2WQR

The high resolution crystal structure of IgE Fc


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.234 
  • R-Value Work: 0.193 
  • R-Value Observed: 0.195 

wwPDB Validation 3D Report Full Report



Literature

Conformational Changes in Ige Contribute to its Uniquely Slow Dissociation Rate from Receptor Fceri

Holdom, M.D.Davies, A.M.Nettleship, J.E.Bagby, S.C.Dhaliwal, B.Girardi, E.Hunt, J.Gould, H.J.Beavil, A.J.Mcdonnell, J.M.Owens, R.J.Sutton, B.J.

(2011) Nat Struct Mol Biol 18: 571

  • DOI: 10.1038/nsmb.2044
  • Primary Citation of Related Structures:  
    2WQR, 2Y7Q

  • PubMed Abstract: 
  • Among antibody classes, IgE has a uniquely slow dissociation rate from, and high affinity for, its cell surface receptor FcɛRI. We show the structural basis for these key determinants of the ability of IgE to mediate allergic hypersensitivity through ...

    Among antibody classes, IgE has a uniquely slow dissociation rate from, and high affinity for, its cell surface receptor FcɛRI. We show the structural basis for these key determinants of the ability of IgE to mediate allergic hypersensitivity through the 3.4-Å-resolution crystal structure of human IgE-Fc (consisting of the Cɛ2, Cɛ3 and Cɛ4 domains) bound to the extracellular domains of the FcɛRI α chain. Comparison with the structure of free IgE-Fc (reported here at a resolution of 1.9 Å) shows that the antibody, which has a compact, bent structure before receptor engagement, becomes even more acutely bent in the complex. Thermodynamic analysis indicates that the interaction is entropically driven, which explains how the noncontacting Cɛ2 domains, in place of the flexible hinge region of IgG antibodies, contribute together with the conformational changes to the unique binding properties of IgE.


    Related Citations: 
    • The Crystal Structure of Ige Fc Reveals an Asymmetrically Bent Conformation
      Wan, T., Beavil, R.L., Fabiane, S.M., Beavil, A.J., Sohi, M.K., Keown, M., Young, R.J., Henry, A.J., Owens, R.J., Gould, H.J., Sutton, B.J.
      (2002) Nat Immunol 3: 681

    Organizational Affiliation

    King's College London, Randall Division of Cell and Molecular Biophysics, London, UK.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
IG EPSILON CHAIN C REGIONAB323Homo sapiensMutation(s): 2 
Gene Names: IGHE
Find proteins for P01854 (Homo sapiens)
Explore P01854 
Go to UniProtKB:  P01854
NIH Common Fund Data Resources
PHAROS  P01854
Protein Feature View
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  • Reference Sequence
Oligosaccharides

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Entity ID: 2
MoleculeChainsChain Length2D Diagram Glycosylation
alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose-(1-6)]beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose
C, D
5 N-Glycosylation
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PG4
Query on PG4

Download CCD File 
B
TETRAETHYLENE GLYCOL
C8 H18 O5
UWHCKJMYHZGTIT-UHFFFAOYSA-N
 Ligand Interaction
TRS
Query on TRS

Download CCD File 
A
2-AMINO-2-HYDROXYMETHYL-PROPANE-1,3-DIOL
C4 H12 N O3
LENZDBCJOHFCAS-UHFFFAOYSA-O
 Ligand Interaction
SO4
Query on SO4

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A, B
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
GOL
Query on GOL

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A, B
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.234 
  • R-Value Work: 0.193 
  • R-Value Observed: 0.195 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 130.502α = 90
b = 75.282β = 90
c = 79.144γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling
MOLREPphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-11-03
    Type: Initial release
  • Version 1.1: 2011-05-12
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2017-07-12
    Changes: Derived calculations
  • Version 1.4: 2019-05-08
    Changes: Data collection, Experimental preparation
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Atomic model, Data collection, Derived calculations, Other, Structure summary