6WHC

CryoEM Structure of the glucagon receptor with a dual-agonist peptide


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.40 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation 3D Report Full Report



Literature

Cryo-electron microscopy structure of the glucagon receptor with a dual-agonist peptide.

Chang, R.Zhang, X.Qiao, A.Dai, A.Belousoff, M.J.Tan, Q.Shao, L.Zhong, L.Lin, G.Liang, Y.L.Ma, L.Han, S.Yang, D.Danev, R.Wang, M.W.Wootten, D.Wu, B.Sexton, P.M.

(2020) J Biol Chem 

  • DOI: 10.1074/jbc.RA120.013793
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • Unimolecular dual agonists of the glucagon (GCG) receptor (GCGR) and glucagon-like peptide-1 receptor (GLP-1R) are a new class of drugs that are potentially superior to GLP-1R-specific agonists for the management of metabolic disease. The dual-agonis ...

    Unimolecular dual agonists of the glucagon (GCG) receptor (GCGR) and glucagon-like peptide-1 receptor (GLP-1R) are a new class of drugs that are potentially superior to GLP-1R-specific agonists for the management of metabolic disease. The dual-agonist, peptide 15 (P15), is a glutamic acid 16 analogue of GCG with GLP-1 peptide substitutions between amino acids 17 and 24 that has potency equivalent to those of the cognate peptide agonists at the GCGR and GLP-1R. Here, we have used cryo-EM to solve the structure of an active P15:GCGR:Gs complex and compared this structure to our recently published structure of the GCGR:Gs complex bound to GCG. This comparison revealed that P15 has a reduced interaction with the first extracellular loop (ECL1) and the top of transmembrane segment 1 (TM1) such that there is increased mobility of the GCGR extracellular domain and at the C-terminus of the peptide compared with the GCG-bound receptor. We also observed a distinct conformation of ECL3 and could infer increased mobility of the far N-terminal His-1 residue in the P15-bound structure. These regions of conformational variance in the two peptide-bound GCGR structures were also regions that were distinct between GCGR structures and previously published peptide-bound structures of the GLP-1R, suggesting that greater conformational dynamics may contribute to the increased efficacy of P15 in activation of the GLP-1R compared with GCG. The variable domains in this receptor have previously been implicated in biased agonism at the GLP-1R and could result in altered signaling of P15 at the GCGR compared with GCG.


    Organizational Affiliation

    Monash Institute of Pharmaceutical Sciences, Monash University, Australia.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
C
71Homo sapiensMutation(s): 0 
Gene Names: GNG2
Find proteins for P59768 (Homo sapiens)
Go to UniProtKB:  P59768
NIH Common Fund Data Resources
PHAROS  P59768

Find similar proteins by: Sequence  |  Structure

Entity ID: 5
MoleculeChainsSequence LengthOrganismDetails
Nanobody35
N
138Lama glamaMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Guanine nucleotide-binding protein G(s) subunit alpha isoforms short
A
394Homo sapiensMutation(s): 0 
Gene Names: GNASGNAS1GSP
Find proteins for P63092 (Homo sapiens)
Go to UniProtKB:  P63092
NIH Common Fund Data Resources
PHAROS  P63092

Find similar proteins by: Sequence  |  Structure

Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
B
340Homo sapiensMutation(s): 0 
Gene Names: GNB1
Find proteins for P62873 (Homo sapiens)
Go to UniProtKB:  P62873
NIH Common Fund Data Resources
PHAROS  P62873

Find similar proteins by: Sequence  |  Structure

Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
Dual-agonist peptide
E
29synthetic constructMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.

Find similar proteins by: Sequence  |  Structure

Entity ID: 6
MoleculeChainsSequence LengthOrganismDetails
Glucagon receptor
R
477Homo sapiensMutation(s): 0 
Gene Names: GCGR
Find proteins for P47871 (Homo sapiens)
Go to UniProtKB:  P47871
NIH Common Fund Data Resources
PHAROS  P47871
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.40 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Health and Medical Research Council (NHMRC, Australia)Australia1120919
National Health and Medical Research Council (NHMRC, Australia)Australia1159006
National Health and Medical Research Council (NHMRC, Australia)Australia1150083
Japan Science and TechnologyJapan#18069571
Takeda Science FoundationJapan2019 Medical Research Grant
National Science Foundation (NSF, China)China2018ZX09735-001
National Science Foundation (NSF, China)China2018ZX09711002-002-005
National Science Foundation (NSF, China)China2018ZX09711002-001
National Key R&D Program of ChinaChina2018YFA0507000
Novo Nordisk FoundationChinaNNCAS-2017-1-CC

Revision History 

  • Version 1.0: 2020-05-27
    Type: Initial release