2NNA

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.217 

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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
  • Primary Citation of Related Structures:  
    2NNA

  • 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
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
MHC class II antigenA184Homo sapiensMutation(s): 0 
Gene Names: HLA-DQA1
Find proteins for P01909 (Homo sapiens)
Explore P01909 
Go to UniProtKB:  P01909
NIH Common Fund Data Resources
PHAROS  P01909
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
MHC class II antigenB207Homo sapiensMutation(s): 0 
Gene Names: HLA-DQB1HLA-DQB
Find proteins for P01920 (Homo sapiens)
Explore P01920 
Go to UniProtKB:  P01920
NIH Common Fund Data Resources
PHAROS  P01920
Protein Feature View
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  • Reference Sequence
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
gluten peptideC18N/AMutation(s): 0 
Find proteins for P18573 (Triticum aestivum)
Explore P18573 
Go to UniProtKB:  P18573
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.217 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 58.83α = 90
b = 92.52β = 90
c = 113.06γ = 90
Software Package:
Software NamePurpose
CrystalCleardata collection
AMoREphasing
CNSrefinement
d*TREKdata reduction
d*TREKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History 

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