1E4J

Crystal structure of the soluble human Fc-gamma Receptor III


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.261 
  • R-Value Work: 0.195 
  • R-Value Observed: 0.195 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

The 3.2-A Crystal Structure of the Human Igg1 Fc Fragment-Fc Gammariii Complex.

Sondermann, P.Huber, R.Oosthuizen, V.Jacob, U.

(2000) Nature 406: 267

  • DOI: 10.1038/35018508
  • Primary Citation of Related Structures:  
    1E4J, 1E4K

  • PubMed Abstract: 
  • The immune response depends on the binding of opsonized antigens to cellular Fc receptors and the subsequent initiation of various cellular effector functions of the immune system. Here we describe the crystal structures of a soluble Fc gamma receptor (sFc gammaRIII, CD16), an Fc fragment from human IgG1 (hFc1) and their complex ...

    The immune response depends on the binding of opsonized antigens to cellular Fc receptors and the subsequent initiation of various cellular effector functions of the immune system. Here we describe the crystal structures of a soluble Fc gamma receptor (sFc gammaRIII, CD16), an Fc fragment from human IgG1 (hFc1) and their complex. In the 1:1 complex the receptor binds to the two halves of the Fc fragment in contact with residues of the C gamma2 domains and the hinge region. Upon complex formation the angle between the two sFc gammaRIII domains increases significantly and the Fc fragment opens asymmetrically. The high degree of amino acid conservation between sFc gammaRIII and other Fc receptors, and similarly between hFc1 and related immunoglobulins, suggest similar structures and modes of association. Thus the described structure is a model for immune complex recognition and helps to explain the vastly differing affinities of other Fc gammaR-IgG complexes and the Fc epsilonRI alpha-IgE complex.


    Organizational Affiliation

    Max-Planck-Institut für Biochemie, Martinsried, Germany. sonderma@biochem.mpg.de



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
LOW AFFINITY IMMUNOGLOBULIN GAMMA FC RECEPTOR IIIA176Homo sapiensMutation(s): 0 
Gene Names: FCGR3BCD16BFCG3FCGR3IGFR3
UniProt & NIH Common Fund Data Resources
Find proteins for O75015 (Homo sapiens)
Explore O75015 
Go to UniProtKB:  O75015
PHAROS:  O75015
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO75015
Protein Feature View
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.261 
  • R-Value Work: 0.195 
  • R-Value Observed: 0.195 
  • Space Group: P 2 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 36.7α = 90
b = 60.29β = 90
c = 85.58γ = 90
Software Package:
Software NamePurpose
CNSrefinement
MOSFLMdata reduction
SCALAdata scaling
AMoREphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2000-08-04
    Type: Initial release
  • Version 1.1: 2011-06-02
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance