8IA7

Structural insights into human brain gut peptide cholecystokinin receptors


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.10 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Structural insights into human brain-gut peptide cholecystokinin receptors.

Ding, Y.Zhang, H.Liao, Y.Y.Chen, L.N.Ji, S.Y.Qin, J.Mao, C.Shen, D.D.Lin, L.Wang, H.Zhang, Y.Li, X.M.

(2022) Cell Discov 8: 55-55

  • DOI: https://doi.org/10.1038/s41421-022-00420-3
  • Primary Citation of Related Structures:  
    7XOU, 7XOV, 7XOW, 8IA7

  • PubMed Abstract: 

    The intestinal hormone and neuromodulator cholecystokinin (CCK) receptors CCK1R and CCK2R act as a signaling hub in brain-gut axis, mediating digestion, emotion, and memory regulation. CCK receptors exhibit distinct preferences for ligands in different posttranslational modification (PTM) states. CCK1R couples to G s and G q , whereas CCK2R primarily couples to G q . Here we report the cryo-electron microscopy (cryo-EM) structures of CCK1R-G s signaling complexes liganded either by sulfated cholecystokinin octapeptide (CCK-8) or a CCK1R-selective small-molecule SR146131, and CCK2R-G q complexes stabilized by either sulfated CCK-8 or a CCK2R-selective ligand gastrin-17. Our structures reveal a location-conserved yet charge-distinct pocket discriminating the effects of ligand PTM states on receptor subtype preference, the unique pocket topology underlying selectivity of SR146131 and gastrin-17, the conformational changes in receptor activation, and key residues contributing to G protein subtype specificity, providing multiple structural templates for drug design targeting the brain-gut axis.


  • Organizational Affiliation

    Department of Neurobiology and Department of Neurology of Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China.


Macromolecules
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Gastrin/cholecystokinin type B receptorA [auth R]447Homo sapiensMutation(s): 0 
Gene Names: CCKBRCCKRB
Membrane Entity: Yes 
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Find proteins for P32239 (Homo sapiens)
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PHAROS:  P32239
GTEx:  ENSG00000110148 
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UniProt GroupP32239
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1345Homo 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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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-270Homo sapiensMutation(s): 0 
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: 4
MoleculeChains Sequence LengthOrganismDetailsImage
scfv16D [auth E]269Mus musculusMutation(s): 0 
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Entity ID: 5
MoleculeChains Sequence LengthOrganismDetailsImage
Guanine nucleotide-binding protein G(q) subunit alphaE [auth A]353Homo sapiensMutation(s): 0 
Gene Names: GNAQGAQ
EC: 3.6.5
Membrane Entity: Yes 
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GTEx:  ENSG00000156052 
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  • Reference Sequence

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Entity ID: 6
MoleculeChains Sequence LengthOrganismDetailsImage
CCK-8F [auth L]9Homo sapiensMutation(s): 0 
Membrane Entity: Yes 
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Find proteins for P06307 (Homo sapiens)
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PHAROS:  P06307
GTEx:  ENSG00000187094 
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UniProt GroupP06307
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Small Molecules
Modified Residues  1 Unique
IDChains TypeFormula2D DiagramParent
TYS
Query on TYS
F [auth L]L-PEPTIDE LINKINGC9 H11 N O6 STYR
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.10 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Natural Science Foundation of China (NSFC)China--

Revision History  (Full details and data files)

  • Version 1.0: 2023-12-06
    Type: Initial release
  • Version 1.1: 2024-11-13
    Changes: Data collection, Structure summary