9VJT | pdb_00009vjt

Cryo-EM structure of MST-OR complex

• PDB DOI: https://doi.org/10.2210/pdb9VJT/pdb
• EM Map EMD-65122: EMDB EMDataResource

• Classification: MEMBRANE PROTEIN
• Organism(s): Homo sapiens, Mus musculus, Oplophorus gracilirostris
• Expression System: Spodoptera frugiperda
• Mutation(s): No 


• Deposited: 2025-06-21 Released: 2026-06-24 
• Deposition Author(s): Zhao, C., Fu, H., Tian, X.W., Cheng, L., Yan, W., Shao, Z.H.
• Funding Organization(s): National Natural Science Foundation of China (NSFC)

---

Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 2.97 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Literature

Cryo-EM structure of human receptor R2

Zhao, C., Tian, X.W., Liu, Y., Cheng, L., Yan, W., Shao, Z.H.

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: 181.51 kDa 
• Atom Count: 8,459 
• Modeled Residue Count: 1,071 
• Deposited Residue Count: 1,640 
• Unique protein chains: 5

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Guanine nucleotide-binding protein G(i) subunit alpha-1	A	354	Homo sapiens	Mutation(s): 0  Gene Names: GNAI1 EC: 3.6.5
UniProt & NIH Common Fund Data Resources
Find proteins for P63096 (Homo sapiens) Explore P63096  Go to UniProtKB:  P63096
PHAROS:  P63096 GTEx:  ENSG00000127955

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1	B	384	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
scFv16	D [auth E]	266	Mus musculus	Mutation(s): 0

Entity ID: 5
Molecule	Chains	Sequence Length	Organism	Details	Image
Mu-type opioid receptor,Oplophorus-luciferin 2-monooxygenase catalytic subunit	E [auth R]	565	Homo sapiens, Oplophorus gracilirostris This entity is chimeric	Mutation(s): 0  Gene Names: OPRM1, MOR1 EC: 1.13.12.13
UniProt & NIH Common Fund Data Resources
Find proteins for P35372 (Homo sapiens) Explore P35372  Go to UniProtKB:  P35372
PHAROS:  P35372 GTEx:  ENSG00000112038
Find proteins for Q9GV45 (Oplophorus gracilirostris) Explore Q9GV45  Go to UniProtKB:  Q9GV45
UniProt Groups	P35372Q9GV45

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
A1ESG( Subject of Investigation/LOI)	F [auth R]	Levomethadone C21 H27 N O USSIQXCVUWKGNF-QGZVFWFLSA-N

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 2.97 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: 2026-06-24 
Deposition Author(s): Zhao, C., Fu, H., Tian, X.W., Cheng, L., Yan, W., Shao, Z.H.

---

Funding Organization	Location	Grant Number
National Natural Science Foundation of China (NSFC)	China	32371288
National Natural Science Foundation of China (NSFC)	China	323B2038

Revision History  

• Version 1.0: 2026-06-24
  Type: Initial release