1E4J

Crystal structure of the soluble human Fc-gamma Receptor III


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.261 
  • R-Value Work: 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:  

  • 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 recepto ...

    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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
LOW AFFINITY IMMUNOGLOBULIN GAMMA FC RECEPTOR III
A
176Homo sapiensMutation(s): 0 
Gene Names: FCGR3B (CD16B, FCG3, FCGR3, IGFR3)
Find proteins for O75015 (Homo sapiens)
Go to Gene View: FCGR3B
Go to UniProtKB:  O75015
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.261 
  • R-Value Work: 0.195 
  • Space Group: P 2 21 21
Unit Cell:
Length (Å)Angle (°)
a = 36.700α = 90.00
b = 60.290β = 90.00
c = 85.580γ = 90.00
Software Package:
Software NamePurpose
SCALAdata scaling
AMoREphasing
CNSrefinement
MOSFLMdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

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