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Shinji H, Sasaki N, Hamim I, Itoh Y, Taku K, Hayashi Y, Minato N, Moriyama H, Arie T, Komatsu K. Dynamin-related protein 2 interacts with the membrane-associated methyltransferase domain of plantago asiatica mosaic virus replicase and promotes viral replication. Virus Res 2023; 331:199128. [PMID: 37149224 DOI: 10.1016/j.virusres.2023.199128] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Revised: 05/02/2023] [Accepted: 05/03/2023] [Indexed: 05/08/2023]
Abstract
Positive-strand RNA viruses replicate their RNA in the viral replication complex, a spherical structure formed by remodeling of host intracellular membranes. This process also requires the interaction between viral membrane-associated replication proteins and host factors. We previously identified the membrane-associated determinant of the replicase of plantago asiatica mosaic virus (PlAMV), a positive-strand RNA virus of the genus Potexvirus, in its methyltransferase (MET) domain, and suggested that its interaction with host factors is required to establish viral replication. Here we identified Nicotiana benthamiana dynamin-related protein 2 (NbDRP2) as an interactor of the MET domain of the PlAMV replicase by co-immunoprecipitation (Co-IP) and mass spectrometry analysis. NbDRP2 is closely related to the DRP2 subfamily proteins in Arabidopsis thaliana, AtDRP2A and AtDRP2B. Confocal microscopy observation and Co-IP confirmed the interaction between the MET domain and NbDRP2. Also, the expression of NbDRP2 was induced by PlAMV infection. PlAMV accumulation was reduced when the expression of NbDRP2 gene was suppressed by virus-induced gene silencing. In addition, PlAMV accumulation was reduced in protoplasts treated with dynamin inhibitor. These results indicate a proviral role of the interaction of NbDRP2 with the MET domain in PlAMV replication.
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Affiliation(s)
- H Shinji
- Graduate School for Agriculture, Tokyo University of Agriculture and Technology (TUAT), Tokyo 183-8509, Japan.
| | - N Sasaki
- Graduate School for Agriculture, Tokyo University of Agriculture and Technology (TUAT), Tokyo 183-8509, Japan
| | - I Hamim
- Department of Plant Pathology, Bangladesh Agricultural University, Mymensingh 2202, Bangladesh; International Research Fellow, Japan Society for the Promotion of Science, Tokyo 102-0083, Japan
| | - Y Itoh
- Smart-Core-Facility Promotion Organization, Tokyo University of Agriculture and Technology (TUAT), Tokyo 183-8509, Japan
| | - K Taku
- Graduate School for Agriculture, Tokyo University of Agriculture and Technology (TUAT), Tokyo 183-8509, Japan
| | - Y Hayashi
- Graduate School for Agriculture, Tokyo University of Agriculture and Technology (TUAT), Tokyo 183-8509, Japan
| | - N Minato
- Institute of Science and Technology, Niigata University, Niigata 950-2181 Japan
| | - H Moriyama
- Graduate School for Agriculture, Tokyo University of Agriculture and Technology (TUAT), Tokyo 183-8509, Japan
| | - T Arie
- Graduate School for Agriculture, Tokyo University of Agriculture and Technology (TUAT), Tokyo 183-8509, Japan
| | - K Komatsu
- Graduate School for Agriculture, Tokyo University of Agriculture and Technology (TUAT), Tokyo 183-8509, Japan
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