1E4K

CRYSTAL STRUCTURE OF SOLUBLE HUMAN IGG1 FC FRAGMENT-FC-GAMMA RECEPTOR III COMPLEX


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.20 Å
  • R-Value Free: 0.357 
  • R-Value Work: 0.271 
  • R-Value Observed: 0.271 

wwPDB Validation   3D Report Full Report


This is version 2.0 of the entry. See complete history


Literature

The 3.2A Crystal Structure of the Human Igg1 Fc Fragment-Fc-Gamma-Riii Complex

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

(2000) Nature 406: 267

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

  • 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)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
FC FRAGMENT OF HUMAN IGG1A, B225Homo sapiensMutation(s): 0 
Gene Names: IGHG1
UniProt & NIH Common Fund Data Resources
Find proteins for P01857 (Homo sapiens)
Explore P01857 
Go to UniProtKB:  P01857
PHAROS:  P01857
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
LOW AFFINITY IMMUNOGLOBULIN GAMMA FC RECEPTOR IIIC176Homo 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
Protein Feature View
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  • Reference Sequence
Oligosaccharides

Help

Entity ID: 3
MoleculeChainsChain Length2D DiagramGlycosylation3D Interactions
alpha-D-galactopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-2)-alpha-D-mannopyranose-(1-6)-[2-acetamido-2-deoxy-beta-D-glucopyranose-(1-2)-alpha-D-mannopyranose-(1-3)]beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-[alpha-L-fucopyranose-(1-6)]2-acetamido-2-deoxy-beta-D-glucopyranoseD9N-Glycosylation Oligosaccharides Interaction
Glycosylation Resources
GlyTouCan:  G71812IK
GlyCosmos:  G71812IK
GlyGen:  G71812IK
Entity ID: 4
MoleculeChainsChain Length2D DiagramGlycosylation3D Interactions
beta-D-galactopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-2)-alpha-D-mannopyranose-(1-6)-[2-acetamido-2-deoxy-beta-D-glucopyranose-(1-2)-alpha-D-mannopyranose-(1-3)]beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-[beta-L-fucopyranose-(1-6)]2-acetamido-2-deoxy-beta-D-glucopyranoseE9N-Glycosylation Oligosaccharides Interaction
Glycosylation Resources
GlyTouCan:  G33244HE
GlyCosmos:  G33244HE
GlyGen:  G33244HE
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.20 Å
  • R-Value Free: 0.357 
  • R-Value Work: 0.271 
  • R-Value Observed: 0.271 
  • Space Group: P 65 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 115.32α = 90
b = 115.32β = 90
c = 299.1γ = 120
Software Package:
Software NamePurpose
CNSrefinement
MOSFLMdata reduction
SCALAdata scaling
CNSphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2000-08-06
    Type: Initial release
  • Version 1.1: 2011-10-19
    Changes: Data collection, Derived calculations, Non-polymer description, Other, Refinement description, Structure summary, Version format compliance
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Atomic model, Data collection, Derived calculations, Structure summary