The P2 capsid protein of the nonenveloped rice dwarf phytoreovirus induces membrane fusion in insect host cells
The P2 capsid protein of the nonenveloped rice dwarf phytoreovirus induces membrane fusion in insect host cells
复制标题
无包膜水稻矮化植物呼肠孤病毒的 P2 衣壳蛋白诱导昆虫宿主细胞膜融合
DOI:
10.1073/pnas.0708946104
复制
发表时间:
2007-12
期刊:
影响因子:
--
通讯作者:
Wei Chunhong
中科院分区:
文献类型:
--
作者:
Deng Wulan;Ding Biao;Wei Taiyun;Li Yi;Liu Huijun;Pu YingYing;Zhou Feng;Toshihiro Omura;Wei Chunhong
Insect transmission is an essential process of infection for numerous plant and animal viruses. How an insect-transmissible plant virus enters an insect cell to initiate the infection cycle is poorly understood, especially for nonenveloped plant and animal viruses. The capsid protein P2 of rice dwarf virus (RDV), which is nonenveloped, is necessary for insect transmission. Here, we present evidence that P2 shares structural features with membrane-fusogenic proteins encoded by enveloped animal viruses. When RDV P2 was ectopically expressed and displayed on the surface of insect Spodoptera frugiperda cells, it induced membrane fusion characterized by syncytium formation at low pH. Mutational analyses identified the N-terminal and a heptad repeat as being critical for the membrane fusion-inducing activity. These results are corroborated with results from RDV-infected cells of the insect vector leafhopper. We propose that the RDV P2-induced membrane fusion plays a critical role in viral entry into insect cells. Our report that a plant viral protein can induce membrane fusion has broad significance in studying the mechanisms of virus entry into insect cells and insect transmission of nonenveloped plant and animal viruses.
登录
查看更多内容
DOI:
10.1073/pnas.0708217104
发表时间:
2007-11
期刊:
Proceedings of the National Academy of Sciences
影响因子:
--
作者:
Shengqiang Yu;K. Hackmann;Jiangang Gao;Xiaobing He;K. Piontek;M. García-González;L. Menezes;Hangxue Xu;G. Germino;J. Zuo;F. Qian
通讯作者:
Shengqiang Yu;K. Hackmann;Jiangang Gao;Xiaobing He;K. Piontek;M. García-González;L. Menezes;Hangxue Xu;G. Germino;J. Zuo;F. Qian
影响因子:
64.5
作者:
Eckert, DM;Malashkevich, VN;Kim, PS
通讯作者:
Kim, PS
影响因子:
2.7
作者:
B. Zhong;A. Kikuchi;Y. Moriyasu;T. Higashi;K. Hagiwara;T. Omura
通讯作者:
B. Zhong;A. Kikuchi;Y. Moriyasu;T. Higashi;K. Hagiwara;T. Omura
DOI:
--
发表时间:
1993
期刊:
--
影响因子:
--
作者:
S. Nir;M. C. Lima;C. Larsen;J. Wilschut;D. Hoekstra;N. Duzguneş
通讯作者:
S. Nir;M. C. Lima;C. Larsen;J. Wilschut;D. Hoekstra;N. Duzguneş
DOI:
10.1016/s0005-2736(03)00170-6
发表时间:
2003-07
期刊:
Biochimica et biophysica acta
影响因子:
--
作者:
S. Peisajovich;Y. Shai
通讯作者:
S. Peisajovich;Y. Shai