3RY5

Three-dimensional structure of glycosylated fcgammariia (high-responder polymorphism)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.275 
  • R-Value Work: 0.206 
  • R-Value Observed: 0.206 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Structural Basis for Fc{gamma}RIIa Recognition of Human IgG and Formation of Inflammatory Signaling Complexes.

Ramsland, P.A.Farrugia, W.Bradford, T.M.Sardjono, C.T.Esparon, S.Trist, H.M.Powell, M.S.Tan, P.S.Cendron, A.C.Wines, B.D.Scott, A.M.Hogarth, P.M.

(2011) J Immunol 187: 3208-3217

  • DOI: https://doi.org/10.4049/jimmunol.1101467
  • Primary Citation of Related Structures:  
    3RY4, 3RY5, 3RY6

  • PubMed Abstract: 

    The interaction of Abs with their specific FcRs is of primary importance in host immune effector systems involved in infection and inflammation, and are the target for immune evasion by pathogens. FcγRIIa is a unique and the most widespread activating FcR in humans that through avid binding of immune complexes potently triggers inflammation. Polymorphisms of FcγRIIa (high responder/low responder [HR/LR]) are linked to susceptibility to infections, autoimmune diseases, and the efficacy of therapeutic Abs. In this article, we define the three-dimensional structure of the complex between the HR (arginine, R134) allele of FcγRIIa (FcγRIIa-HR) and the Fc region of a humanized IgG1 Ab, hu3S193. The structure suggests how the HR/LR polymorphism may influence FcγRIIa interactions with different IgG subclasses and glycoforms. In addition, mutagenesis defined the basis of the epitopes detected by FcR blocking mAbs specific for FcγRIIa (IV.3), FcγRIIb (X63-21), and a pan FcγRII Ab (8.7). The epitopes detected by these Abs are distinct, but all overlap with residues defined by crystallography to contact IgG. Finally, crystal structures of LR (histidine, H134) allele of FcγRIIa and FcγRIIa-HR reveal two distinct receptor dimers that may represent quaternary states on the cell surface. A model is presented whereby a dimer of FcγRIIa-HR binds Ag-Ab complexes in an arrangement that possibly occurs on the cell membrane as part of a larger signaling assembly.


  • Organizational Affiliation

    Centre for Immunology, Burnet Institute, Melbourne, Victoria 3004, Australia.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
LOW AFFINITY IMMUNOGLOBULIN GAMMA FC REGION RECEPTOR II-A170Homo sapiensMutation(s): 1 
Gene Names: FCGR2ACD32FCG2FCGR2A1IGFR2
UniProt & NIH Common Fund Data Resources
Find proteins for P12318 (Homo sapiens)
Explore P12318 
Go to UniProtKB:  P12318
PHAROS:  P12318
GTEx:  ENSG00000143226 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP12318
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.275 
  • R-Value Work: 0.206 
  • R-Value Observed: 0.206 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 50.036α = 90
b = 77.935β = 90
c = 88.104γ = 90
Software Package:
Software NamePurpose
CNSrefinement
DENZOdata reduction
SCALEPACKdata scaling
CNSphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2011-08-31
    Type: Initial release
  • Version 1.1: 2011-09-21
    Changes: Database references