National Natural Science Foundation of China (NSFC)
31900869
中国
National Natural Science Foundation of China (NSFC)
81830090
中国
National Natural Science Foundation of China (NSFC)
81702001
中国
Ministry of Science and Technology (MoST, China)
2017YFA0505600
中国
Ministry of Science and Technology (MoST, China)
2016YFA0502101
中国
引用
ジャーナル: Cell Res / 年: 2020 タイトル: CryoEM structure of the tegumented capsid of Epstein-Barr virus. 著者: Zhihai Li / Xiao Zhang / Lili Dong / Jingjing Pang / Miao Xu / Qian Zhong / Mu-Sheng Zeng / Xuekui Yu / 要旨: Epstein-Barr virus (EBV) is the primary cause of infectious mononucleosis and has been shown to be closely associated with various malignancies. Here, we present a complete atomic model of EBV, ...Epstein-Barr virus (EBV) is the primary cause of infectious mononucleosis and has been shown to be closely associated with various malignancies. Here, we present a complete atomic model of EBV, including the icosahedral capsid, the dodecameric portal and the capsid-associated tegument complex (CATC). Our in situ portal from the tegumented capsid adopts a closed conformation with its channel valve holding the terminal viral DNA and with its crown region firmly engaged by three layers of ring-like dsDNA, which, together with the penton flexibility, effectively alleviates the capsid inner pressure placed on the portal cap. In contrast, the CATCs, through binding to the flexible penton vertices in a stoichiometric manner, accurately increase the inner capsid pressure to facilitate the pressure-driven genome delivery. Together, our results provide important insights into the mechanism by which the EBV capsid, portal, packaged genome and the CATCs coordinately achieve a pressure balance to simultaneously benefit both viral genome retention and ejection.
A: Portal protein B: Portal protein C: Portal protein D: Portal protein E: Portal protein G: Portal protein I: Portal protein K: Portal protein F: Portal protein H: Portal protein J: Portal protein L: Portal protein