生物
细胞生物学
磷酸化
p38丝裂原活化蛋白激酶
信号转导
溶血磷脂酸
先天免疫系统
蛋白激酶A
病毒复制
趋化性
激酶
受体
免疫系统
病毒
病毒学
免疫学
生物化学
作者
Sushil Khatiwada,G. Delhon,Sabal Chaulagain,Daniel L. Rock
出处
期刊:PLOS Pathogens
[Public Library of Science]
日期:2021-10-06
卷期号:17 (10): e1009971-e1009971
被引量:2
标识
DOI:10.1371/journal.ppat.1009971
摘要
Viruses have evolved mechanisms to subvert critical cellular signaling pathways that regulate a wide range of cellular functions, including cell differentiation, proliferation and chemotaxis, and innate immune responses. Here, we describe a novel ORFV protein, ORFV113, that interacts with the G protein-coupled receptor Lysophosphatidic acid receptor 1 (LPA 1 ). Consistent with its interaction with LPA 1 , ORFV113 enhances p38 kinase phosphorylation in ORFV infected cells in vitro and in vivo , and in cells transiently expressing ORFV113 or treated with soluble ORFV113. Infection of cells with virus lacking ORFV113 (OV-IA82Δ113) significantly decreased p38 phosphorylation and viral plaque size. Infection of cells with ORFV in the presence of a p38 kinase inhibitor markedly diminished ORFV replication, highlighting importance of p38 signaling during ORFV infection. ORFV113 enhancement of p38 activation was prevented in cells in which LPA 1 expression was knocked down and in cells treated with LPA 1 inhibitor. Infection of sheep with OV-IA82Δ113 led to a strikingly attenuated disease phenotype, indicating that ORFV113 is a major virulence determinant in the natural host. Notably, ORFV113 represents the first viral protein that modulates p38 signaling via interaction with LPA 1 receptor.
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