21DU | pdb_000021du

Cryo-EM structure of the apomorphine bound ADGRG6-Gs complex

• PDB DOI: https://doi.org/10.2210/pdb21DU/pdb
• EM Map EMD-67602: EMDB EMDataResource

• Classification: MEMBRANE PROTEIN/IMMUNE SYSTEM
• Organism(s): Homo sapiens, Lama glama
• Expression System: Spodoptera frugiperda
• Mutation(s): No 


• Deposited: 2025-12-09 Released: 2026-02-11 
• Deposition Author(s): Han, S., Wu, B., Zhao, Q.
• Funding Organization(s): National Science Foundation (NSF, China)

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 2.90 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Literature

Extra-helical allosteric binding site of apomorphine in ADGRG6.

Qiu, N., Xu, W., Xu, T., Xie, W., Jiang, Y., Zhong, Z., Ma, L., Zhao, Q., Wu, B., Han, S.

(2026) Cell Discov 12: 9-9

• PubMed: 41633965 
• DOI: https://doi.org/10.1038/s41421-025-00866-1
• Primary Citation of Related Structures:  
  21DU

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Organizational Affiliation: 
• State Key Laboratory of Drug Research, State Key Laboratory of Chemical Biology, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China.
School of Life Science and Technology, ShanghaiTech University, Shanghai, China.
Lingang Laboratory, Shanghai, China.
University of Chinese Academy of Sciences, Beijing, China.
School of Chinese Materia Medica, Nanjing University of Chinese Medicine, Nanjing, Jiangsu, China.
State Key Laboratory of Drug Research, State Key Laboratory of Chemical Biology, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China. [e-mail].
University of Chinese Academy of Sciences, Beijing, China. [e-mail].
School of Chinese Materia Medica, Nanjing University of Chinese Medicine, Nanjing, Jiangsu, China. [e-mail].
Zhongshan Institute for Drug Discovery, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Zhongshan, Guangdong, China. [e-mail].
State Key Laboratory of Drug Research, State Key Laboratory of Chemical Biology, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China. [e-mail].
School of Life Science and Technology, ShanghaiTech University, Shanghai, China. [e-mail].
University of Chinese Academy of Sciences, Beijing, China. [e-mail].
School of Pharmaceutical Science and Technology, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou, Zhejiang, China. [e-mail].
Shanghai Academy of Natural Sciences (SANS), Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China. [e-mail].
State Key Laboratory of Drug Research, State Key Laboratory of Chemical Biology, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China. [e-mail].
University of Chinese Academy of Sciences, Beijing, China. [e-mail].

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: 160.79 kDa 
• Atom Count: 8,058 
• Modeled Residue Count: 1,039 
• Deposited Residue Count: 1,435 
• Unique protein chains: 5

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Guanine nucleotide-binding protein G(s) subunit alpha	A	246	Homo sapiens	Mutation(s): 0

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1	B	351	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	71	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: 4
Molecule	Chains	Sequence Length	Organism	Details	Image
nb35	D [auth N]	162	Lama glama	Mutation(s): 0

Entity ID: 5
Molecule	Chains	Sequence Length	Organism	Details	Image
Adhesion G-protein coupled receptor G6	E [auth R]	605	Homo sapiens	Mutation(s): 0  Gene Names: ADGRG6, DREG, GPR126, VIGR
UniProt & NIH Common Fund Data Resources
Find proteins for Q86SQ4 (Homo sapiens) Explore Q86SQ4  Go to UniProtKB:  Q86SQ4
PHAROS:  Q86SQ4 GTEx:  ENSG00000112414

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
OR9 (Subject of Investigation/LOI)	F [auth R]	(6aR)-6-methyl-5,6,6a,7-tetrahydro-4H-dibenzo[de,g]quinoline-10,11-diol C17 H17 N O2 VMWNQDUVQKEIOC-CYBMUJFWSA-N

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 2.90 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

EM Software:

Task	Software Package	Version
RECONSTRUCTION	cryoSPARC

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2026-02-11 
Deposition Author(s): Han, S., Wu, B., Zhao, Q.

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Funding Organization	Location	Grant Number
National Science Foundation (NSF, China)	China	32230052

Revision History  

• Version 1.0: 2026-02-11
  Type: Initial release
  
• Version 1.1: 2026-02-18
  Changes: Data collection, Database references