Biotechnology and Biological Sciences Research Council (BBSRC)
BB/T002670/1
英国
European Research Council (ERC)
852915 CRYTOCOP
英国
引用
ジャーナル: Nat Commun / 年: 2021 タイトル: Structure of the complete, membrane-assembled COPII coat reveals a complex interaction network. 著者: Joshua Hutchings / Viktoriya G Stancheva / Nick R Brown / Alan C M Cheung / Elizabeth A Miller / Giulia Zanetti / 要旨: COPII mediates Endoplasmic Reticulum to Golgi trafficking of thousands of cargoes. Five essential proteins assemble into a two-layer architecture, with the inner layer thought to regulate coat ...COPII mediates Endoplasmic Reticulum to Golgi trafficking of thousands of cargoes. Five essential proteins assemble into a two-layer architecture, with the inner layer thought to regulate coat assembly and cargo recruitment, and the outer coat forming cages assumed to scaffold membrane curvature. Here we visualise the complete, membrane-assembled COPII coat by cryo-electron tomography and subtomogram averaging, revealing the full network of interactions within and between coat layers. We demonstrate the physiological importance of these interactions using genetic and biochemical approaches. Mutagenesis reveals that the inner coat alone can provide membrane remodelling function, with organisational input from the outer coat. These functional roles for the inner and outer coats significantly move away from the current paradigm, which posits membrane curvature derives primarily from the outer coat. We suggest these interactions collectively contribute to coat organisation and membrane curvature, providing a structural framework to understand regulatory mechanisms of COPII trafficking and secretion.
解像度のタイプ: BY AUTHOR / 解像度: 40.0 Å / ソフトウェア - 名称: Dynamo 詳細: SUBMISSION BASED ON EXPERIMENTAL DATA FROM EMDB EMD -2430. (DEPOSITION ID: 11862). 使用したサブトモグラム数: 182