8K8J | pdb_00008k8j

Cannabinoid Receptor 1 bound to Fenofibrate coupling MiniGsq and Nb35 Complex

• PDB DOI: https://doi.org/10.2210/pdb8K8J/pdb
• EM Map EMD-36951: EMDB EMDataResource

• Classification: MEMBRANE PROTEIN
• Organism(s): Homo sapiens, Escherichia coli
• Expression System: Escherichia coli, Spodoptera frugiperda, Homo sapiens
• Mutation(s): No 
• Membrane Protein: Yes  PDBTMMemProtMD


• Deposited: 2023-07-30 Released: 2024-02-14 
• Deposition Author(s): Tang, W.Q., Wang, T.X., Li, F.H., Wang, J.Y.
• Funding Organization(s): National Natural Science Foundation of China (NSFC)

---

Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 2.88 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Literature

Fenofibrate Recognition and G q Protein Coupling Mechanisms of the Human Cannabinoid Receptor CB1.

Wang, T., Tang, W., Zhao, Z., Zhao, R., Lv, Z., Guo, X., Gu, Q., Liu, B., Lv, H., Chen, J., Zhang, K., Li, F., Wang, J.

(2024) Adv Sci (Weinh) 11: e2306311-e2306311

• PubMed: 38298116 
• DOI: https://doi.org/10.1002/advs.202306311
• Primary Citation Related Structures: 
  8K8J


• PubMed Abstract: 
  

  The G-protein-coupled human cannabinoid receptor 1 (CB1) is a promising therapeutic target for pain management, inflammation, obesity, and substance abuse disorders. The structures of CB1-G _i complexes in synthetic agonist-bound forms have been resolved to date. However, the commercial drug recognition and G _q coupling mechanisms of CB1 remain elusive. Herein, the cryo-electron microscopy (cryo-EM) structure of CB1-G _q complex, in fenofibrate-bound form, at near-atomic resolution, is reported. The structure elucidates the delicate mechanisms of the precise fenofibrate recognition and G _q protein coupling by CB1 and will facilitate future drug discovery and design.

---

Organizational Affiliation: 
• CAS Key Laboratory of Quantitative Engineering Biology, Institute of Synthetic Biology, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, China.
iHuman Institute, ShanghaiTech University, 393 Middle Huaxia Road, Pudong, Shanghai, 201210, China.
Institute of Biophysics, Chinese Academy of Sciences, 15 Datun Road, Chaoyang District, Beijing, 100101, China.
School of Life Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China.
Key Laboratory of Biomacromolecules, Chinese Academy of Sciences, Beijing, 100101, China.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors and generated by (software)

Biological Assembly Evidence: electron microscopy

Macromolecule Content 

• Total Structure Weight: 153.89 kDa 
• Atom Count: 8,155 
• Modeled Residue Count: 1,031 
• Deposited Residue Count: 1,364 
• 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	263	Homo sapiens	Mutation(s): 0  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	340	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]	97	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
Nanobody 35	D [auth N]	139	Homo sapiens	Mutation(s): 0

Entity ID: 5
Molecule	Chains	Sequence Length	Organism	Details	Image
Soluble cytochrome b562,Cannabinoid receptor 1	E [auth R]	525	Escherichia coli, Homo sapiens This entity is chimeric	Mutation(s): 0  Gene Names: cybC, CNR1, CNR Membrane Entity: Yes
UniProt & NIH Common Fund Data Resources
Find proteins for P0ABE7 (Escherichia coli) Explore P0ABE7  Go to UniProtKB:  P0ABE7
Find proteins for P21554 (Homo sapiens) Explore P21554  Go to UniProtKB:  P21554
PHAROS:  P21554 GTEx:  ENSG00000118432
UniProt Groups	P0ABE7P21554

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
J3O (Subject of Investigation/LOI)	F [auth R]	Fenofibrate C20 H21 Cl O4 YMTINGFKWWXKFG-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 2.88 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: 2024-02-14 
Deposition Author(s): Tang, W.Q., Wang, T.X., Li, F.H., Wang, J.Y.

---

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

Revision History  

• Version 1.0: 2024-02-14
  Type: Initial release
  
• Version 1.1: 2024-04-24
  Changes: Database references
• Version 1.2: 2024-11-13
  Changes: Data collection, Structure summary
• Version 1.3: 2024-11-20
  Changes: Data collection, Derived calculations, Structure summary
• Version 1.4: 2025-07-23
  Changes: Data collection