Abstract
We previously found that infection with human parainfluenza virus type 2 (hPIV-2), a member of the genus Orthorubulavirus, family Paramyxoviridae, causes filamentous actin (F-actin) formation to promote viral growth. In the present study, we investigated whether similar regulation of F-actin formation is observed in infections with other rubulaviruses, such as parainfluenza virus type 5 (PIV-5) and simian virus 41 (SV41). Infection with these viruses caused F-actin formation and RhoA activation, which promoted viral growth. These results indicate that RhoA-induced F-actin formation is important for efficient growth of these rubulaviruses. Only SV41 and hPIV-2 V and P proteins bound to Graf1, while the V and P proteins of PIV-5, mumps virus, and hPIV-4 did not bind to Graf1. In contrast, the V proteins of these rubulaviruses bound to both inactive RhoA and profilin 2. These results suggest that there are common and unique mechanisms involved in regulation of F-actin formation by members of the genus Orthorubulavirus.
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Acknowledgements
We acknowledge proofreading and editing by Benjamin Phillis, and statistical support by Dr. Toshio Shimokawa at the Clinical Study Support Center, Wakayama Medical University.
Funding
This work was supported by a Grant-in-Aid for Scientific Research from the Ministry of Education, Culture, Sports, Science and Technology, Japan (JP17K15703). This work was also supported by GSK Japan Research Grant 2018.
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Ohta, K., Matsumoto, Y. & Nishio, M. Common and unique mechanisms of filamentous actin formation by viruses of the genus Orthorubulavirus. Arch Virol 165, 799–807 (2020). https://doi.org/10.1007/s00705-020-04565-y
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DOI: https://doi.org/10.1007/s00705-020-04565-y