Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Homo 2-mer - A2 

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

Macromolecule Content

• Total Structure Weight: 87.79 kDa 
• Atom Count: 5,016 
• Modelled Residue Count: 681 
• Deposited Residue Count: 792 
• Unique protein chains: 1

 6IQL

Crystal structure of dopamine receptor D4 bound to the subtype-selective ligand, L745870

• PDB DOI:  https://doi.org/10.2210/pdb6IQL/pdb

• Classification: SIGNALING PROTEIN
• Organism(s): Mus musculus, Escherichia coli
• Expression System: Spodoptera frugiperda
• Mutation(s): Yes 
• Membrane Protein: Yes  OPMPDBTMMemProtMDmpstruc


• Deposited: 2018-11-08 Released: 2019-12-04 
• Deposition Author(s): Zhou, Y., Cao, C., Zhang, X.C.
• Funding Organization(s): Ministry of Science and Technology (China), National Natural Science Foundation of China, Chinese Academy of Sciences

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 3.50 Å
• R-Value Free: 0.336 
• R-Value Work: 0.306 
• R-Value Observed: 0.307 

Literature

Crystal structure of dopamine receptor D4 bound to the subtype selective ligand, L745870.

Zhou, Y., Cao, C., He, L., Wang, X., Zhang, X.C.

(2019) Elife 8

• PubMed: 31750832 
• DOI: https://doi.org/10.7554/eLife.48822
• Primary Citation of Related Structures:  
  6IQL


• PubMed Abstract: 
  

Multiple subtypes of dopamine receptors within the GPCR superfamily regulate neurological processes through various downstream signaling pathways. A crucial question about the dopamine receptor family is what structural features determine the subtype-selectivity of potential drugs. Here, we report the 3.5-angstrom crystal structure of mouse dopamine receptor D4 (DRD4) complexed with a subtype-selective antagonist, L745870. Our structure reveals a secondary binding pocket extended from the orthosteric ligand-binding pocket to a DRD4-specific crevice located between transmembrane helices 2 and 3. Additional mutagenesis studies suggest that the antagonist L745870 prevents DRD4 activation by blocking the relative movement between transmembrane helices 2 and 3. These results expand our knowledge of the molecular basis for the physiological functions of DRD4 and assist new drug design.

---

Organizational Affiliation: 

University of Chinese Academy of Sciences, Beijing, China.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
D(4) dopamine receptor,Soluble cytochrome b562,D(4) dopamine receptor	A, B	396	Mus musculus, Escherichia coli	Mutation(s): 6  Gene Names: Drd4, cybC Membrane Entity: Yes
UniProt
Find proteins for P0ABE7 (Escherichia coli) Explore P0ABE7  Go to UniProtKB:  P0ABE7
Find proteins for P51436 (Mus musculus) Explore P51436  Go to UniProtKB:  P51436
UniProt Groups	P0ABE7P51436

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
L74 (Subject of Investigation/LOI)	C [auth A], D [auth B]	3-{[4-(4-chlorophenyl)piperazin-1-yl]methyl}-1H-pyrrolo[2,3-b]pyridine C18 H19 Cl N4 OGJGQVFWEPNYSB-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 3.50 Å
• R-Value Free: 0.336 
• R-Value Work: 0.306 
• R-Value Observed: 0.307 
• Space Group: P 2₁ 2 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 46.7	α = 90
b = 142	β = 90
c = 146	γ = 90

Software Package:

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

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2019-12-04 
Deposition Author(s): Zhou, Y., Cao, C., Zhang, X.C.

---

Funding Organization	Location	Grant Number
Ministry of Science and Technology (China)	China	2015CB910104
National Natural Science Foundation of China	China	31470745
Chinese Academy of Sciences	China	XDB08020301

Revision History  

• Version 1.0: 2019-12-04
  Type: Initial release