Japan Agency for Medical Research and Development (AMED)
19fk0108113
日本
Japan Agency for Medical Research and Development (AMED)
20fk0108270h0001
日本
Japan Science and Technology
JPMJCR20HA
日本
引用
ジャーナル: Nat Commun / 年: 2022 タイトル: Structural insight into Marburg virus nucleoprotein-RNA complex formation. 著者: Yoko Fujita-Fujiharu / Yukihiko Sugita / Yuki Takamatsu / Kazuya Houri / Manabu Igarashi / Yukiko Muramoto / Masahiro Nakano / Yugo Tsunoda / Ichiro Taniguchi / Stephan Becker / Takeshi Noda / 要旨: The nucleoprotein (NP) of Marburg virus (MARV), a close relative of Ebola virus (EBOV), encapsidates the single-stranded, negative-sense viral genomic RNA (vRNA) to form the helical NP-RNA complex. ...The nucleoprotein (NP) of Marburg virus (MARV), a close relative of Ebola virus (EBOV), encapsidates the single-stranded, negative-sense viral genomic RNA (vRNA) to form the helical NP-RNA complex. The NP-RNA complex constitutes the core structure for the assembly of the nucleocapsid that is responsible for viral RNA synthesis. Although appropriate interactions among NPs and RNA are required for the formation of nucleocapsid, the structural basis of the helical assembly remains largely elusive. Here, we show the structure of the MARV NP-RNA complex determined using cryo-electron microscopy at a resolution of 3.1 Å. The structures of the asymmetric unit, a complex of an NP and six RNA nucleotides, was very similar to that of EBOV, suggesting that both viruses share common mechanisms for the nucleocapsid formation. Structure-based mutational analysis of both MARV and EBOV NPs identified key residues for helical assembly and subsequent viral RNA synthesis. Importantly, most of the residues identified were conserved in both viruses. These findings provide a structural basis for understanding the nucleocapsid formation and contribute to the development of novel antivirals against MARV and EBOV.
凍結剤: ETHANE / チャンバー内湿度: 100 % / チャンバー内温度: 277 K / 装置: FEI VITROBOT MARK IV 詳細: Apply 1.25 micro littere of sample from each side of the grid and blot for 7 seconds before plunging.