7EZK

Cryo-EM structure of an activated Cholecystokinin A receptor (CCKAR)-Gs complex

• PDB DOI: https://doi.org/10.2210/pdb7EZK/pdb
• EM Map EMD-31388: EMDB EMDataResource

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


• Deposited: 2021-06-01 Released: 2021-08-25 
• Deposition Author(s): Liu, Q.F., Yang, D.H., Zhuang, Y.W., Croll, T.I., Cai, X.Q., Duan, J., Dai, A.T., Yin, W.C., Ye, C.Y., Zhou, F.L., Wu, B.L., Zhao, Q., Xu, H.E., Wang, M.W., Jiang, Y.

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 3.10 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Literature

Ligand recognition and G-protein coupling selectivity of cholecystokinin A receptor

Liu, Q., Yang, D., Zhuang, Y., Croll, T.I., Cai, X., Dai, A., He, X., Duan, J., Yin, W., Ye, C., Zhou, F., Wu, B., Zhao, Q., Xu, H.E., Wang, M.W., Jiang, Y.

(2021) Nat Chem Biol 17: 1238-1244

• DOI: https://doi.org/10.1038/s41589-021-00841-3

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: 137.66 kDa 
• Atom Count: 7,196 
• Modelled Residue Count: 922 
• Deposited Residue Count: 1,220 
• Unique protein chains: 5

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Chimera of Guanine nucleotide-binding protein G(i) subunit alpha-1 and Guanine nucleotide-binding protein G(s) subunit alpha isoforms short	A	361	Homo sapiens	Mutation(s): 10  Gene Names: GNAI1, GNAS, GNAS1, GSP 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
Find proteins for P63092 (Homo sapiens) Explore P63092  Go to UniProtKB:  P63092
PHAROS:  P63092 GTEx:  ENSG00000087460
UniProt Groups	P63096P63092

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
Cholecystokinin receptor type A	C [auth D]	428	Homo sapiens	Mutation(s): 0  Gene Names: CCKAR, CCKRA Membrane Entity: Yes
UniProt & NIH Common Fund Data Resources
Find proteins for P32238 (Homo sapiens) Explore P32238  Go to UniProtKB:  P32238
PHAROS:  P32238 GTEx:  ENSG00000163394

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
Cholecystokinin-8	E [auth P]	9	Homo sapiens	Mutation(s): 0  Membrane Entity: Yes
UniProt & NIH Common Fund Data Resources
Find proteins for P06307 (Homo sapiens) Explore P06307  Go to UniProtKB:  P06307
PHAROS:  P06307 GTEx:  ENSG00000187094

Small Molecules

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
TYS	E [auth P]	L-PEPTIDE LINKING	C9 H11 N O6 S		TYR

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 3.10 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Structure Validation

Entry History 

Deposition Data

• Released Date: 2021-08-25 
Deposition Author(s): Liu, Q.F., Yang, D.H., Zhuang, Y.W., Croll, T.I., Cai, X.Q., Duan, J., Dai, A.T., Yin, W.C., Ye, C.Y., Zhou, F.L., Wu, B.L., Zhao, Q., Xu, H.E., Wang, M.W., Jiang, Y.

Revision History  

• Version 1.0: 2021-08-25
  Type: Initial release
  
• Version 1.1: 2022-06-29
  Changes: Database references
• Version 1.2: 2024-11-06
  Changes: Data collection, Structure summary