Sterile 20-like kinase 3 promotes tick-borne encephalitis virus assembly by interacting with NS2A and prM and enhancing the NS2A-NS4A association.
J Med Virol
; 95(3): e28610, 2023 03.
Article
en En
| MEDLINE
| ID: mdl-36840407
ABSTRACT
Tick-borne encephalitis virus (TBEV) is the causative agent of a potentially fatal neurological infection in humans. Investigating virus-host interaction is important for understanding the pathogenesis of TBEV and developing effective antiviral drugs against this virus. Here, we report that mammalian ste20-like kinase 3 (MST3) is involved in the regulation of TBEV infection. The knockdown or knockout of MST3, but not other mammalian ste20-like kinase family members, inhibited TBEV replication. The knockdown of MST3 also significantly reduced TBEV replication in mouse primary astrocytes. Life cycle analysis indicated that MST3 remarkably impaired virion assembly efficiency and specific infectivity by respectively 59% and 95% in MST3-knockout cells. We further found that MST3 interacts with the viral proteins NS2A and prM; and MST3 enhances the interaction of NS2A-NS4A. Thus, MST3-NS2A complex plays a major role in recruiting prM-E heterodimers and NS4A and mediates the virion assembly. Additionally, we found that MST3 was biotinylated and combined with other proteins (e.g., ATG5, Sec24A, and SNX4) that are associated with the cellular membrane required for TBEV infection. Overall, our study revealed a novel function for MST3 in TBEV infection and identified as a novel host factor supporting TBEV assembly.
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Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Encefalitis Transmitida por Garrapatas
/
Virus de la Encefalitis Transmitidos por Garrapatas
Tipo de estudio:
Prognostic_studies
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Risk_factors_studies
Límite:
Animals
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Humans
Idioma:
En
Año:
2023
Tipo del documento:
Article