Encephalomyocarditis virus 2C protein antagonizes interferon-ß signaling pathway through interaction with MDA5.
Antiviral Res
; 161: 70-84, 2019 01.
Article
en En
| MEDLINE
| ID: mdl-30312637
ABSTRACT
Encephalomyocarditis virus (EMCV) is one of the most important picornavirus. It infects many mammalian species and causes encephalitis, myocarditis, neurologic diseases, diabetes and reproductive disorders in pigs. And it evolves mechanisms for escaping innate immune responses. But the viral pathogenesis has not been understood completely. In this study, we firstly found that EMCV protein 2C is a strong IFN-ß antagonist that interacts with MDA5 to inhibit induction of the IFN-ß signal pathway. The mutations in amino acid residue V26 of 2C decrease the inhibition of IFN-ß promoter activity and lost the ability to interact with MDA5, compared with wild type 2C protein. The rescued viruses with mutations in 2C (rV26A and rK25-3A) induced significantly higher IFN-ß mRNA and protein levels in PK-15, HEK-293A and N2a cells, compared to wild type EMCV and the repaired viruses rV26A(R) and rK25-3A(R). These data indicate that the amino acid residue V26 of EMCV 2C plays important roles in inhibiting type I IFN production by interacting with MDA5.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Transducción de Señal
/
Proteínas Portadoras
/
Interferón beta
/
Proteínas no Estructurales Virales
/
Virus de la Encefalomiocarditis
/
Helicasa Inducida por Interferón IFIH1
Límite:
Humans
Idioma:
En
Revista:
Antiviral Res
Año:
2019
Tipo del documento:
Article
País de afiliación:
China