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The nucleocapsid protein of rice stripe virus in cell nuclei of vector insect regulates viral replication
Protein & Cell ; (12): 360-378, 2022.
Artículo en Inglés | WPRIM | ID: wpr-929162
ABSTRACT
Rice stripe virus (RSV) transmitted by the small brown planthopper causes severe rice yield losses in Asian countries. Although viral nuclear entry promotes viral replication in host cells, whether this phenomenon occurs in vector cells remains unknown. Therefore, in this study, we systematically evaluated the presence and roles of RSV in the nuclei of vector insect cells. We observed that the nucleocapsid protein (NP) and viral genomic RNAs were partially transported into vector cell nuclei by utilizing the importin α nuclear transport system. When blocking NP nuclear localization, cytoplasmic RSV accumulation significantly increased. In the vector cell nuclei, NP bound the transcription factor YY1 and affected its positive regulation to FAIM. Subsequently, decreased FAIM expression triggered an antiviral caspase-dependent apoptotic reaction. Our results reveal that viral nuclear entry induces completely different immune effects in vector and host cells, providing new insights into the balance between viral load and the immunity pressure in vector insects.
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Texto completo: Disponible Índice: WPRIM (Pacífico Occidental) Asunto principal: Enfermedades de las Plantas / Oryza / Replicación Viral / Núcleo Celular / Proteínas de la Nucleocápside / Tenuivirus / Hemípteros / Insectos Vectores / Insectos Límite: Animales Idioma: Inglés Revista: Protein & Cell Año: 2022 Tipo del documento: Artículo

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Texto completo: Disponible Índice: WPRIM (Pacífico Occidental) Asunto principal: Enfermedades de las Plantas / Oryza / Replicación Viral / Núcleo Celular / Proteínas de la Nucleocápside / Tenuivirus / Hemípteros / Insectos Vectores / Insectos Límite: Animales Idioma: Inglés Revista: Protein & Cell Año: 2022 Tipo del documento: Artículo