9OPW | pdb_00009opw

Structure of the sweet receptor in the apo state, extracellular domain

• PDB DOI: https://doi.org/10.2210/pdb9OPW/pdb
• EM Map EMD-70727: EMDB EMDataResource

• Classification: SIGNALING PROTEIN
• Organism(s): Homo sapiens, Mus musculus
• Expression System: Homo sapiens
• Mutation(s): No 


• Deposited: 2025-05-20 Released: 2025-09-03 
• Deposition Author(s): Wang, H., Chen, X., Dai, Y., Lee, C.H.
• Funding Organization(s): National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 2.86 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Literature

Structure and activation mechanism of human sweet taste receptor.

Wang, H., Chen, X., Dai, Y., Pidathala, S., Niu, Y., Zhao, C., Li, S., Wang, L., Lee, C.H.

(2025) Cell Res 35: 775-778

• PubMed: 40754567 
• DOI: https://doi.org/10.1038/s41422-025-01156-x
• Primary Citation Related Structures: 
  9OPW, 9OPX, 9OPY, 9OPZ, 9OQ0, 9OQ1, 9OQ2, 9OQ3, 9OQ4, 9OQ5, 9OQ6

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Organizational Affiliation: 
• Department of Structural Biology, St. Jude Children's Research Hospital, Memphis, TN, USA.
Laboratory of Chromosome and Cell Biology, The Rockefeller University, New York, NY, USA.
Department of Biochemistry and Molecular Biology, University of Florida, Gainesville, FL, USA.
Department of Structural Biology, St. Jude Children's Research Hospital, Memphis, TN, USA. [e-mail].

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - A1B1 Pseudo Symmetry: Cyclic - C2  (Explore in 3D)
Pseudo Stoichiometry: Homo 2-mer - A2 

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

Biological Assembly Evidence: electron microscopy

Macromolecule Content 

• Total Structure Weight: 120.97 kDa 
• Atom Count: 8,106 
• Modeled Residue Count: 1,021 
• Deposited Residue Count: 1,072 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Taste receptor type 1 member 2	A	531	Homo sapiens	Mutation(s): 0  Gene Names: TAS1R2, GPR71, T1R2, TR2
UniProt & NIH Common Fund Data Resources
Find proteins for Q8TE23 (Homo sapiens) Explore Q8TE23  Go to UniProtKB:  Q8TE23
PHAROS:  Q8TE23 GTEx:  ENSG00000179002

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Taste receptor type 1 member 3	B	541	Mus musculus	Mutation(s): 0  Gene Names: Tas1r3, Sac, T1r3, Tr3
UniProt
Find proteins for Q925D8 (Mus musculus) Explore Q925D8  Go to UniProtKB:  Q925D8

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 2.86 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: 2025-09-03 
Deposition Author(s): Wang, H., Chen, X., Dai, Y., Lee, C.H.

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Funding Organization	Location	Grant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)	United States	GM143282

Revision History  

• Version 1.0: 2025-09-03
  Type: Initial release
  
• Version 1.1: 2025-11-19
  Changes: Data collection, Database references