8HK2

C3aR-Gi-C3a protein complex


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.90 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Revealing the signaling of complement receptors C3aR and C5aR1 by anaphylatoxins.

Wang, Y.Liu, W.Xu, Y.He, X.Yuan, Q.Luo, P.Fan, W.Zhu, J.Zhang, X.Cheng, X.Jiang, Y.Xu, H.E.Zhuang, Y.

(2023) Nat Chem Biol 19: 1351-1360

  • DOI: https://doi.org/10.1038/s41589-023-01339-w
  • Primary Citation of Related Structures:  
    8HK2, 8HK3, 8HK5

  • PubMed Abstract: 

    The complement receptors C3aR and C5aR1, whose signaling is selectively activated by anaphylatoxins C3a and C5a, are important regulators of both innate and adaptive immune responses. Dysregulations of C3aR and C5aR1 signaling lead to multiple inflammatory disorders, including sepsis, asthma and acute respiratory distress syndrome. The mechanism underlying endogenous anaphylatoxin recognition and activation of C3aR and C5aR1 remains elusive. Here we reported the structures of C3a-bound C3aR and C5a-bound C5aR1 as well as an apo-C3aR structure. These structures, combined with mutagenesis analysis, reveal a conserved recognition pattern of anaphylatoxins to the complement receptors that is different from chemokine receptors, unique pocket topologies of C3aR and C5aR1 that mediate ligand selectivity, and a common mechanism of receptor activation. These results provide crucial insights into the molecular understanding of C3aR and C5aR1 signaling and structural templates for rational drug design for treating inflammation disorders.


  • Organizational Affiliation

    State Key Laboratory of Drug Research, Center for Structure and Function of Drug Targets, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China.


Macromolecules
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
C3a anaphylatoxin chemotactic receptor476Homo sapiensMutation(s): 0 
Gene Names: C3AR1AZ3BC3R1HNFAG09
Membrane Entity: Yes 
UniProt & NIH Common Fund Data Resources
Find proteins for Q16581 (Homo sapiens)
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Go to UniProtKB:  Q16581
PHAROS:  Q16581
GTEx:  ENSG00000171860 
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UniProt GroupQ16581
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  • Reference Sequence
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Guanine nucleotide-binding protein G(i) subunit alpha-1353Homo sapiensMutation(s): 0 
Gene Names: GNAI1
EC: 3.6.5
Membrane Entity: Yes 
UniProt & NIH Common Fund Data Resources
Find proteins for P63096 (Homo sapiens)
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PHAROS:  P63096
GTEx:  ENSG00000127955 
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UniProt GroupP63096
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1345Rattus norvegicusMutation(s): 0 
Gene Names: Gnb1
UniProt
Find proteins for P54311 (Rattus norvegicus)
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UniProt GroupP54311
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  • Reference Sequence
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Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
C3a anaphylatoxin77Homo sapiensMutation(s): 0 
Gene Names: C3CPAMD1
Membrane Entity: Yes 
UniProt & NIH Common Fund Data Resources
Find proteins for P01024 (Homo sapiens)
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PHAROS:  P01024
GTEx:  ENSG00000125730 
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UniProt GroupP01024
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Entity ID: 5
MoleculeChains Sequence LengthOrganismDetailsImage
Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2E [auth G]67Bos taurusMutation(s): 0 
Gene Names: GNG2
Membrane Entity: Yes 
UniProt
Find proteins for P63212 (Bos taurus)
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UniProt GroupP63212
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Entity ID: 6
MoleculeChains Sequence LengthOrganismDetailsImage
scFV16F [auth H]247Rattus norvegicusMutation(s): 0 
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.90 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Natural Science Foundation of China (NSFC)China81902085

Revision History  (Full details and data files)

  • Version 1.0: 2023-05-10
    Type: Initial release
  • Version 1.1: 2023-05-24
    Changes: Database references
  • Version 1.2: 2023-11-08
    Changes: Data collection, Database references
  • Version 1.3: 2024-10-16
    Changes: Data collection, Structure summary