Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 60.86 kDa 
• Atom Count: 3,499 
• Modelled Residue Count: 438 
• Deposited Residue Count: 534 
• Unique protein chains: 1

 7F8Y

Crystal structure of the cholecystokinin receptor CCKAR in complex with devazepide

• PDB DOI: 10.2210/pdb7F8Y/pdb

• Classification: STRUCTURAL PROTEIN
• Organism(s): Homo sapiens, Escherichia virus T4
• Expression System: Spodoptera frugiperda
• Mutation(s): Yes 
• Membrane Protein: Yes  MemProtMDmpstruc


• Deposited: 2021-07-02 Released: 2021-10-13 
• Deposition Author(s): Zhang, X., He, C., Wang, M., Zhou, Q., Yang, D., Zhu, Y., Wu, B., Zhao, Q.
• Funding Organization(s): National Science Foundation (NSF, China)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.50 Å
• R-Value Free: 0.268 
• R-Value Work: 0.215 
• R-Value Observed: 0.220 

Literature

Structures of the human cholecystokinin receptors bound to agonists and antagonists.

Zhang, X., He, C., Wang, M., Zhou, Q., Yang, D., Zhu, Y., Feng, W., Zhang, H., Dai, A., Chu, X., Wang, J., Yang, Z., Jiang, Y., Sensfuss, U., Tan, Q., Han, S., Reedtz-Runge, S., Xu, H.E., Zhao, S., Wang, M.W., Wu, B., Zhao, Q.

(2021) Nat Chem Biol 17: 1230-1237

• PubMed: 34556863 
• DOI: 10.1038/s41589-021-00866-8
• Primary Citation of Related Structures:  
  7F8U, 7F8V, 7F8W, 7F8X, 7F8Y


• PubMed Abstract: 
  

Cholecystokinin receptors, CCK _A R and CCK _B R, are important neurointestinal peptide hormone receptors and play a vital role in food intake and appetite regulation. Here, we report three crystal structures of the human CCK _A R in complex with different ligands, including one peptide agonist and two small-molecule antagonists, as well as two cryo-electron microscopy structures of CCK _B R-gastrin in complex with G _i2 and G _q , respectively. These structures reveal the recognition pattern of different ligand types and the molecular basis of peptide selectivity in the cholecystokinin receptor family. By comparing receptor structures in different conformational states, a stepwise activation process of cholecystokinin receptors is proposed. Combined with pharmacological data, our results provide atomic details for differential ligand recognition and receptor activation mechanisms. These insights will facilitate the discovery of potential therapeutics targeting cholecystokinin receptors.

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Organizational Affiliation: 

Zhongshan Institute for Drug Discovery, The Institutes of Drug Discovery and Development, Chinese Aacademy of Sciences, Guangdong, China. [e-mail].

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
fusion protein of Cholecystokinin receptor type A and Endolysin	A	534	Homo sapiens, Escherichia virus T4	Mutation(s): 6  Gene Names: CCKAR, CCKRA, E EC: 3.2.1.17 Membrane Entity: Yes
UniProt & NIH Common Fund Data Resources
Find proteins for P32238 (Homo sapiens) Explore P32238  Go to UniProtKB:  P32238
PHAROS:  P32238
Find proteins for P00720 (Enterobacteria phage T4) Explore P00720  Go to UniProtKB:  P00720
UniProt Groups	P32238P00720

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
1OZ (Subject of Investigation/LOI)	B [auth A]	N-[(3S)-1-methyl-2-oxidanylidene-5-phenyl-3H-1,4-benzodiazepin-3-yl]-1H-indole-2-carboxamide C25 H20 N4 O2 NFHRQQKPEBFUJK-HSZRJFAPSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.50 Å
• R-Value Free: 0.268 
• R-Value Work: 0.215 
• R-Value Observed: 0.220 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 54.78	α = 90
b = 72.42	β = 107.284
c = 86.14	γ = 90

Software Package:

Software Name	Purpose
PHENIX	refinement
XDS	data reduction
XSCALE	data scaling
PHASER	phasing

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2021-10-13 
Deposition Author(s): Zhang, X., He, C., Wang, M., Zhou, Q., Yang, D., Zhu, Y., Wu, B., Zhao, Q.

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Funding Organization	Location	Grant Number
National Science Foundation (NSF, China)	China	21704064
National Science Foundation (NSF, China)	China	81773792
National Science Foundation (NSF, China)	China	81973373
National Science Foundation (NSF, China)	China	31800621
National Science Foundation (NSF, China)	China	31770796
National Science Foundation (NSF, China)	China	31971178
National Science Foundation (NSF, China)	China	81872915
National Science Foundation (NSF, China)	China	82073904
National Science Foundation (NSF, China)	China	31825010
National Science Foundation (NSF, China)	China	81525024

Revision History  

• Version 1.0: 2021-10-13
  Type: Initial release
  
• Version 1.1: 2022-02-16
  Changes: Database references