8J23 | pdb_00008j23

Cryo-EM structure of FFAR2 complex in apo state

• PDB DOI: https://doi.org/10.2210/pdb8J23/pdb
• EM Map EMD-35943: EMDB EMDataResource

• Classification: MEMBRANE PROTEIN
• Organism(s): Homo sapiens
• Expression System: Spodoptera frugiperda
• Mutation(s): Yes 
• Membrane Protein: Yes  PDBTM


• Deposited: 2023-04-14 Released: 2024-04-17 
• Deposition Author(s): Tai, L., Li, F., Sun, X., Tang, W., Wang, J.
• Funding Organization(s): Not funded

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 3.20 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Literature

Molecular recognition and activation mechanism of short chain fatty acid receptors FFAR2 and FFAR3

Tai, L., Li, F., Sun, X., Tang, W., Wang, J.

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: 156.46 kDa 
• Atom Count: 8,596 
• Modeled Residue Count: 1,101 
• Deposited Residue Count: 1,410 
• Unique protein chains: 5

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Free fatty acid receptor 2	A	311	Homo sapiens	Mutation(s): 4  Gene Names: FFAR2, FFA2, GPCR43, GPR43 Membrane Entity: Yes
UniProt & NIH Common Fund Data Resources
Find proteins for O15552 (Homo sapiens) Explore O15552  Go to UniProtKB:  O15552
PHAROS:  O15552 GTEx:  ENSG00000126262

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Guanine nucleotide-binding protein G(i) subunit alpha-1	B	354	Homo sapiens	Mutation(s): 0  Gene Names: GNAI1 EC: 3.6.5 Membrane Entity: Yes
UniProt & NIH Common Fund Data Resources
Find proteins for P63096 (Homo sapiens) Explore P63096  Go to UniProtKB:  P63096
PHAROS:  P63096 GTEx:  ENSG00000127955

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1	C	377	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: 4
Molecule	Chains	Sequence Length	Organism	Details	Image
Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2	D	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: 5
Molecule	Chains	Sequence Length	Organism	Details	Image
scFV16	E [auth F]	297	Homo sapiens	Mutation(s): 0

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 3.20 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: 2024-04-17 
Deposition Author(s): Tai, L., Li, F., Sun, X., Tang, W., Wang, J.

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Funding Organization	Location	Grant Number
Not funded		--

Revision History  

• Version 1.0: 2024-04-17
  Type: Initial release
  
• Version 1.1: 2024-10-16
  Changes: Data collection, Structure summary
• Version 1.2: 2025-07-23
  Changes: Data collection