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Published on: December 29, 2015
TRIM52 inhibits Japanese Encephalitis Virus replication by degrading the viral NS2A
Wenchun Fan1,2, Mengge Wu1,2, Suhong Qian1,2
1State Key Laboratory of Agriculture Microbiology, Huazhong Agricultural University, Wuhan 430070, P. R. China.
Abstract:
The members of tripartite-motif containing (TRIM) protein participate in various cellular processes and play an important role in host antiviral function. TRIM proteins exert their antiviral activity either directly by degrading viral proteins through their E3 ligase activity, or indirectly by promoting host innate immunity. This study demonstrated for the first time that TRIM52 is a novel antiviral TRIM protein against Japanese encephalitis virus (JEV) infection. Overexpression of TRIM52 restricted JEV replication in BHK-21 and 293T cells. In addition, JEV nonstructural protein 2A (NS2A) is a protein that interacts with TRIM52. Their interaction degraded NS2A in a proteasome-dependent manner via the E3 ligase activity of TRIM52. Thus, TRIM52 is a novel antiviral TRIM protein, and it exerted antiviral activity against JEV infection by targeting and degrading viral NS2A.
Insights
Tripartite-motif containing 52 (TRIM52) protein acts as a novel antiviral against Japanese encephalitis virus (JEV). TRIM52 targets and degrades the JEV NS2A protein, restricting viral replication.
Area of Science:
- Virology
- Immunology
- Molecular Biology
Background:
- Tripartite-motif containing (TRIM) proteins are crucial for cellular processes and host antiviral defense.
- TRIM proteins inhibit viruses by degrading viral proteins or enhancing innate immunity.
Purpose of the Study:
- To identify novel antiviral TRIM proteins against Japanese encephalitis virus (JEV).
- To elucidate the mechanism of TRIM52's antiviral activity against JEV.
Main Methods:
- Overexpression of TRIM52 in BHK-21 and 293T cells.
- Analysis of JEV replication and protein interactions.
- Investigation of TRIM52's E3 ligase activity and proteasomal degradation pathways.
Main Results:
- TRIM52 was identified as a novel antiviral factor against JEV.
- TRIM52 overexpression significantly restricted JEV replication.
- TRIM52 interacts with JEV nonstructural protein 2A (NS2A).
- TRIM52's E3 ligase activity mediates proteasome-dependent degradation of NS2A.
Conclusions:
- TRIM52 is a novel antiviral TRIM protein effective against JEV.
- TRIM52 exerts antiviral effects by targeting and degrading the viral NS2A protein through its E3 ligase activity.
