3QAK

Agonist bound structure of the human adenosine A2a receptor

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.71 Å
  • R-Value Free: 0.273 
  • R-Value Work: 0.217 
  • R-Value Observed: 0.220 

wwPDB Validation 3D Report Full Report


This is version 1.5 of the entry. See complete history. 


Literature

Structure of an agonist-bound human A2A adenosine receptor.

Xu, F., Wu, H., Katritch, V., Han, G.W., Jacobson, K.A., Gao, Z.G., Cherezov, V., Stevens, R.C.

(2011) Science 332: 322-327

  • DOI: 10.1126/science.1202793
  • Primary Citation of Related Structures:  
    3QAK

  • PubMed Abstract: 

    • Activation of G protein-coupled receptors upon agonist binding is a critical step in the signaling cascade for this family of cell surface proteins. We report the crystal structure of the A(2A) adenosine receptor (A(2A)AR) bound to an agonist UK-4320 ...

    Activation of G protein-coupled receptors upon agonist binding is a critical step in the signaling cascade for this family of cell surface proteins. We report the crystal structure of the A(2A) adenosine receptor (A(2A)AR) bound to an agonist UK-432097 at 2.7 angstrom resolution. Relative to inactive, antagonist-bound A(2A)AR, the agonist-bound structure displays an outward tilt and rotation of the cytoplasmic half of helix VI, a movement of helix V, and an axial shift of helix III, resembling the changes associated with the active-state opsin structure. Additionally, a seesaw movement of helix VII and a shift of extracellular loop 3 are likely specific to A(2A)AR and its ligand. The results define the molecule UK-432097 as a "conformationally selective agonist" capable of receptor stabilization in a specific active-state configuration.

    Organizational Affiliation: 

    Department of Molecular Biology, Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Adenosine receptor A2a,lysozyme chimeraA488Homo sapiens, Escherichia virus T4Mutation(s): 2 
Gene Names: ADORA2, ADORA2A, E
EC: 3.2.1.17
Membrane protein
Mpstruc		Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL		Sub Group: 
G Protein-Coupled Receptors (GPCRs): Class A		Protein: 
A2A adenosine receptor with bound agonist (UK-432097)
Find proteins for P29274 (Homo sapiens)
Explore P29274 
Go to UniProtKB:  P29274
NIH Common Fund Data Resources
PHAROS  P29274
GTEx  ENSG00000128271
Find proteins for P00720 (Enterobacteria phage T4)
Explore P00720 
Go to UniProtKB:  P00720
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
UKA
Query on UKA
Download CCD File 
A
6-(2,2-diphenylethylamino)-9-[(2R,3R,4S,5S)-5-(ethylcarbamoyl)-3,4-dihydroxy-oxolan-2-yl]-N-[2-[(1-pyridin-2-ylpiperidin-4-yl)carbamoylamino]ethyl]purine-2-carboxamide
C40 H47 N11 O6
ZOTHAEBAWXWVID-HXEFRTELSA-N		 Ligand Interaction
OLC
Query on OLC
Download CCD File 
A
(2R)-2,3-dihydroxypropyl (9Z)-octadec-9-enoate
C21 H40 O4
RZRNAYUHWVFMIP-GDCKJWNLSA-N		 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
UKAIC50:  4   nM  BindingDB
UKAKi :  4.75   nM  PDBBind
UKAKi:  4   nM  BindingDB
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.71 Å
  • R-Value Free: 0.273 
  • R-Value Work: 0.217 
  • R-Value Observed: 0.220 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 47.836α = 90
b = 78.944β = 100.54
c = 86.579γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
PHASERphasing
REFMACrefinement
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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View more in-depth experimental data

Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-03-09
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2012-05-02
    Changes: Structure summary
  • Version 1.3: 2012-10-10
    Changes: Database references
  • Version 1.4: 2017-07-26
    Changes: Refinement description, Source and taxonomy
  • Version 1.5: 2018-01-24
    Changes: Structure summary