8IYS | pdb_00008iys

TUG891-bound FFAR4 in complex with Gq

• PDB DOI: https://doi.org/10.2210/pdb8IYS/pdb
• EM Map EMD-35830: EMDB EMDataResource

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


• Deposited: 2023-04-06 Released: 2023-06-21 
• Deposition Author(s): He, Y., Yin, H.
• Funding Organization(s): National Natural Science Foundation of China (NSFC)

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 2.95 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Literature

Structural basis of omega-3 fatty acid receptor FFAR4 activation and G protein coupling selectivity.

Yin, H., Inoue, A., Ma, Z., Zhu, X., Xia, R., Xu, Z., Wang, N., Duan, Y., Zhang, A., Guo, C., He, Y.

(2023) Cell Res 33: 644-647

• PubMed: 37286793 
• DOI: https://doi.org/10.1038/s41422-023-00835-x
• Primary Citation Related Structures: 
  8H4I, 8H4K, 8H4L, 8IYS

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Organizational Affiliation: 
• Laboratory of Receptor Structure and Signaling, HIT Center for Life Sciences, School of Life Science and Technology, Harbin Institute of Technology, Harbin, Heilongjiang, China.
Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3, Aoba, Aramaki, Aoba-ku, Sendai, Miyagi, Japan.
Laboratory of Receptor Structure and Signaling, HIT Center for Life Sciences, School of Life Science and Technology, Harbin Institute of Technology, Harbin, Heilongjiang, 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: gel filtration

Macromolecule Content 

• Total Structure Weight: 154.92 kDa 
• Atom Count: 9,671 
• Modeled Residue Count: 1,269 
• Deposited Residue Count: 1,381 
• Unique protein chains: 5

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Guanine nucleotide-binding protein G(q) subunit alpha	A	357	Homo sapiens	Mutation(s): 0  Gene Names: GNAQ, GAQ EC: 3.6.5 Membrane Entity: Yes
UniProt & NIH Common Fund Data Resources
Find proteins for P50148 (Homo sapiens) Explore P50148  Go to UniProtKB:  P50148
PHAROS:  P50148 GTEx:  ENSG00000156052

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1	B	345	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
scFv16	C [auth E]	247	Homo sapiens	Mutation(s): 0

Entity ID: 4
Molecule	Chains	Sequence Length	Organism	Details	Image
Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2	D [auth G]	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
Free fatty acid receptor 4	E [auth R]	361	Homo sapiens	Mutation(s): 0  Gene Names: FFAR4, GPR120, GPR129, O3FAR1, PGR4 Membrane Entity: Yes
UniProt & NIH Common Fund Data Resources
Find proteins for Q5NUL3 (Homo sapiens) Explore Q5NUL3  Go to UniProtKB:  Q5NUL3
PHAROS:  Q5NUL3 GTEx:  ENSG00000186188

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
GDP	F [auth A]	GUANOSINE-5'-DIPHOSPHATE C10 H15 N5 O11 P2 QGWNDRXFNXRZMB-UUOKFMHZSA-N
YN9	G [auth R]	3-{4-[(4-fluoro-4'-methyl[1,1'-biphenyl]-2-yl)methoxy]phenyl}propanoic acid C23 H21 F O3 LPGBXHWIQNZEJB-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 2.95 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: 2023-06-21 
Deposition Author(s): He, Y., Yin, H.

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Funding Organization	Location	Grant Number
National Natural Science Foundation of China (NSFC)	China	32070048

Revision History  

• Version 1.0: 2023-06-21
  Type: Initial release
  
• Version 1.1: 2023-08-16
  Changes: Data collection, Database references
• Version 1.2: 2024-11-06
  Changes: Data collection, Structure summary
• Version 1.3: 2025-07-02
  Changes: Data collection