9IXJ | pdb_00009ixj

histamine-bound H2R in complex with Gs

• PDB DOI: https://doi.org/10.2210/pdb9IXJ/pdb
• EM Map EMD-60971: EMDB EMDataResource

• Classification: MEMBRANE PROTEIN/IMMUNE SYSTEM
• Organism(s): Homo sapiens, Lama glama
• Expression System: Spodoptera frugiperda, Escherichia coli
• Mutation(s): Yes 
• Membrane Protein: Yes  MemProtMD


• Deposited: 2024-07-28 Released: 2025-07-30 
• Deposition Author(s): He, Y., Chen, K.
• Funding Organization(s): National Natural Science Foundation of China (NSFC)

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 2.92 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Literature

histamine-bound H2R in complex with Gs

He, Y., Chen, K.

To be published.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 5-mer - A1B1C1D1E1 

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: electron microscopy

Macromolecule Content 

• Total Structure Weight: 150.01 kDa 
• Atom Count: 8,055 
• Modeled Residue Count: 1,029 
• Deposited Residue Count: 1,336 
• Unique protein chains: 5

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Guanine nucleotide-binding protein G(s) subunit alpha isoforms short	A	398	Homo sapiens	Mutation(s): 1  Gene Names: GNAS, GNAS1, GSP EC: 3.6.5 Membrane Entity: Yes
UniProt & NIH Common Fund Data Resources
Find proteins for P63092 (Homo sapiens) Explore P63092  Go to UniProtKB:  P63092
PHAROS:  P63092 GTEx:  ENSG00000087460

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1	B	347	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: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2	C [auth G]	71	Homo sapiens	Mutation(s): 0  Gene Names: GNG2 Membrane Entity: Yes
UniProt & NIH Common Fund Data Resources
Find proteins for P59768 (Homo sapiens) Explore P59768  Go to UniProtKB:  P59768
PHAROS:  P59768 GTEx:  ENSG00000186469

Entity ID: 4
Molecule	Chains	Sequence Length	Organism	Details	Image
Nb35	D [auth N]	161	Lama glama	Mutation(s): 0

Entity ID: 5
Molecule	Chains	Sequence Length	Organism	Details	Image
Histamine H2 receptor	E [auth R]	359	Homo sapiens	Mutation(s): 0  Gene Names: HRH2 Membrane Entity: Yes
UniProt & NIH Common Fund Data Resources
Find proteins for P25021 (Homo sapiens) Explore P25021  Go to UniProtKB:  P25021
PHAROS:  P25021 GTEx:  ENSG00000113749

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
CLR	G [auth R]	CHOLESTEROL C27 H46 O HVYWMOMLDIMFJA-DPAQBDIFSA-N
HSM	F [auth R]	HISTAMINE C5 H9 N3 NTYJJOPFIAHURM-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 2.92 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

EM Software:

Task	Software Package	Version
MODEL REFINEMENT	PHENIX

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2025-07-30 
Deposition Author(s): He, Y., Chen, K.

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Funding Organization	Location	Grant Number
National Natural Science Foundation of China (NSFC)	China	32070048

Revision History  

• Version 1.0: 2025-07-30
  Type: Initial release