8XQJ

Cryo-EM structure of human dimeric APJR complex with antagonistic antibody


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.95 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

Structural insights into the regulation of monomeric and dimeric apelin receptor.

Yue, Y.Liu, L.Wu, L.Xu, C.Na, M.Liu, S.Liu, Y.Li, F.Liu, J.Shi, S.Lei, H.Zhao, M.Yang, T.Ji, W.Wang, A.Hanson, M.A.Stevens, R.C.Liu, J.Xu, F.

(2025) Nat Commun 16: 310-310

  • DOI: https://doi.org/10.1038/s41467-024-55555-6
  • Primary Citation of Related Structures:  
    8XQE, 8XQF, 8XQI, 8XQJ, 8Z74, 8Z7J

  • PubMed Abstract: 

    The apelin receptor (APJR) emerges as a promising drug target for cardiovascular health and muscle regeneration. While prior research unveiled the structural versatility of APJR in coupling to Gi proteins as a monomer or dimer, the dynamic regulation within the APJR dimer during activation remains poorly understood. In this study, we present the structures of the APJR dimer and monomer complexed with its endogenous ligand apelin-13. In the dimeric structure, apelin-13 binds exclusively to one protomer that is coupled with Gi proteins, revealing a distinct ligand-binding behavior within APJR homodimers. Furthermore, binding of an antagonistic antibody induces a more compact dimerization by engaging both protomers. Notably, structural analyses of the APJR dimer complexed with an agonistic antibody, with or without Gi proteins, suggest that G protein coupling may promote the dissociation of the APJR dimer during activation. These findings underscore the intricate interplay between ligands, dimerization, and G protein coupling in regulating APJR signaling pathways.


  • Organizational Affiliation

    iHuman Institute, ShanghaiTech University, Shanghai, China.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
JN241
A, B
167Homo sapiensMutation(s): 0 
Entity Groups  
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Sequence Annotations
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Soluble cytochrome b562,Apelin receptor
C, D
477Homo sapiensMutation(s): 0 
Gene Names: cybCAPLNRAGTRL1APJ
Membrane Entity: Yes 
UniProt & NIH Common Fund Data Resources
Find proteins for P0ABE7 (Escherichia coli)
Explore P0ABE7 
Go to UniProtKB:  P0ABE7
Find proteins for P35414 (Homo sapiens)
Explore P35414 
Go to UniProtKB:  P35414
PHAROS:  P35414
GTEx:  ENSG00000134817 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupsP0ABE7P35414
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.95 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Not funded--

Revision History  (Full details and data files)

  • Version 1.0: 2025-01-22
    Type: Initial release