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: 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 ...

    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

    Centre for Excellence in Molecular Cell Science, Chinese Academy of Sciences, Shanghai, China. xufei@shanghaitech.edu.cn.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
G-protein coupled receptor 52A [auth R]340Homo sapiensMutation(s): 2 
Gene Names: GPR52
Membrane Entity: Yes 
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Find proteins for Q9Y2T5 (Homo sapiens)
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PHAROS:  Q9Y2T5
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Entity ID: 2
MoleculeChainsSequence 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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Entity ID: 3
MoleculeChainsSequence 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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Entity ID: 4
MoleculeChainsSequence 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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Entity ID: 5
MoleculeChainsSequence 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