6GDG

Cryo-EM structure of the adenosine A2A receptor bound to a miniGs heterotrimer


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.11 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Cryo-EM structure of the adenosine A2Areceptor coupled to an engineered heterotrimeric G protein.

Garcia-Nafria, J.Lee, Y.Bai, X.Carpenter, B.Tate, C.G.

(2018) Elife 7: --

  • DOI: 10.7554/eLife.35946

  • PubMed Abstract: 
  • The adenosine A <sub>2A </sub> receptor (A <sub>2A </sub>R) is a prototypical G protein-coupled receptor (GPCR) that couples to the heterotrimeric G protein G <sub>S </sub>. Here, we determine the structure by electron cryo-microscopy (cryo-EM) of A ...

    The adenosine A 2A receptor (A 2A R) is a prototypical G protein-coupled receptor (GPCR) that couples to the heterotrimeric G protein G S . Here, we determine the structure by electron cryo-microscopy (cryo-EM) of A 2A R at pH 7.5 bound to the small molecule agonist NECA and coupled to an engineered heterotrimeric G protein, which contains mini-G S , the βγ subunits and nanobody Nb35. Most regions of the complex have a resolution of ~3.8 Å or better. Comparison with the 3.4 Å resolution crystal structure shows that the receptor and mini-G S are virtually identical and that the density of the side chains and ligand are of comparable quality. However, the cryo-EM density map also indicates regions that are flexible in comparison to the crystal structures, which unexpectedly includes regions in the ligand binding pocket. In addition, an interaction between intracellular loop 1 of the receptor and the β subunit of the G protein was observed.


    Organizational Affiliation

    MRC Laboratory of Molecular Biology, Cambridge, United Kingdom.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
TrxA,Adenosine receptor A2a
A
479Homo sapiensEscherichia coli (strain K12)
This entity is chimeric
Mutation(s): 0 
Gene Names: ADORA2A (ADORA2), trxA (fipA, tsnC)
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 Gene View: ADORA2A
Go to UniProtKB:  P29274
Find proteins for P0AA25 (Escherichia coli (strain K12))
Go to UniProtKB:  P0AA25
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
B
339Homo sapiensMutation(s): 0 
Gene Names: GNB1
Membrane protein
mpstruc
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
G Protein-Coupled Receptors (GPCRs)
Protein: 
A2A adenosine receptor
Find proteins for P62873 (Homo sapiens)
Go to Gene View: GNB1
Go to UniProtKB:  P62873
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
C
71Homo sapiensMutation(s): 0 
Gene Names: GNG2
Membrane protein
mpstruc
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
G Protein-Coupled Receptors (GPCRs)
Protein: 
A2A adenosine receptor
Find proteins for P59768 (Homo sapiens)
Go to Gene View: GNG2
Go to UniProtKB:  P59768
Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
Guanine nucleotide-binding protein G(s) subunit alpha isoforms short,Guanine nucleotide-binding protein G(s) subunit alpha isoforms short
D
248Homo sapiensMutation(s): 0 
Gene Names: GNAS (GNAS1, GSP)
Membrane protein
mpstruc
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
Entity ID: 5
MoleculeChainsSequence LengthOrganismDetails
nanobody Nb35
E
156N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NEC
Query on NEC

Download SDF File 
Download CCD File 
A
N-ETHYL-5'-CARBOXAMIDO ADENOSINE
C12 H16 N6 O4
JADDQZYHOWSFJD-FLNNQWSLSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.11 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
European Research CouncilUnited KingdomEMPSI 339995
Medical Research Council (United Kingdom)United KingdomMRC U105197215

Revision History 

  • Version 1.0: 2018-05-16
    Type: Initial release