEDV) enhances the translation of both virus-like genomic RNA (gRNA) and messenger RNA. Further characterization of the gRNA translation upregulation showed that the N-terminal domain (NTD) + Linker region plays a major role. The stem-loop 1 in the 5' untranslated region (UTR) and the budged stem loop in the 3'UTR are required for viral translation upregulation by PEDV N protein. The signaling kinase Akt exists in three isoforms. We found that Akt1 enhances viral gRNA translation upregulation by the N protein dependent on its kinase activity. We further showed an interaction between Akt1 and PEDV N, that is abolished by the NTD + Linker region. This suggested that the enhancing effect of Akt1 on translation upregulation by the N protein does not require interaction between these two proteins.
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| http://dx.doi.org/10.1016/j.virol.2024.110306 | DOI Listing |
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