8JIU

Cryo-EM structure of the GLP-1R/GCGR dual agonist SAR425899-bound human GCGR-Gs complex


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.76 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


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Literature

Structural analysis of the dual agonism at GLP-1R and GCGR.

Li, Y.Zhou, Q.Dai, A.Zhao, F.Chang, R.Ying, T.Wu, B.Yang, D.Wang, M.W.Cong, Z.

(2023) Proc Natl Acad Sci U S A 120: e2303696120-e2303696120

  • DOI: https://doi.org/10.1073/pnas.2303696120
  • Primary Citation of Related Structures:  
    8JIP, 8JIQ, 8JIR, 8JIS, 8JIT, 8JIU

  • PubMed Abstract: 

    Glucagon-like peptide-1 receptor (GLP-1R) and glucagon receptor (GCGR), two members of class B1 G protein-coupled receptors, play important roles in glucose homeostasis and energy metabolism. They share a high degree of sequence homology but have different functionalities. Unimolecular dual agonists of both receptors developed recently displayed better clinical efficacies than that of monotherapy. To study the underlying molecular mechanisms, we determined high-resolution cryo-electron microscopy structures of GLP-1R or GCGR in complex with heterotrimeric G s protein and three GLP-1R/GCGR dual agonists including peptide 15, MEDI0382 (cotadutide) and SAR425899 with variable activating profiles at GLP-1R versus GCGR. Compared with related structures reported previously and supported by our published pharmacological data, key residues responsible for ligand recognition and dual agonism were identified. Analyses of peptide conformational features revealed a difference in side chain orientations within the first three residues, indicating that distinct engagements in the deep binding pocket are required to achieve receptor selectivity. The middle region recognizes extracellular loop 1 (ECL1), ECL2, and the top of transmembrane helix 1 (TM1) resulting in specific conformational changes of both ligand and receptor, especially the dual agonists reshaped ECL1 conformation of GLP-1R relative to that of GCGR, suggesting an important role of ECL1 interaction in executing dual agonism. Structural investigation of lipid modification showed a better interaction between lipid moiety of MEDI0382 and TM1-TM2 cleft, in line with its increased potency at GCGR than SAR425899. Together, the results provide insightful information for the design and development of improved therapeutics targeting these two receptors simultaneously.


  • Organizational Affiliation

    Department of Medical Microbiology and Parasitology, Shanghai Institute of Infectious Disease and Biosecurity, School of Basic Medical Sciences, Fudan University, Shanghai 200032, China.


Macromolecules
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Guanine nucleotide-binding protein G(s) subunit alpha isoforms short394Homo sapiensMutation(s): 1 
Gene Names: GNASGNAS1GSP
Membrane Entity: Yes 
UniProt & NIH Common Fund Data Resources
Find proteins for P63092 (Homo sapiens)
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Go to UniProtKB:  P63092
PHAROS:  P63092
GTEx:  ENSG00000087460 
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UniProt GroupP63092
Sequence Annotations
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
SAR425899B [auth P]29synthetic constructMutation(s): 0 
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1C [auth B]345Rattus norvegicusMutation(s): 0 
Gene Names: Gnb1
UniProt
Find proteins for P54311 (Rattus norvegicus)
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UniProt GroupP54311
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Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2D [auth C]70Bos taurusMutation(s): 0 
Gene Names: GNG2
Membrane Entity: Yes 
UniProt
Find proteins for P63212 (Bos taurus)
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UniProt GroupP63212
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Entity ID: 5
MoleculeChains Sequence LengthOrganismDetailsImage
Nanobody 35E [auth N]140Escherichia coliMutation(s): 0 
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Entity ID: 6
MoleculeChains Sequence LengthOrganismDetailsImage
Glucagon receptorF [auth R]405Homo sapiensMutation(s): 0 
Gene Names: GCGR
Membrane Entity: Yes 
UniProt & NIH Common Fund Data Resources
Find proteins for P47871 (Homo sapiens)
Explore P47871 
Go to UniProtKB:  P47871
PHAROS:  P47871
GTEx:  ENSG00000215644 
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UniProt GroupP47871
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Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
D6M
Query on D6M

Download Ideal Coordinates CCD File 
G [auth P]N-hexadecanoyl-L-glutamic acid
C21 H39 N O5
KMAOMYOPEIRFLB-SFHVURJKSA-N
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.76 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Natural Science Foundation of China (NSFC)China81872915
National Natural Science Foundation of China (NSFC)China82073904
National Natural Science Foundation of China (NSFC)China82273961
National Natural Science Foundation of China (NSFC)China32200576
National Natural Science Foundation of China (NSFC)China82273985
National Natural Science Foundation of China (NSFC)China82121005
National Natural Science Foundation of China (NSFC)China81973373
National Natural Science Foundation of China (NSFC)China21704064

Revision History  (Full details and data files)

  • Version 1.0: 2023-09-13
    Type: Initial release