National Health and Medical Research Council (NHMRC, Australia)
APP1164216
オーストラリア
引用
ジャーナル: Sci Adv / 年: 2021 タイトル: The structure of an infectious immature flavivirus redefines viral architecture and maturation. 著者: Natalee D Newton / Joshua M Hardy / Naphak Modhiran / Leon E Hugo / Alberto A Amarilla / Summa Bibby / Hariprasad Venugopal / Jessica J Harrison / Renee J Traves / Roy A Hall / Jody Hobson- ...著者: Natalee D Newton / Joshua M Hardy / Naphak Modhiran / Leon E Hugo / Alberto A Amarilla / Summa Bibby / Hariprasad Venugopal / Jessica J Harrison / Renee J Traves / Roy A Hall / Jody Hobson-Peters / Fasséli Coulibaly / Daniel Watterson / 要旨: Flaviviruses are the cause of severe human diseases transmitted by mosquitoes and ticks. These viruses use a potent fusion machinery to enter target cells that needs to be restrained during viral ...Flaviviruses are the cause of severe human diseases transmitted by mosquitoes and ticks. These viruses use a potent fusion machinery to enter target cells that needs to be restrained during viral assembly and egress. A molecular chaperone, premembrane (prM) maintains the virus particles in an immature, fusion-incompetent state until they exit the cell. Taking advantage of an insect virus that produces particles that are both immature and infectious, we determined the structure of the first immature flavivirus with a complete spike by cryo-electron microscopy. Unexpectedly, the prM chaperone forms a supporting pillar that maintains the immature spike in an asymmetric and upright state, primed for large rearrangements upon acidification. The collapse of the spike along a path defined by the prM chaperone is required, and its inhibition by a multivalent immunoglobulin M blocks infection. The revised architecture and collapse model are likely to be conserved across flaviviruses.
全体 : Binjari virus complexed with pr-specific Fab 2A7
全体
名称: Binjari virus complexed with pr-specific Fab 2A7
要素
複合体: Binjari virus complexed with pr-specific Fab 2A7
複合体: 2A7 Fab
ウイルス: Binjari virus (ウイルス)
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超分子 #1: Binjari virus complexed with pr-specific Fab 2A7
超分子
名称: Binjari virus complexed with pr-specific Fab 2A7 / タイプ: complex / ID: 1 / 親要素: 0 詳細: M and E from Binjari virus form a complex that assembles into an asymmetric trimeric spike of prM-E heterodimers. The organization of the immature BinJV particles is T=1 with an asymmetric ...詳細: M and E from Binjari virus form a complex that assembles into an asymmetric trimeric spike of prM-E heterodimers. The organization of the immature BinJV particles is T=1 with an asymmetric spike as the basic building block. The 2A7 Fab recognises an epitope on the pr region of BinJV prM and binds the virus with full ocupancy (1:1)
分子量
理論値: 22 MDa
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超分子 #3: 2A7 Fab
超分子
名称: 2A7 Fab / タイプ: complex / ID: 3 / 親要素: 1 詳細: 2A7 Fab fragment generated by cleavage of recombinantly produced IgG 2A7 antibody
由来(天然)
生物種: Mus musculus (ハツカネズミ)
組換発現
生物種: Cricetulus griseus (モンゴルキヌゲネズミ) 組換細胞: CHO
分子量
理論値: 50 KDa
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超分子 #2: Binjari virus
超分子
名称: Binjari virus / タイプ: virus / ID: 2 / 親要素: 1 詳細: M and E from Binjari virus form a complex that assembles into an asymmetric trimeric spike of prM-E heterodimers. The organization of the immature BinJV particles is T=1 with an asymmetric ...詳細: M and E from Binjari virus form a complex that assembles into an asymmetric trimeric spike of prM-E heterodimers. The organization of the immature BinJV particles is T=1 with an asymmetric spike as the basic building block. NCBI-ID: 2305258 / 生物種: Binjari virus / Sci species strain: BFTA20 / ウイルスタイプ: VIRION / ウイルス・単離状態: SPECIES / ウイルス・エンベロープ: Yes / ウイルス・中空状態: No