1OVZ

Crystal structure of human FcaRI


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Free: 0.292 
  • R-Value Work: 0.235 
  • R-Value Observed: 0.235 

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Ligand Structure Quality Assessment 


This is version 2.0 of the entry. See complete history


Literature

Insights into IgA-mediated immune responses from the crystal structures of human Fc-alpha-RI and its complex with IgA1-Fc

Herr, A.B.Ballister, E.R.Bjorkman, P.J.

(2003) Nature 423: 614-620

  • DOI: 10.1038/nature01685
  • Primary Citation of Related Structures:  
    1OVZ, 1OW0

  • PubMed Abstract: 
  • Immunoglobulin-alpha (IgA)-bound antigens induce immune effector responses by activating the IgA-specific receptor FcalphaRI (CD89) on immune cells. Here we present crystal structures of human FcalphaRI alone and in a complex with the Fc region of IgA1 (Fcalpha) ...

    Immunoglobulin-alpha (IgA)-bound antigens induce immune effector responses by activating the IgA-specific receptor FcalphaRI (CD89) on immune cells. Here we present crystal structures of human FcalphaRI alone and in a complex with the Fc region of IgA1 (Fcalpha). FcalphaRI has two immunoglobulin-like domains that are oriented at approximately right angles to each other. Fcalpha resembles the Fcs of immunoglobulins IgG and IgE, but has differently located interchain disulphide bonds and external rather than interdomain N-linked carbohydrates. Unlike 1:1 FcgammaRIII:IgG and Fc epsilon RI:IgE complexes, two FcalphaRI molecules bind each Fcalpha dimer, one at each Calpha2-Calpha3 junction. The FcalphaRI-binding site on IgA1 overlaps the reported polymeric immunoglobulin receptor (pIgR)-binding site, which might explain why secretory IgA cannot initiate phagocytosis or bind to FcalphaRI-expressing cells in the absence of an integrin co-receptor.


    Related Citations: 
    • Bivalent Binding of IgA1 to FcaRI Suggests a Mechanism for Cytokine Activation of IgA Phagocytosis
      Herr, A.B., White, C.L., Milburn, C., Wu, C., Bjorkman, P.J.
      (2003) J Mol Biol 327: 645

    Organizational Affiliation

    Division of Biology 114-96, California Institute of Technology, Pasadena, California 91125, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Immunoglobulin alpha Fc receptorA, B207Homo sapiensMutation(s): 0 
Gene Names: FCAR OR CD89FCARCD89
UniProt & NIH Common Fund Data Resources
Find proteins for P24071 (Homo sapiens)
Explore P24071 
Go to UniProtKB:  P24071
PHAROS:  P24071
GTEx:  ENSG00000186431 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP24071
Protein Feature View
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  • Reference Sequence
Oligosaccharides

Help

Entity ID: 2
MoleculeChainsChain Length2D DiagramGlycosylation3D Interactions
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranoseC 2N-Glycosylation Oligosaccharides Interaction
Glycosylation Resources
GlyTouCan:  G42666HT
GlyCosmos:  G42666HT
GlyGen:  G42666HT
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NAG
Query on NAG

Download Ideal Coordinates CCD File 
D [auth A],
F [auth B],
G [auth B]
2-acetamido-2-deoxy-beta-D-glucopyranose
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
TRS
Query on TRS

Download Ideal Coordinates CCD File 
E [auth A]2-AMINO-2-HYDROXYMETHYL-PROPANE-1,3-DIOL
C4 H12 N O3
LENZDBCJOHFCAS-UHFFFAOYSA-O
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Free: 0.292 
  • R-Value Work: 0.235 
  • R-Value Observed: 0.235 
  • Space Group: I 41
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 158.15α = 90
b = 158.15β = 90
c = 39.91γ = 90
Software Package:
Software NamePurpose
CNSrefinement
DENZOdata reduction
SCALEPACKdata scaling
SHARPphasing

Structure Validation

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Ligand Structure Quality Assessment 



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2003-05-27
    Type: Initial release
  • Version 1.1: 2008-04-29
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Non-polymer description, Version format compliance
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Advisory, Atomic model, Data collection, Database references, Derived calculations, Non-polymer description, Structure summary