6VMS

Structure of a D2 dopamine receptor-G-protein complex in a lipid membrane

Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.80 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

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This is version 1.2 of the entry. See complete history. 


Literature

Structure of a D2 dopamine receptor-G-protein complex in a lipid membrane.

Yin, J., Chen, K.M., Clark, M.J., Hijazi, M., Kumari, P., Bai, X.C., Sunahara, R.K., Barth, P., Rosenbaum, D.M.

(2020) Nature 584: 125-129

  • DOI: 10.1038/s41586-020-2379-5
  • Primary Citation of Related Structures:  
    6VMS

  • PubMed Abstract: 

    • The D2 dopamine receptor (DRD2) is a therapeutic target for Parkinson's disease 1 and antipsychotic drugs 2 . DRD2 is activated by the endogenous neurotransmitter dopamine and synthetic agonist drugs such as bromocriptine 3 , leading to stimulation of G i and inhibition of adenylyl cyclase ...

    The D2 dopamine receptor (DRD2) is a therapeutic target for Parkinson's disease 1 and antipsychotic drugs 2 . DRD2 is activated by the endogenous neurotransmitter dopamine and synthetic agonist drugs such as bromocriptine 3 , leading to stimulation of G i and inhibition of adenylyl cyclase. Here we used cryo-electron microscopy to elucidate the structure of an agonist-bound activated DRD2-G i complex reconstituted into a phospholipid membrane. The extracellular ligand-binding site of DRD2 is remodelled in response to agonist binding, with conformational changes in extracellular loop 2, transmembrane domain 5 (TM5), TM6 and TM7, propagating to opening of the intracellular G i -binding site. The DRD2-G i structure represents, to our knowledge, the first experimental model of a G-protein-coupled receptor-G-protein complex embedded in a phospholipid bilayer, which serves as a benchmark to validate the interactions seen in previous detergent-bound structures. The structure also reveals interactions that are unique to the membrane-embedded complex, including helix 8 burial in the inner leaflet, ordered lysine and arginine side chains in the membrane interfacial regions, and lipid anchoring of the G protein in the membrane. Our model of the activated DRD2 will help to inform the design of subtype-selective DRD2 ligands for multiple human central nervous system disorders.

    Organizational Affiliation: 

    Department of Biophysics, The University of Texas Southwestern Medical Center, Dallas, TX, USA. dan.rosenbaum@utsouthwestern.edu.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Guanine nucleotide-binding protein G(i) subunit alpha-1A354Rattus norvegicusMutation(s): 0 
Gene Names: Gnai1, Gnai-1
Membrane protein
Mpstruc		Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL		Sub Group: 
G Protein-Coupled Receptors: Class A		Protein: 
Dopamine D2 receptor-Gi protein complex in nanodiscs
Find proteins for P10824 (Rattus norvegicus)
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1B340Homo sapiensMutation(s): 0 
Gene Names: GNB1
Find proteins for P62873 (Homo sapiens)
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NIH Common Fund Data Resources
PHAROS:  P62873
GTEx:  ENSG00000078369
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2C82Homo sapiensMutation(s): 0 
Gene Names: GNG2
Membrane protein
Mpstruc		Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL		Sub Group: 
G Protein-Coupled Receptors: Class A		Protein: 
Dopamine D2 receptor-Gi protein complex in nanodiscs
Find proteins for P59768 (Homo sapiens)
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PHAROS:  P59768
GTEx:  ENSG00000186469
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  • Reference Sequence
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
scFv16D [auth E]259Homo sapiensMutation(s): 0 
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Entity ID: 5
MoleculeChainsSequence LengthOrganismDetailsImage
Endolysin,D(2) dopamine receptor,D(2) dopamine receptorE [auth R]450Escherichia virus T4, Homo sapiensMutation(s): 0 
Gene Names: e, T4Tp126, DRD2
EC: 3.2.1.17
Membrane protein
Mpstruc		Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL		Sub Group: 
G Protein-Coupled Receptors: Class A		Protein: 
Dopamine D2 receptor-Gi protein complex in nanodiscs
Find proteins for P14416 (Homo sapiens)
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PHAROS:  P14416
GTEx:  ENSG00000149295
Find proteins for D9IEF7 (Enterobacteria phage T4)
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
08Y
Query on 08Y
Download Ideal Coordinates CCD File 
 F [auth R]bromoergocryptine
C32 H40 Br N5 O5
OZVBMTJYIDMWIL-AYFBDAFISA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.80 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
Welch FoundationUnited StatesI-1770

Revision History  (Full details and data files)

  • Version 1.0: 2020-06-17
    Type: Initial release
  • Version 1.1: 2020-06-24
    Changes: Database references
  • Version 1.2: 2020-08-19
    Changes: Database references