ジャーナル: Nat Commun / 年: 2015 タイトル: Conformational states of the full-length glucagon receptor. 著者: Linlin Yang / Dehua Yang / Chris de Graaf / Arne Moeller / Graham M West / Venkatasubramanian Dharmarajan / Chong Wang / Fai Y Siu / Gaojie Song / Steffen Reedtz-Runge / Bruce D Pascal / ...著者: Linlin Yang / Dehua Yang / Chris de Graaf / Arne Moeller / Graham M West / Venkatasubramanian Dharmarajan / Chong Wang / Fai Y Siu / Gaojie Song / Steffen Reedtz-Runge / Bruce D Pascal / Beili Wu / Clinton S Potter / Hu Zhou / Patrick R Griffin / Bridget Carragher / Huaiyu Yang / Ming-Wei Wang / Raymond C Stevens / Hualiang Jiang / 要旨: Class B G protein-coupled receptors are composed of an extracellular domain (ECD) and a seven-transmembrane (7TM) domain, and their signalling is regulated by peptide hormones. Using a hybrid ...Class B G protein-coupled receptors are composed of an extracellular domain (ECD) and a seven-transmembrane (7TM) domain, and their signalling is regulated by peptide hormones. Using a hybrid structural biology approach together with the ECD and 7TM domain crystal structures of the glucagon receptor (GCGR), we examine the relationship between full-length receptor conformation and peptide ligand binding. Molecular dynamics (MD) and disulfide crosslinking studies suggest that apo-GCGR can adopt both an open and closed conformation associated with extensive contacts between the ECD and 7TM domain. The electron microscopy (EM) map of the full-length GCGR shows how a monoclonal antibody stabilizes the ECD and 7TM domain in an elongated conformation. Hydrogen/deuterium exchange (HDX) studies and MD simulations indicate that an open conformation is also stabilized by peptide ligand binding. The combined studies reveal the open/closed states of GCGR and suggest that glucagon binds to GCGR by a conformational selection mechanism.
全体 : Full-length GCGR in complex with the antigen-binding fragment (Fa...
全体
名称: Full-length GCGR in complex with the antigen-binding fragment (Fab) of the monoclonal antibody mAb2330
要素
試料: Full-length GCGR in complex with the antigen-binding fragment (Fab) of the monoclonal antibody mAb2330
タンパク質・ペプチド: glucagon receptor
タンパク質・ペプチド: antibody mAb2330 Fab
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超分子 #1000: Full-length GCGR in complex with the antigen-binding fragment (Fa...
超分子
名称: Full-length GCGR in complex with the antigen-binding fragment (Fab) of the monoclonal antibody mAb2330 タイプ: sample / ID: 1000 / 集合状態: heterodimer / Number unique components: 2