2YDO

Thermostabilised HUMAN A2a Receptor with adenosine bound


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Free: 0.269 
  • R-Value Work: 0.244 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Agonist-Bound Adenosine A(2A) Receptor Structures Reveal Common Features of Gpcr Activation.

Lebon, G.Warne, T.Edwards, P.C.Bennett, K.Langmead, C.J.Leslie, A.G.W.Tate, C.G.

(2011) Nature 474: 521

  • DOI: 10.1038/nature10136
  • Primary Citation of Related Structures:  2YDV
  • Also Cited By: 5G53

  • PubMed Abstract: 
  • Adenosine receptors and β-adrenoceptors are G-protein-coupled receptors (GPCRs) that activate intracellular G proteins on binding the agonists adenosine or noradrenaline, respectively. GPCRs have similar structures consisting of seven transmembrane h ...

    Adenosine receptors and β-adrenoceptors are G-protein-coupled receptors (GPCRs) that activate intracellular G proteins on binding the agonists adenosine or noradrenaline, respectively. GPCRs have similar structures consisting of seven transmembrane helices that contain well-conserved sequence motifs, indicating that they are probably activated by a common mechanism. Recent structures of β-adrenoceptors highlight residues in transmembrane region 5 that initially bind specifically to agonists rather than to antagonists, indicating that these residues have an important role in agonist-induced activation of receptors. Here we present two crystal structures of the thermostabilized human adenosine A(2A) receptor (A(2A)R-GL31) bound to its endogenous agonist adenosine and the synthetic agonist NECA. The structures represent an intermediate conformation between the inactive and active states, because they share all the features of GPCRs that are thought to be in a fully activated state, except that the cytoplasmic end of transmembrane helix 6 partially occludes the G-protein-binding site. The adenine substituent of the agonists binds in a similar fashion to the chemically related region of the inverse agonist ZM241385 (ref. 8). Both agonists contain a ribose group, not found in ZM241385, which extends deep into the ligand-binding pocket where it makes polar interactions with conserved residues in H7 (Ser 277(7.42) and His 278(7.43); superscripts refer to Ballesteros-Weinstein numbering) and non-polar interactions with residues in H3. In contrast, the inverse agonist ZM241385 does not interact with any of these residues and comparison with the agonist-bound structures indicates that ZM241385 sterically prevents the conformational change in H5 and therefore it acts as an inverse agonist. Comparison of the agonist-bound structures of A(2A)R with the agonist-bound structures of β-adrenoceptors indicates that the contraction of the ligand-binding pocket caused by the inward motion of helices 3, 5 and 7 may be a common feature in the activation of all GPCRs.


    Related Citations: 
    • Thermostabilisation of an Agonist-Bound Conformation of the Human Adenosine A(2A) Receptor.
      Lebon, G.,Bennett, K.,Jazayeri, A.,Tate, C.G.
      (2011) J.Mol.Biol. 409: 298


    Organizational Affiliation

    MRC Laboratory of Molecular Biology, Hills Road, Cambridge CB2 0QH, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ADENOSINE RECEPTOR A2A
A
325Homo sapiensGene Names: ADORA2A (ADORA2)
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
G Protein-Coupled Receptors (GPCRs)
Protein: 
A2A adenosine receptor
Find proteins for P29274 (Homo sapiens)
Go to Gene View: ADORA2A
Go to UniProtKB:  P29274
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ADN
Query on ADN

Download SDF File 
Download CCD File 
A
ADENOSINE
C10 H13 N5 O4
OIRDTQYFTABQOQ-KQYNXXCUSA-N
 Ligand Interaction
SOG
Query on SOG

Download SDF File 
Download CCD File 
A
2-HYDROXYMETHYL-6-OCTYLSULFANYL-TETRAHYDRO-PYRAN-3,4,5-TRIOL
1-S-OCTYL-BETA-D-THIOGLUCOSIDE
C14 H28 O5 S
CGVLVOOFCGWBCS-RGDJUOJXSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
ADNKi: 20 - 4550 nM (97) BINDINGDB
ADNEC50: 700 - 40000 nM (97) BINDINGDB
ADNKi: 30.9 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Free: 0.269 
  • R-Value Work: 0.244 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 76.465α = 90.00
b = 98.869β = 93.49
c = 79.516γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
PHASERphasing
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-05-18
    Type: Initial release
  • Version 1.1: 2011-06-16
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance