3UZC

Thermostabilised Adenosine A2A receptor in complex with 4-(3-amino-5-phenyl-1,2,4-triazin-6-yl)-2-chlorophenol

• PDB DOI: https://doi.org/10.2210/pdb3UZC/pdb

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


• Deposited: 2011-12-07 Released: 2012-03-21 
• Deposition Author(s): Congreve, M., Andrews, S.P., Dore, A.S., Hollenstein, K., Hurrell, E., Langmead, C.J., Mason, J.S., Ng, I.W., Zhukov, A., Weir, M., Marshall, F.H.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 3.34 Å
• R-Value Free: 0.290 
• R-Value Work: 0.282 
• R-Value Observed: 0.282 

Starting Model: experimental

Literature

Discovery of 1,2,4-Triazine Derivatives as Adenosine A(2A) Antagonists using Structure Based Drug Design

Congreve, M., Andrews, S.P., Dore, A.S., Hollenstein, K., Hurrell, E., Langmead, C.J., Mason, J.S., Ng, I.W., Tehan, B., Zhukov, A., Weir, M., Marshall, F.H.

(2012) J Med Chem 55: 1898-1903

• PubMed: 22220592 
• DOI: https://doi.org/10.1021/jm201376w
• Primary Citation of Related Structures:  
  3UZA, 3UZC


• PubMed Abstract: 
  

  Potent, ligand efficient, selective, and orally efficacious 1,2,4-triazine derivatives have been identified using structure based drug design approaches as antagonists of the adenosine A(2A) receptor. The X-ray crystal structures of compounds 4e and 4g bound to the GPCR illustrate that the molecules bind deeply inside the orthosteric binding cavity. In vivo pharmacokinetic and efficacy data for compound 4k are presented, demonstrating the potential of this series of compounds for the treatment of Parkinson's disease.

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Organizational Affiliation: 

Heptares Therapeutics Limited, BioPark, Broadwater Road, Welwyn Garden City, Hertfordshire AL7 3AX, UK. [e-mail]

Biological Assembly 1  

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

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

Macromolecule Content

• Total Structure Weight: 36.78 kDa 
• Atom Count: 2,271 
• Modelled Residue Count: 291 
• Deposited Residue Count: 329 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Adenosine A2A Receptor	A	329	Homo sapiens	Mutation(s): 8  Gene Names: ADORA2A Membrane Entity: Yes
UniProt & NIH Common Fund Data Resources
Find proteins for P29274 (Homo sapiens) Explore P29274  Go to UniProtKB:  P29274
PHAROS:  P29274 GTEx:  ENSG00000128271

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
T4E	B [auth A]	4-(3-amino-5-phenyl-1,2,4-triazin-6-yl)-2-chlorophenol C15 H11 Cl N4 O ZHUZHTHIEMXLRA-UHFFFAOYSA-N

Binding Affinity Annotations
ID	Source	Binding Affinity
T4E	BindingDB:  3UZC	Ki: min: 1.38, max: 4 (nM) from 3 assay(s)
	PDBBind:  3UZC	Kd: 0.25 (nM) from 1 assay(s)

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 3.34 Å
• R-Value Free: 0.290 
• R-Value Work: 0.282 
• R-Value Observed: 0.282 
• Space Group: I 2 2 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 110.7	α = 90
b = 112.064	β = 90
c = 126.9	γ = 90

Software Package:

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

Structure Validation

Entry History 

Deposition Data

• Released Date: 2012-03-21 
Deposition Author(s): Congreve, M., Andrews, S.P., Dore, A.S., Hollenstein, K., Hurrell, E., Langmead, C.J., Mason, J.S., Ng, I.W., Zhukov, A., Weir, M., Marshall, F.H.

Revision History  

• Version 1.0: 2012-03-21
  Type: Initial release
  
• Version 1.1: 2023-11-08
  Changes: Data collection, Database references, Derived calculations, Refinement description
• Version 1.2: 2024-10-30
  Changes: Structure summary