2Y7Q

THE HIGH-AFFINITY COMPLEX BETWEEN IGE AND ITS RECEPTOR FC EPSILON RI


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.4 Å
  • R-Value Free: 0.292 
  • R-Value Work: 0.245 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

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:  

  • 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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
HIGH AFFINITY IMMUNOGLOBULIN EPSILON RECEPTOR SUBUNIT ALPHA
A
188Homo sapiensMutation(s): 3 
Gene Names: FCER1A (FCE1A)
Find proteins for P12319 (Homo sapiens)
Go to Gene View: FCER1A
Go to UniProtKB:  P12319
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
IG EPSILON CHAIN C REGION
B, D
327Homo sapiensMutation(s): 3 
Gene Names: IGHE
Find proteins for P01854 (Homo sapiens)
Go to UniProtKB:  P01854
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MAN
Query on MAN

Download SDF File 
Download CCD File 
A
ALPHA-D-MANNOSE
C6 H12 O6
WQZGKKKJIJFFOK-PQMKYFCFSA-N
 Ligand Interaction
BMA
Query on BMA

Download SDF File 
Download CCD File 
A
BETA-D-MANNOSE
C6 H12 O6
WQZGKKKJIJFFOK-RWOPYEJCSA-N
 Ligand Interaction
NAG
Query on NAG

Download SDF File 
Download CCD File 
A, B, D
N-ACETYL-D-GLUCOSAMINE
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.4 Å
  • R-Value Free: 0.292 
  • R-Value Work: 0.245 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 99.491α = 90.00
b = 103.341β = 90.00
c = 110.122γ = 90.00
Software Package:
Software NamePurpose
SCALAdata scaling
MOLREPphasing
PHENIXrefinement
MOSFLMdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-04-20
    Type: Initial release
  • Version 1.1: 2011-05-12
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance