6LI3

cryo-EM structure of GPR52-miniGs-NB35


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.32 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structural basis of ligand recognition and self-activation of orphan GPR52.

Lin, X.Li, M.Wang, N.Wu, Y.Luo, Z.Guo, S.Han, G.W.Li, S.Yue, Y.Wei, X.Xie, X.Chen, Y.Zhao, S.Wu, J.Lei, M.Xu, F.

(2020) Nature 579: 152-157

  • DOI: https://doi.org/10.1038/s41586-020-2019-0
  • Primary Citation of Related Structures:  
    6LI0, 6LI1, 6LI2, 6LI3

  • PubMed Abstract: 

    GPR52 is a class-A orphan G-protein-coupled receptor that is highly expressed in the brain and represents a promising therapeutic target for the treatment of Huntington's disease and several psychiatric disorders 1,2 . Pathological malfunction of GPR52 signalling occurs primarily through the heterotrimeric G s protein 2 , but it is unclear how GPR52 and G s couple for signal transduction and whether a native ligand or other activating input is required. Here we present the high-resolution structures of human GPR52 in three states: a ligand-free state, a G s -coupled self-activation state and a potential allosteric ligand-bound state. Together, our structures reveal that extracellular loop 2 occupies the orthosteric binding pocket and operates as a built-in agonist, conferring an intrinsically high level of basal activity to GPR52 3 . A fully active state is achieved when G s is coupled to GPR52 in the absence of an external agonist. The receptor also features a side pocket for ligand binding. These insights into the structure and function of GPR52 could improve our understanding of other self-activated GPCRs, enable the identification of endogenous and tool ligands, and guide drug discovery efforts that target GPR52.


  • Organizational Affiliation

    iHuman Institute, ShanghaiTech University, Shanghai, China.


Macromolecules
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
G-protein coupled receptor 52A [auth R]340Homo sapiensMutation(s): 2 
Gene Names: GPR52
Membrane Entity: Yes 
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Go to UniProtKB:  Q9Y2T5
PHAROS:  Q9Y2T5
GTEx:  ENSG00000203737 
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UniProt GroupQ9Y2T5
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Guanine nucleotide-binding protein G(s) subunit alpha isoforms shortB [auth A]248Homo sapiensMutation(s): 6 
Gene Names: GNASGNAS1GSP
Membrane Entity: Yes 
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Find proteins for P63092 (Homo sapiens)
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PHAROS:  P63092
GTEx:  ENSG00000087460 
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1C [auth B]340Homo sapiensMutation(s): 0 
Gene Names: GNB1
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Find proteins for P62873 (Homo sapiens)
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PHAROS:  P62873
GTEx:  ENSG00000078369 
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UniProt GroupP62873
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Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2D [auth G]71Homo sapiensMutation(s): 1 
Gene Names: GNG2
Membrane Entity: Yes 
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Find proteins for P59768 (Homo sapiens)
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PHAROS:  P59768
GTEx:  ENSG00000186469 
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UniProt GroupP59768
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Entity ID: 5
MoleculeChains Sequence LengthOrganismDetailsImage
nanobody Nb35E [auth N]149Lama glamaMutation(s): 0 
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Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.32 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2020-02-26
    Type: Initial release
  • Version 1.1: 2020-03-04
    Changes: Database references
  • Version 1.2: 2020-03-18
    Changes: Database references