2NNA

Structure of the MHC class II molecule HLA-DQ8 bound with a deamidated gluten peptide


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.217 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

A structural and immunological basis for the role of human leukocyte antigen DQ8 in celiac disease

Henderson, K.N.Tye-Din, J.A.Reid, H.H.Chen, Z.Borg, N.A.Beissbarth, T.Tatham, A.Mannering, S.I.Purcell, A.W.Dudek, N.L.van Heel, D.A.McCluskey, J.Rossjohn, J.Anderson, R.P.

(2007) Immunity 27: 23-34

  • DOI: 10.1016/j.immuni.2007.05.015

  • PubMed Abstract: 
  • The risk of celiac disease is strongly associated with human leukocyte antigen (HLA) DQ2 and to a lesser extent with HLA DQ8. Although the pathogenesis of HLA-DQ2-mediated celiac disease is established, the underlying basis for HLA-DQ8-mediated celia ...

    The risk of celiac disease is strongly associated with human leukocyte antigen (HLA) DQ2 and to a lesser extent with HLA DQ8. Although the pathogenesis of HLA-DQ2-mediated celiac disease is established, the underlying basis for HLA-DQ8-mediated celiac disease remains unclear. We showed that T helper 1 (Th1) responses in HLA-DQ8-associated celiac pathology were indeed HLA DQ8 restricted and that multiple, mostly deamidated peptides derived from protease-sensitive sites of gliadin were recognized. This pattern of reactivity contrasted with the more absolute deamidation dependence and relative protease resistance of the dominant gliadin peptide in DQ2-mediated disease. We provided a structural basis for the selection of HLA-DQ8-restricted, deamidated gliadin peptides. The data established that the molecular mechanisms underlying HLA-DQ8-mediated celiac disease differed markedly from the HLA-DQ2-mediated form of the disease. Accordingly, nondietary therapeutic interventions in celiac disease might need to be tailored to the genotype of the individual.


    Organizational Affiliation

    The Protein Crystallography Unit, Department of Biochemistry and Molecular Biology, School of Biomedical Sciences, Monash University, Clayton, Victoria 3800, Australia.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
MHC class II antigen
A
184Homo sapiensGene Names: HLA-DQA1
Find proteins for P01909 (Homo sapiens)
Go to Gene View: HLA-DQA1
Go to UniProtKB:  P01909
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
MHC class II antigen
B
207Homo sapiensGene Names: HLA-DQB1 (HLA-DQB)
Find proteins for P01920 (Homo sapiens)
Go to Gene View: HLA-DQB1
Go to UniProtKB:  P01920
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
gluten peptide
C
18Triticum aestivumN/A
Find proteins for P18573 (Triticum aestivum)
Go to UniProtKB:  P18573
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.217 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 58.830α = 90.00
b = 92.520β = 90.00
c = 113.060γ = 90.00
Software Package:
Software NamePurpose
d*TREKdata reduction
CrystalCleardata collection
CNSrefinement
AMoREphasing
d*TREKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2007-09-04
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Derived calculations, Version format compliance