ジャーナル: Nat Microbiol / 年: 2024 タイトル: Molecular plasticity of herpesvirus nuclear egress analysed in situ. 著者: Vojtěch Pražák / Yuliia Mironova / Daven Vasishtan / Christoph Hagen / Ulrike Laugks / Yannick Jensen / Saskia Sanders / John M Heumann / Jens B Bosse / Barbara G Klupp / Thomas C ...著者: Vojtěch Pražák / Yuliia Mironova / Daven Vasishtan / Christoph Hagen / Ulrike Laugks / Yannick Jensen / Saskia Sanders / John M Heumann / Jens B Bosse / Barbara G Klupp / Thomas C Mettenleiter / Michael Grange / Kay Grünewald / 要旨: The viral nuclear egress complex (NEC) allows herpesvirus capsids to escape from the nucleus without compromising the nuclear envelope integrity. The NEC lattice assembles on the inner nuclear ...The viral nuclear egress complex (NEC) allows herpesvirus capsids to escape from the nucleus without compromising the nuclear envelope integrity. The NEC lattice assembles on the inner nuclear membrane and mediates the budding of nascent nucleocapsids into the perinuclear space and their subsequent release into the cytosol. Its essential role makes it a potent antiviral target, necessitating structural information in the context of a cellular infection. Here we determined structures of NEC-capsid interfaces in situ using electron cryo-tomography, showing a substantial structural heterogeneity. In addition, while the capsid is associated with budding initiation, it is not required for curvature formation. By determining the NEC structure in several conformations, we show that curvature arises from an asymmetric assembly of disordered and hexagonally ordered lattice domains independent of pUL25 or other viral capsid vertex components. Our results advance our understanding of the mechanism of nuclear egress in the context of a living cell.
想定した対称性 - 点群: C2 (2回回転対称) / 解像度のタイプ: BY AUTHOR / 解像度: 21.0 Å / 解像度の算出法: FSC 0.143 CUT-OFF / ソフトウェア - 名称: PEET 詳細: FSC was calculated by taking the final particles, splitting them into two groups and randomising their orientations by a maximum of 15 degrees. These two groups were then separately refined. 使用したサブトモグラム数: 3