ジャーナル: bioRxiv / 年: 2026 タイトル: chromatin dynamics and HIV-1 nuclear trafficking. 著者: Zhen Hou / Yao Shen / Long Chen / Juan Shen / David I Stuart / Peijun Zhang / 要旨: The organization and dynamics of chromatin within intact nuclei remain poorly defined, limiting understanding of how nuclear architecture influences macromolecular transport. HIV-1 provides a ...The organization and dynamics of chromatin within intact nuclei remain poorly defined, limiting understanding of how nuclear architecture influences macromolecular transport. HIV-1 provides a striking example of a large complex that must traverse this dynamic landscape to access integration sites within transcriptionally active regions. Here, we combine a functional nuclear import system with correlative cryo-electron tomography to visualize chromatin architecture and HIV-1 cores during nuclear penetration. Native nucleosomes resolved at 5.6 Å reveal four structural classes, from compact conformations at the nuclear periphery to open, flexible forms in the interior, defining a spatially heterogeneous and dynamic chromatin landscape. Within this environment, HIV-1 cores decorated with nuclear factors exclude nearby nucleosomes and preferentially associate with open chromatin. Disruption of CPSF6-capsid interactions abolishes these associations, confining viral cores to peripheral chromatin. These findings establish an framework linking chromatin structure and dynamics to HIV-1 nuclear trafficking and provide a structural basis for viral navigation within the dynamic nuclear landscape.
超分子 #1: Permeabilised and supplemented CEM T cells
超分子
名称: Permeabilised and supplemented CEM T cells / タイプ: cell / ID: 1 / 親要素: 0 詳細: CEM T cells are permeabilised with 0.018% digitonin and supplemented with rabbit reticulocyte lysate + ATP + GTP + creatine phosphate + creatine kinase