4L6R

Structure of the class B human glucagon G protein coupled receptor


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.3 Å
  • R-Value Free: 0.339 
  • R-Value Work: 0.283 

wwPDB Validation 3D Report Full Report


This is version 1.4 of the entry. See complete history

Literature

Structure of the human glucagon class B G-protein-coupled receptor.

Siu, F.Y.He, M.de Graaf, C.Han, G.W.Yang, D.Zhang, Z.Zhou, C.Xu, Q.Wacker, D.Joseph, J.S.Liu, W.Lau, J.Cherezov, V.Katritch, V.Wang, M.W.Stevens, R.C.

(2013) Nature 499: 444-449

  • DOI: 10.1038/nature12393

  • PubMed Abstract: 
  • Binding of the glucagon peptide to the glucagon receptor (GCGR) triggers the release of glucose from the liver during fasting; thus GCGR plays an important role in glucose homeostasis. Here we report the crystal structure of the seven transmembrane h ...

    Binding of the glucagon peptide to the glucagon receptor (GCGR) triggers the release of glucose from the liver during fasting; thus GCGR plays an important role in glucose homeostasis. Here we report the crystal structure of the seven transmembrane helical domain of human GCGR at 3.4 Å resolution, complemented by extensive site-specific mutagenesis, and a hybrid model of glucagon bound to GCGR to understand the molecular recognition of the receptor for its native ligand. Beyond the shared seven transmembrane fold, the GCGR transmembrane domain deviates from class A G-protein-coupled receptors with a large ligand-binding pocket and the first transmembrane helix having a 'stalk' region that extends three alpha-helical turns above the plane of the membrane. The stalk positions the extracellular domain (~12 kilodaltons) relative to the membrane to form the glucagon-binding site that captures the peptide and facilitates the insertion of glucagon's amino terminus into the seven transmembrane domain.


    Organizational Affiliation

    Department of Integrative Structural and Computational Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Soluble cytochrome b562 and Glucagon receptor chimera
A
425Escherichia coliHomo sapiens
This entity is chimeric
Gene Names: cybC, GCGR
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
G Protein-Coupled Receptors (GPCRs)
Protein: 
Class B GPCR glucagon receptor
Find proteins for P0ABE7 (Escherichia coli)
Go to UniProtKB:  P0ABE7
Find proteins for P47871 (Homo sapiens)
Go to Gene View: GCGR
Go to UniProtKB:  P47871
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PEG
Query on PEG

Download SDF File 
Download CCD File 
A
DI(HYDROXYETHYL)ETHER
C4 H10 O3
MTHSVFCYNBDYFN-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.3 Å
  • R-Value Free: 0.339 
  • R-Value Work: 0.283 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 56.615α = 90.00
b = 66.651β = 90.00
c = 163.331γ = 90.00
Software Package:
Software NamePurpose
Blu-Icedata collection
HKL-2000data reduction
HKL-2000data scaling
BUSTERrefinement
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-07-24
    Type: Initial release
  • Version 1.1: 2013-07-31
    Type: Database references
  • Version 1.2: 2013-08-07
    Type: Database references
  • Version 1.3: 2017-08-16
    Type: Refinement description, Source and taxonomy
  • Version 1.4: 2017-11-15
    Type: Refinement description