5G53

Structure of the adenosine A2A receptor bound to an engineered G protein

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.4 Å
  • R-Value Free: 0.315 
  • R-Value Work: 0.284 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history. 

Literature

Structure of the Adenosine A2A Receptor Bound to an Engineered G Protein

Carpenter, B., Nehme, R., Warne, T., Leslie, A.G.W., Tate, C.G.

(2016) Nature 536: 104

  • DOI: 10.1038/nature18966

  • PubMed Abstract: 

    • G-protein-coupled receptors (GPCRs) are essential components of the signalling network throughout the body. To understand the molecular mechanism of G-protein-mediated signalling, solved structures of receptors in inactive conformations and in the ac ...

    G-protein-coupled receptors (GPCRs) are essential components of the signalling network throughout the body. To understand the molecular mechanism of G-protein-mediated signalling, solved structures of receptors in inactive conformations and in the active conformation coupled to a G protein are necessary. Here we present the structure of the adenosine A(2A) receptor (A(2A)R) bound to an engineered G protein, mini-Gs, at 3.4 Å resolution. Mini-Gs binds to A(2A)R through an extensive interface (1,048 Å2) that is similar, but not identical, to the interface between Gs and the β2-adrenergic receptor. The transition of the receptor from an agonist-bound active-intermediate state to an active G-protein-bound state is characterized by a 14 Å shift of the cytoplasmic end of transmembrane helix 6 (H6) away from the receptor core, slight changes in the positions of the cytoplasmic ends of H5 and H7 and rotamer changes of the amino acid side chains Arg3.50, Tyr5.58 and Tyr7.53. There are no substantial differences in the extracellular half of the receptor around the ligand binding pocket. The A(2A)R-mini-Gs structure highlights both the diversity and similarity in G-protein coupling to GPCRs and hints at the potential complexity of the molecular basis for G-protein specificity.

    Related Citations: 
    • Agonist-Bound Adenosine A2A 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
    • Engineering a minimal G protein to facilitate crystallisation of G protein-coupled receptors in their active conformation.
      Carpenter, B.,Tate, C.G.
      (2016) Protein Eng. Des. Sel. 29: 583



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ADENOSINE RECEPTOR A2A
A, B
314Homo sapiensMutation(s): 1 
Gene 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
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
ENGINEERED DOMAIN OF HUMAN G ALPHA S LONG ISOFORM
C, D
229Homo sapiensMutation(s): 7 
Gene Names: GNAS (GNAS1, GSP)
Membrane protein
mpstruct		Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL		Sub Group: 
G Protein-Coupled Receptors (GPCRs)		Protein: 
A2A adenosine receptor
Find proteins for P63092 (Homo sapiens)
Go to Gene View: GNAS
Go to UniProtKB:  P63092
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GDP
Query on GDP
Download SDF File 
Download CCD File 
C
GUANOSINE-5'-DIPHOSPHATE
C10 H15 N5 O11 P2
QGWNDRXFNXRZMB-UUOKFMHZSA-N
 Ligand Interaction
NEC
Query on NEC
Download SDF File 
Download CCD File 
A, B
N-ETHYL-5'-CARBOXAMIDO ADENOSINE
C12 H16 N6 O4
JADDQZYHOWSFJD-FLNNQWSLSA-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 %)
NECIC50: 3.7 - 366 nM (99) BINDINGDB
NECEC50: 13 - 394 nM (99) BINDINGDB
NECKi: 1 - >10000 nM (99) BINDINGDB
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.4 Å
  • R-Value Free: 0.315 
  • R-Value Work: 0.284 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 90.632α = 90.00
b = 111.814β = 90.00
c = 161.304γ = 90.00
Software Package:
Software NamePurpose
MOSFLMdata reduction
REFMACrefinement
Aimlessdata scaling
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots


View more in-depth experimental data

Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2016-08-03
    Type: Initial release
  • Version 1.1: 2016-08-10
    Type: Database references
  • Version 1.2: 2016-08-24
    Type: Database references
  • Version 1.3: 2017-03-08
    Type: Database references