- PDB-8cqz: Homo sapiens Get3 in complex with the Get1 cytoplasmic domain -
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基本情報
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データベース: PDB / ID: 8cqz
タイトル
Homo sapiens Get3 in complex with the Get1 cytoplasmic domain
要素
ATPase ASNA1
Guided entry of tail-anchored proteins factor 1
キーワード
PROTEIN TRANSPORT / membrane protein insertion / GET pathway / tail anchored membrane protein
機能・相同性
機能・相同性情報
arsenite transmembrane transporter activity / membrane insertase activity / GET complex / tail-anchored membrane protein insertion into ER membrane / protein insertion into ER membrane / Insertion of tail-anchored proteins into the endoplasmic reticulum membrane / membrane-membrane adaptor activity / 加水分解酵素; 酸無水物に作用; 酸無水物に作用・細胞または細胞小器官の運動に関与 / protein stabilization / endoplasmic reticulum membrane ...arsenite transmembrane transporter activity / membrane insertase activity / GET complex / tail-anchored membrane protein insertion into ER membrane / protein insertion into ER membrane / Insertion of tail-anchored proteins into the endoplasmic reticulum membrane / membrane-membrane adaptor activity / 加水分解酵素; 酸無水物に作用; 酸無水物に作用・細胞または細胞小器官の運動に関与 / protein stabilization / endoplasmic reticulum membrane / nucleolus / ATP hydrolysis activity / extracellular exosome / nucleoplasm / ATP binding / nucleus / metal ion binding / cytoplasm 類似検索 - 分子機能
ジャーナル: Nat Commun / 年: 2023 タイトル: The GET insertase exhibits conformational plasticity and induces membrane thinning. 著者: Melanie A McDowell / Michael Heimes / Giray Enkavi / Ákos Farkas / Daniel Saar / Klemens Wild / Blanche Schwappach / Ilpo Vattulainen / Irmgard Sinning / 要旨: The eukaryotic guided entry of tail-anchored proteins (GET) pathway mediates the biogenesis of tail-anchored (TA) membrane proteins at the endoplasmic reticulum. In the cytosol, the Get3 chaperone ...The eukaryotic guided entry of tail-anchored proteins (GET) pathway mediates the biogenesis of tail-anchored (TA) membrane proteins at the endoplasmic reticulum. In the cytosol, the Get3 chaperone captures the TA protein substrate and delivers it to the Get1/Get2 membrane protein complex (GET insertase), which then inserts the substrate via a membrane-embedded hydrophilic groove. Here, we present structures, atomistic simulations and functional data of human and Chaetomium thermophilum Get1/Get2/Get3. The core fold of the GET insertase is conserved throughout eukaryotes, whilst thinning of the lipid bilayer occurs in the vicinity of the hydrophilic groove to presumably lower the energetic barrier of membrane insertion. We show that the gating interaction between Get2 helix α3' and Get3 drives conformational changes in both Get3 and the Get1/Get2 membrane heterotetramer. Thus, we provide a framework to understand the conformational plasticity of the GET insertase and how it remodels its membrane environment to promote substrate insertion.