Derlin-1-VIMP complex / signal recognition particle binding / endoplasmic reticulum quality control compartment / Derlin-1 retrotranslocation complex / cellular response to misfolded protein / retrograde protein transport, ER to cytosol / ubiquitin-specific protease binding / MHC class I protein binding / response to unfolded protein / endoplasmic reticulum unfolded protein response ...Derlin-1-VIMP complex / signal recognition particle binding / endoplasmic reticulum quality control compartment / Derlin-1 retrotranslocation complex / cellular response to misfolded protein / retrograde protein transport, ER to cytosol / ubiquitin-specific protease binding / MHC class I protein binding / response to unfolded protein / endoplasmic reticulum unfolded protein response / ERAD pathway / positive regulation of protein ubiquitination / N-glycan trimming in the ER and Calnexin/Calreticulin cycle / establishment of protein localization / Defective CFTR causes cystic fibrosis / protein destabilization / ABC-family proteins mediated transport / late endosome / E3 ubiquitin ligases ubiquitinate target proteins / signaling receptor activity / ATPase binding / protease binding / proteasome-mediated ubiquitin-dependent protein catabolic process / early endosome / ubiquitin protein ligase binding / endoplasmic reticulum membrane / protein-containing complex binding / endoplasmic reticulum / identical protein binding / membrane 類似検索 - 分子機能
Derlin / Der1-like family / Rhomboid-like superfamily 類似検索 - ドメイン・相同性
National Natural Science Foundation of China (NSFC)
U1632132
中国
National Natural Science Foundation of China (NSFC)
31670849
中国
Ministry of Science and Technology (MoST, China)
2017YFC1001303
中国
Ministry of Science and Technology (MoST, China)
2018YFC1004704
中国
引用
ジャーナル: Sci Adv / 年: 2021 タイトル: The cryo-EM structure of an ERAD protein channel formed by tetrameric human Derlin-1. 著者: Bing Rao / Shaobai Li / Deqiang Yao / Qian Wang / Ying Xia / Yi Jia / Yafeng Shen / Yu Cao / 要旨: Endoplasmic reticulum-associated degradation (ERAD) is a process directing misfolded proteins from the ER lumen and membrane to the degradation machinery in the cytosol. A key step in ERAD is the ...Endoplasmic reticulum-associated degradation (ERAD) is a process directing misfolded proteins from the ER lumen and membrane to the degradation machinery in the cytosol. A key step in ERAD is the translocation of ER proteins to the cytosol. Derlins are essential for protein translocation in ERAD, but the mechanism remains unclear. Here, we solved the structure of human Derlin-1 by cryo-electron microscopy. The structure shows that Derlin-1 forms a homotetramer that encircles a large tunnel traversing the ER membrane. The tunnel has a diameter of about 12 to 15 angstroms, large enough to allow an α helix to pass through. The structure also shows a lateral gate within the membrane, providing access of transmembrane proteins to the tunnel, and thus, human Derlin-1 forms a protein channel for translocation of misfolded proteins. Our structure is different from the monomeric yeast Derlin structure previously reported, which forms a semichannel with another protein.