期刊
VIROLOGICA SINICA
卷 36, 期 4, 页码 608-622出版社
KEAI PUBLISHING LTD
DOI: 10.1007/s12250-020-00322-2
关键词
Foot-and-mouth disease virus (FMDV); Receptors interaction protein 2 (RIP2); PABPC1; 2C; Immune evasion
类别
资金
- National Key R&D Programme of China [2017YFD0501103, 2017YFD0501800]
- Key Development and Research Foundation of Yunnan [2018BB004]
- Chinese Academy of Agricultural Science and Technology Innovation Project [CAAS-XTCX2016011-01, Y2017JC55]
The study found that RIP2 inhibited the replication of foot-and-mouth disease virus (FMDV) and played an important role in the activation of the IFN-β and NF-κB signal pathways during FMDV infection. Specific regions of FMDV proteins were responsible for reducing RIP2 protein expression, with specific regions of 2B and 2C being crucial for this process.
Receptors interaction protein 2 (RIP2) is a specific adaptor molecule in the downstream of NOD2. The role of RIP2 during foot-and-mouth disease virus (FMDV) infection remains unknown. Here, our results showed that RIP2 inhibited FMDV replication and played an important role in the activation of IFN-beta and NF-B signal pathways during FMDV infection. FMDV infection triggered RIP2 transcription, while it reduced the expression of RIP2 protein. Detailed analysis showed that FMDV 2B, 2C, 3C(pro), and L-pro proteins were responsible for inducing the reduction of RIP2 protein. 3C(pro) and L-pro are viral proteinases that can induce the cleavage or reduction of many host proteins and block host protein synthesis. The carboxyl terminal 105-114 and 135-144 regions of 2B were essential for reduction of RIP2. Our results also showed that the N terminal 1-61 region of 2C were essential for the reduction of RIP2. The 2C-induced reduction of RIP2 was dependent on inducing the reduction of poly(A)-binding protein 1 (PABPC1). The interaction between RIP2 and 2C was observed in the context of viral infection, and the residues 1-61 were required for the interaction. These data clarify novel mechanisms of reduction of RIP2 mediated by FMDV.
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