National Natural Science Foundation of China (NSFC)
31870743
中国
引用
ジャーナル: Commun Biol / 年: 2021 タイトル: Structure and assembly of double-headed Sendai virus nucleocapsids. 著者: Na Zhang / Hong Shan / Mingdong Liu / Tianhao Li / Rui Luo / Liuyan Yang / Lei Qi / Xiaofeng Chu / Xin Su / Rui Wang / Yunhui Liu / Wenzhi Sun / Qing-Tao Shen / 要旨: Paramyxoviruses, including the mumps virus, measles virus, Nipah virus and Sendai virus (SeV), have non-segmented single-stranded negative-sense RNA genomes which are encapsidated by nucleoproteins ...Paramyxoviruses, including the mumps virus, measles virus, Nipah virus and Sendai virus (SeV), have non-segmented single-stranded negative-sense RNA genomes which are encapsidated by nucleoproteins into helical nucleocapsids. Here, we reported a double-headed SeV nucleocapsid assembled in a tail-to-tail manner, and resolved its helical stems and clam-shaped joint at the respective resolutions of 2.9 and 3.9 Å, via cryo-electron microscopy. Our structures offer important insights into the mechanism of the helical polymerization, in particular via an unnoticed exchange of a N-terminal hole formed by three loops of nucleoproteins, and unveil the clam-shaped joint in a hyper-closed state for nucleocapsid dimerization. Direct visualization of the loop from the disordered C-terminal tail provides structural evidence that C-terminal tail is correlated to the curvature of nucleocapsid and links nucleocapsid condensation and genome replication and transcription with different assembly forms.
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Data content type: FSC / Data content type: FSC / Provider: repository / タイプ: Initial release
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2021年3月24日
Data content type: Image / Data content type: Image / Provider: repository / タイプ: Initial release
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2021年3月24日
Data content type: Primary map / Data content type: Primary map / Provider: repository / タイプ: Initial release
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