- PDB-6so5: Homo sapiens WRB/CAML heterotetramer in complex with a TRC40 dimer -
+
データを開く
IDまたはキーワード:
読み込み中...
-
基本情報
登録情報
データベース: PDB / ID: 6so5
タイトル
Homo sapiens WRB/CAML heterotetramer in complex with a TRC40 dimer
要素
ATPase ASNA1
Calcium signal-modulating cyclophilin ligand
Tail-anchored protein insertion receptor WRB
キーワード
MEMBRANE PROTEIN / ER / insertase / complex / tail-anchor
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 / receptor recycling / 加水分解酵素; 酸無水物に作用 / protein insertion into ER membrane / post-translational protein targeting to endoplasmic reticulum membrane / Insertion of tail-anchored proteins into the endoplasmic reticulum membrane / B cell homeostasis ...arsenite transmembrane transporter activity / membrane insertase activity / GET complex / tail-anchored membrane protein insertion into ER membrane / receptor recycling / 加水分解酵素; 酸無水物に作用 / protein insertion into ER membrane / post-translational protein targeting to endoplasmic reticulum membrane / Insertion of tail-anchored proteins into the endoplasmic reticulum membrane / B cell homeostasis / negative regulation of proteasomal ubiquitin-dependent protein catabolic process / protein-membrane adaptor activity / vesicle-mediated transport / negative regulation of protein ubiquitination / epidermal growth factor receptor signaling pathway / defense response / protein stabilization / ubiquitin protein ligase binding / endoplasmic reticulum membrane / nucleolus / endoplasmic reticulum / signal transduction / ATP hydrolysis activity / extracellular exosome / nucleoplasm / ATP binding / membrane / nucleus / metal ion binding / cytoplasm 類似検索 - 分子機能
ジャーナル: Mol Cell / 年: 2020 タイトル: Structural Basis of Tail-Anchored Membrane Protein Biogenesis by the GET Insertase Complex. 著者: Melanie A McDowell / Michael Heimes / Francesco Fiorentino / Shahid Mehmood / Ákos Farkas / Javier Coy-Vergara / Di Wu / Jani Reddy Bolla / Volker Schmid / Roger Heinze / Klemens Wild / Dirk ...著者: Melanie A McDowell / Michael Heimes / Francesco Fiorentino / Shahid Mehmood / Ákos Farkas / Javier Coy-Vergara / Di Wu / Jani Reddy Bolla / Volker Schmid / Roger Heinze / Klemens Wild / Dirk Flemming / Stefan Pfeffer / Blanche Schwappach / Carol V Robinson / Irmgard Sinning / 要旨: Membrane protein biogenesis faces the challenge of chaperoning hydrophobic transmembrane helices for faithful membrane insertion. The guided entry of tail-anchored proteins (GET) pathway targets and ...Membrane protein biogenesis faces the challenge of chaperoning hydrophobic transmembrane helices for faithful membrane insertion. The guided entry of tail-anchored proteins (GET) pathway targets and inserts tail-anchored (TA) proteins into the endoplasmic reticulum (ER) membrane with an insertase (yeast Get1/Get2 or mammalian WRB/CAML) that captures the TA from a cytoplasmic chaperone (Get3 or TRC40, respectively). Here, we present cryo-electron microscopy reconstructions, native mass spectrometry, and structure-based mutagenesis of human WRB/CAML/TRC40 and yeast Get1/Get2/Get3 complexes. Get3 binding to the membrane insertase supports heterotetramer formation, and phosphatidylinositol binding at the heterotetramer interface stabilizes the insertase for efficient TA insertion in vivo. We identify a Get2/CAML cytoplasmic helix that forms a "gating" interaction with Get3/TRC40 important for TA insertion. Structural homology with YidC and the ER membrane protein complex (EMC) implicates an evolutionarily conserved insertion mechanism for divergent substrates utilizing a hydrophilic groove. Thus, we provide a detailed structural and mechanistic framework to understand TA membrane insertion.