Host Cellular Protein TRAPPC6A Delta Interacts with Influenza A Virus M2 Protein and Regulates Viral Propagation by Modulating M2 Trafficking
文献类型: 外文期刊
作者: Zhu, Pengyang;Liang, Libin;Shao, Xinyuan;Luo, Weiyu;Jiang, Shuitao;Zhao, Qingqing;Sun, Nan;Zhao, Yuhui;Li, Junping;Wang, Jinguang;Zhou, Yuan;Zhang, Jie;Wang, Guangwen;Jiang, Li;Chen, Hualan;Li, Chengjun
作者机构:
关键词: influenza A virus;M2;TRAPPC6A Delta;transport
期刊名称: JOURNAL OF VIROLOGY
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收录情况: SCI
摘要: Influenza A virus (IAV) matrix protein 2 (M2) plays multiple roles in the early and late phases of viral infection. Once synthesized, M2 is translocated to the endoplasmic reticulum (ER), travels to the Golgi apparatus, and is sorted at the trans-Golgi network (TGN) for transport to the apical plasma membrane, where it functions in virus budding. We hypothesized that M2 trafficking along with its secretory pathway must be finely regulated, and host factors could be involved in this process. However, no studies examining the role of host factors in M2 posttranslational transport have been reported. Here, we used a yeast two-hybrid (Y2H) system to screen for host proteins that interact with the M2 protein and identified transport protein particle complex 6A (TRAPPC6A) as a potential binding partner. We found that both TRAPPC6A and its N-terminal internal-deletion isoform, TRAPPC6A delta (TRAPPC6A Delta), interact with M2. Truncation and mutation analyses showed that the highly conserved leucine residue at position 96 of M2 is critical for mediating this interaction. The role of TRAPPC6A Delta in the viral life cycle was investigated by the knockdown of endogenous TRAPPC6A Delta with small interfering RNA (siRNA) and by generating a recombinant virus that was unable to interact with TRAPPC6A/TRAPPC6A Delta The results indicated that TRAPPC6A Delta, through its interaction with M2, slows M2 trafficking to the apical plasma membrane, favors viral replication in vitro, and positively modulates virus virulence in mice.
分类号: Q934.2
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