5XF1 : Structure of the Full-length glucagon class B G protein-coupled receptor

  • Steffen Reedtz-Runge (Contributor)
  • Raymond C. Stevens (Contributor)
  • Thomas Grant (Contributor)
  • Ming Wei Wang (Contributor)
  • Jesper Lau (Contributor)
  • Qiang Zhao (Contributor)
  • Limin Ma (Contributor)
  • Haonan Zhang (Contributor)
  • Zhi Geng (Contributor)
  • Xiaoqing Cai (Contributor)
  • Beili Wu (Contributor)
  • G. Nelson (Contributor)
  • Michael A. Hanson (Contributor)
  • Chris De Graaf (Contributor)
  • Dehua Yang (Contributor)
  • Hualiang Jiang (Contributor)
  • Gye Won Han (Contributor)
  • Linlin Yang (Contributor)
  • Raymond Sierra (Contributor)
  • Raymond C. Stevens (Contributor)
  • Wei Liu (Contributor)
  • Patrick R. Griffin (Contributor)
  • Uwe Weierstall (Contributor)
  • Yuhui Dong (Contributor)
  • Yanhong Wu (Contributor)
  • Hui Zhang (Contributor)
  • Huaiyu Yang (Contributor)
  • Vadim Cherezov (Contributor)
  • Antao Dai (Contributor)
  • Venkatasubramanian Dharmarajan (Contributor)
  • Xiaoai Wu (Contributor)
  • Anna Qiao (Contributor)
  • Guangyao Lin (Contributor)
  • Gaojie Song (Contributor)



Experimental Technique/Method:X-RAY DIFFRACTION
Release Date:2017-05-24
Deposition Date:2017-04-06
Revision Date:2017-06-07#2017-06-14
Molecular Weight:232295.92
Macromolecule Type:Protein
Residue Count:2038
Atom Site Count:15040

The human glucagon receptor, GCGR, belongs to the class B G-protein-coupled receptor family and plays a key role in glucose homeostasis and the pathophysiology of type 2 diabetes. Here we report the 3.0 Å crystal structure of full-length GCGR containing both the extracellular domain and transmembrane domain in an inactive conformation. The two domains are connected by a 12-residue segment termed the stalk, which adopts a β-strand conformation, instead of forming an α-helix as observed in the previously solved structure of the GCGR transmembrane domain. The first extracellular loop exhibits a β-hairpin conformation and interacts with the stalk to form a compact β-sheet structure. Hydrogen-deuterium exchange, disulfide crosslinking and molecular dynamics studies suggest that the stalk and the first extracellular loop have critical roles in modulating peptide ligand binding and receptor activation. These insights into the full-length GCGR structure deepen our understanding of the signalling mechanisms of class B G-protein-coupled receptors.
Date made availableMay 24 2017

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