4OZG

D2 protein complex

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Free: 0.241 
  • R-Value Work: 0.203 
  • R-Value Observed: 0.204 

wwPDB Validation   3D Report Full Report


This is version 2.0 of the entry. See complete history. 


Literature

T-cell receptor recognition of HLA-DQ2-gliadin complexes associated with celiac disease.

Petersen, J., Montserrat, V., Mujico, J.R., Loh, K.L., Beringer, D.X., van Lummel, M., Thompson, A., Mearin, M.L., Schweizer, J., Kooy-Winkelaar, Y., van Bergen, J., Drijfhout, J.W., Kan, W.T., La Gruta, N.L., Anderson, R.P., Reid, H.H., Koning, F., Rossjohn, J.

(2014) Nat Struct Mol Biol 21: 480-488

  • DOI: 10.1038/nsmb.2817
  • Primary Citation of Related Structures:  
    4OZG, 4OZH, 4OZI, 4OZF

  • PubMed Abstract: 

    • Celiac disease is a T cell-mediated disease induced by dietary gluten, a component of which is gliadin. 95% of individuals with celiac disease carry the HLA (human leukocyte antigen)-DQ2 locus. Here we determined the T-cell receptor (TCR) usage and fine specificity of patient-derived T-cell clones specific for two epitopes from wheat gliadin, DQ2 ...

    Celiac disease is a T cell-mediated disease induced by dietary gluten, a component of which is gliadin. 95% of individuals with celiac disease carry the HLA (human leukocyte antigen)-DQ2 locus. Here we determined the T-cell receptor (TCR) usage and fine specificity of patient-derived T-cell clones specific for two epitopes from wheat gliadin, DQ2.5-glia-α1a and DQ2.5-glia-α2. We determined the ternary structures of four distinct biased TCRs specific for those epitopes. All three TCRs specific for DQ2.5-glia-α2 docked centrally above HLA-DQ2, which together with mutagenesis and affinity measurements provided a basis for the biased TCR usage. A non-germline encoded arginine residue within the CDR3β loop acted as the lynchpin within this common docking footprint. Although the TCRs specific for DQ2.5-glia-α1a and DQ2.5-glia-α2 docked similarly, their interactions with the respective gliadin determinants differed markedly, thereby providing a basis for epitope specificity.

    Organizational Affiliation: 

    1] Department of Biochemistry and Molecular Biology, School of Biomedical Sciences, Monash University, Clayton, Victoria, Australia. [2] Institute of Infection and Immunity, Cardiff University School of Medicine, Heath Park, Cardiff, UK. [3] Australian Research Council Centre of Excellence in Advanced Molecular Imaging, Monash University, Clayton, Victoria, Australia. [4] [5].



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
HLA class II histocompatibility antigen, DQ alpha 1 chainA, C191Homo sapiensMutation(s): 0 
Gene Names: HLA-DQA1
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Find proteins for P01909 (Homo sapiens)
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PHAROS:  P01909
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
HLA class II histocompatibility antigen, DQ beta 1 chainB, D213Homo sapiensMutation(s): 0 
Gene Names: HLA-DQB1
UniProt
Find proteins for Q5Y7D3 (Homo sapiens)
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
T-cell receptor, d2, alpha chainE, G202Homo sapiensMutation(s): 0 
Gene Names: TRA@
UniProt
Find proteins for Q2YD82 (Homo sapiens)
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
T-cell receptor, d2, beta chainF, H242Homo sapiensMutation(s): 0 
Gene Names: TRBC1
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Entity ID: 5
MoleculeChainsSequence LengthOrganismDetailsImage
deamidated Gliadin-alpha2 peptideI, J13Triticum aestivumMutation(s): 0 
UniProt
Find proteins for P04722 (Triticum aestivum)
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  • Reference Sequence
Oligosaccharides

Help

Entity ID: 6
MoleculeChainsChain Length2D Diagram Glycosylation3D Interactions
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranoseK, L2 N-Glycosylation Oligosaccharides Interaction
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NAG
Query on NAG
Download Ideal Coordinates CCD File 
 M [auth C]2-acetamido-2-deoxy-beta-D-glucopyranose
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N		 Ligand Interaction
CA
Query on CA
Download Ideal Coordinates CCD File 
 N [auth C]CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Free: 0.241 
  • R-Value Work: 0.203 
  • R-Value Observed: 0.204 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 266.024α = 90
b = 60.266β = 114.04
c = 138.235γ = 90
Software Package:
Software NamePurpose
BUSTERrefinement

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2014-04-16
    Type: Initial release
  • Version 1.1: 2014-05-28
    Changes: Data collection
  • Version 1.2: 2014-12-24
    Changes: Database references
  • Version 1.3: 2015-02-04
    Changes: Derived calculations
  • Version 1.4: 2015-04-22
    Changes: Database references
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Atomic model, Data collection, Derived calculations, Other, Refinement description, Source and taxonomy, Structure summary