5G53

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

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.40 Å
  • R-Value Free: 0.315 
  • R-Value Work: 0.284 
  • R-Value Observed: 0.285 

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This is version 1.4 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
  • Primary Citation of Related Structures:  
    5G53

  • 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 active conformation coupled to a G protein are necessary ...

    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
    Organizational Affiliation: 

    Institute of Biochemistry, Heinrich-Heine University Düsseldorf, 40225 Düsseldorf, Germany. Electronic address: lutz.schmitt@hhu.de.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
ADENOSINE RECEPTOR A2AA, B314Homo sapiensMutation(s): 1 
Gene Names: ADORA2A, ADORA2
Membrane Entity: Yes 
UniProt & NIH Common Fund Data Resources
Find proteins for P29274 (Homo sapiens)
Explore P29274 
Go to UniProtKB:  P29274
PHAROS:  P29274
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP29274
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
ENGINEERED DOMAIN OF HUMAN G ALPHA S LONG ISOFORMC, D229Homo sapiensMutation(s): 7 
Gene Names: GNAS, GNAS1, GSP
Membrane Entity: Yes 
UniProt & NIH Common Fund Data Resources
Find proteins for P63092 (Homo sapiens)
Explore P63092 
Go to UniProtKB:  P63092
PHAROS:  P63092
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP63092
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GDP
Query on GDP
Download Ideal Coordinates CCD File 
I [auth C]GUANOSINE-5'-DIPHOSPHATE
C10 H15 N5 O11 P2
QGWNDRXFNXRZMB-UUOKFMHZSA-N		 Ligand Interaction
SOG
Query on SOG
Download Ideal Coordinates CCD File 
F [auth A],
G [auth A]		octyl 1-thio-beta-D-glucopyranoside
C14 H28 O5 S
CGVLVOOFCGWBCS-RGDJUOJXSA-N		 Ligand Interaction
NEC
Query on NEC
Download Ideal Coordinates CCD File 
E [auth A],
H [auth B]		N-ETHYL-5'-CARBOXAMIDO ADENOSINE
C12 H16 N6 O4
JADDQZYHOWSFJD-FLNNQWSLSA-N		 Ligand Interaction
Binding Affinity Annotations 
IDSourceBinding Affinity
NEC BindingDB:  5G53 Ki: min: 1, max: 1.00e+4 (nM) from 39 assay(s)
IC50: min: 3.7, max: 366 (nM) from 8 assay(s)
EC50: min: 2.5, max: 394 (nM) from 15 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.40 Å
  • R-Value Free: 0.315 
  • R-Value Work: 0.284 
  • R-Value Observed: 0.285 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 90.632α = 90
b = 111.814β = 90
c = 161.304γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
MOSFLMdata reduction
Aimlessdata scaling
PHASERphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2016-08-03
    Type: Initial release
  • Version 1.1: 2016-08-10
    Changes: Database references
  • Version 1.2: 2016-08-24
    Changes: Database references
  • Version 1.3: 2017-03-08
    Changes: Database references
  • Version 1.4: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Advisory, Derived calculations, Other, Structure summary