9N2I | pdb_00009n2i

cryo-EM structure of GCGR-Gs complex with SRB103Q

• PDB DOI: https://doi.org/10.2210/pdb9N2I/pdb
• EM Map EMD-48838: EMDB EMDataResource

• Classification: MEMBRANE PROTEIN
• Organism(s): Homo sapiens, Lama glama, synthetic construct
• Expression System: Trichoplusia ni, Escherichia coli
• Mutation(s): Yes 


• Deposited: 2025-01-28 Released: 2026-04-22 
• Deposition Author(s): Zhang, X., Mohebali, N., Belousoff, M.J., Wootten, D., Sexton, P.M.
• Funding Organization(s): Australian Research Council (ARC)

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 3.00 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Literature

cryo-EM structure of GCGR-Gs complex with SRB103Q

Zhang, X., Mohebali, N., Belousoff, M.J., Wootten, D., Sexton, P.M.

To be published.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 6-mer - A1B1C1D1E1F1 

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: electron microscopy

Macromolecule Content 

• Total Structure Weight: 162.9 kDa 
• Atom Count: 9,353 
• Modeled Residue Count: 1,177 
• Deposited Residue Count: 1,442 
• Unique protein chains: 6

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Glucagon receptor	A [auth R]	475	Homo sapiens	Mutation(s): 0  Gene Names: GCGR
UniProt & NIH Common Fund Data Resources
Find proteins for P47871 (Homo sapiens) Explore P47871  Go to UniProtKB:  P47871
PHAROS:  P47871 GTEx:  ENSG00000215644

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Guanine nucleotide-binding protein G(s) subunit alpha isoforms short	B [auth A]	394	Homo sapiens	Mutation(s): 8  Gene Names: GNAS, GNAS1, GSP EC: 3.6.5
UniProt & NIH Common Fund Data Resources
Find proteins for P63092 (Homo sapiens) Explore P63092  Go to UniProtKB:  P63092
PHAROS:  P63092 GTEx:  ENSG00000087460

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1	C [auth B]	350	Homo sapiens	Mutation(s): 0  Gene Names: GNB1
UniProt & NIH Common Fund Data Resources
Find proteins for P62873 (Homo sapiens) Explore P62873  Go to UniProtKB:  P62873
PHAROS:  P62873 GTEx:  ENSG00000078369

Entity ID: 4
Molecule	Chains	Sequence Length	Organism	Details	Image
Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2	D [auth G]	58	Homo sapiens	Mutation(s): 0  Gene Names: GNG2
UniProt & NIH Common Fund Data Resources
Find proteins for P59768 (Homo sapiens) Explore P59768  Go to UniProtKB:  P59768
PHAROS:  P59768 GTEx:  ENSG00000186469

Entity ID: 5
Molecule	Chains	Sequence Length	Organism	Details	Image
Nb35	E [auth N]	128	Lama glama	Mutation(s): 0

Entity ID: 6
Molecule	Chains	Sequence Length	Organism	Details	Image
SRB103Q	F [auth P]	37	synthetic construct	Mutation(s): 0

Small Molecules

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
AIB	F [auth P]	L-PEPTIDE LINKING	C4 H9 N O2		ALA

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 3.00 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

EM Software:

Task	Software Package	Version
MODEL REFINEMENT	PHENIX	1.21_5207

Structure Validation

Entry History 

& Funding Information

Deposition Data

• Released Date: 2026-04-22 
Deposition Author(s): Zhang, X., Mohebali, N., Belousoff, M.J., Wootten, D., Sexton, P.M.

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Funding Organization	Location	Grant Number
Australian Research Council (ARC)	Australia	DE230101681

Revision History  

• Version 1.0: 2026-04-22
  Type: Initial release