Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

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

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

Macromolecule Content

• Total Structure Weight: 57.17 kDa 
• Atom Count: 3757 
• Residue Count: 448 
• Unique protein chains: 1

3EML

The 2.6 A Crystal Structure of a Human A2A Adenosine Receptor bound to ZM241385.

• DOI: 10.2210/pdb3EML/pdb

• Classification: MEMBRANE PROTEIN, RECEPTOR
• Organism(s): Homo sapiens, Escherichia virus T4
• Expression System: Spodoptera frugiperda
• Mutation(s): No 


• Deposited: 2008-09-24 Released: 2008-10-14 
• Deposition Author(s): Jaakola, V.-P., Griffith, M.T., Hanson, M.A., Cherezov, V., Chien, E.Y.T., Lane, J.R., Ijzerman, A.P., Stevens, R.C., Accelerated Technologies Center for Gene to 3D Structure (ATCG3D), GPCR Network (GPCR)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.60 Å
• R-Value Free: 0.231 
• R-Value Work: 0.196 
• R-Value Observed: 0.198 

Literature

The 2.6 Angstrom Crystal Structure of a Human A2A Adenosine Receptor Bound to an Antagonist.

Jaakola, V.P., Griffith, M.T., Hanson, M.A., Cherezov, V., Chien, E.Y., Lane, J.R., Ijzerman, A.P., Stevens, R.C.

(2008) Science 322: 1211-1217

• PubMed: 18832607 
• DOI: 10.1126/science.1164772
• Structures With Same Primary Citation


• PubMed Abstract: 
  

The adenosine class of heterotrimeric guanine nucleotide-binding protein (G protein)-coupled receptors (GPCRs) mediates the important role of extracellular adenosine in many physiological processes and is antagonized by caffeine. We have determined the crystal structure of the human A2A adenosine receptor, in complex with a high-affinity subtype-selective antagonist, ZM241385, to 2.6 angstrom resolution. Four disulfide bridges in the extracellular domain, combined with a subtle repacking of the transmembrane helices relative to the adrenergic and rhodopsin receptor structures, define a pocket distinct from that of other structurally determined GPCRs. The arrangement allows for the binding of the antagonist in an extended conformation, perpendicular to the membrane plane. The binding site highlights an integral role for the extracellular loops, together with the helical core, in ligand recognition by this class of GPCRs and suggests a role for ZM241385 in restricting the movement of a tryptophan residue important in the activation mechanism of the class A receptors.

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Organizational Affiliation: 

Department of Molecular Biology, The Scripps Research Institute, La Jolla, CA 92037 USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
Human Adenosine A2A receptor/T4 lysozyme chimera	A	488	Homo sapiens, Escherichia virus T4	Mutation(s): 0  Gene Names: ADORA2A EC: 3.2.1.17
Membrane protein Mpstruc	Group:  TRANSMEMBRANE PROTEINS: ALPHA-HELICAL		Sub Group:  G Protein-Coupled Receptors (GPCRs)	Protein:  A2A adenosine receptor
Find proteins for P29274 (Homo sapiens) Go to UniProtKB:  P29274
NIH Common Fund Data Resources
PHAROS  P29274 GTEx  ENSG00000128271
Find proteins for P00720 (Enterobacteria phage T4) Go to UniProtKB:  P00720

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
ZMA	A	4-{2-[(7-amino-2-furan-2-yl[1,2,4]triazolo[1,5-a][1,3,5]triazin-5-yl)amino]ethyl}phenol C16 H15 N7 O2 PWTBZOIUWZOPFT-UHFFFAOYSA-N
STE	A	STEARIC ACID C18 H36 O2 QIQXTHQIDYTFRH-UHFFFAOYSA-N
SO4	A	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L

External Ligand Annotations
ID	Binding Affinity (Sequence Identity %)
ZMA	Ki:  0.9300000071525574   nM  BindingDB
ZMA	IC50:  1.5   nM  BindingDB
ZMA	Ki:  0.30000001192092896   nM  BindingDB
ZMA	Ki:  1.2000000476837158   nM  BindingDB
ZMA	IC50:  0.6800000071525574   nM  BindingDB
ZMA	Ki:  0.10000000149011612   nM  BindingDB
ZMA	Ki:  1.600000023841858   nM  BindingDB
ZMA	Ki:  5.300000190734863   nM  BindingDB
ZMA	Kd:  1.7999999523162842   nM  PDBBind
ZMA	Ki:  64   nM  BindingDB
ZMA	Ki:  0.800000011920929   nM  BindingDB
ZMA	Ki:  1.399999976158142   nM  BindingDB
ZMA	IC50:  33   nM  BindingDB
ZMA	Ki:  0.9100000262260437   nM  BindingDB
ZMA	Ki:  1.899999976158142   nM  BindingDB
ZMA	Kd:  0.2199999988079071   nM  BindingDB
ZMA	Ki:  2   nM  BindingDB

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.60 Å
• R-Value Free: 0.231 
• R-Value Work: 0.196 
• R-Value Observed: 0.198 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 47.736	α = 90
b = 76.932	β = 101.32
c = 86.553	γ = 90

Software Package:

Software Name	Purpose
Blu-Ice	data collection
PHASER	phasing
PHENIX	refinement
XDS	data reduction
XSCALE	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2008-09-24 
• Released Date: 2008-10-14 
Deposition Author(s): Jaakola, V.-P., Griffith, M.T., Hanson, M.A., Cherezov, V., Chien, E.Y.T., Lane, J.R., Ijzerman, A.P., Stevens, R.C., Accelerated Technologies Center for Gene to 3D Structure (ATCG3D), GPCR Network (GPCR)

Revision History 

• Version 1.0: 2008-10-14
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Version format compliance
• Version 1.2: 2012-08-08
  Changes: Other
• Version 1.3: 2017-08-02
  Changes: Refinement description, Source and taxonomy