4GG8

Immune Receptor


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.20 Å
  • R-Value Free: 0.308 
  • R-Value Work: 0.261 
  • R-Value Observed: 0.265 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 2.2 of the entry. See complete history


Literature

Biased T cell receptor usage directed against human leukocyte antigen DQ8-restricted gliadin peptides is associated with celiac disease.

Broughton, S.E.Petersen, J.Theodossis, A.Scally, S.W.Loh, K.L.Thompson, A.van Bergen, J.Kooy-Winkelaar, Y.Henderson, K.N.Beddoe, T.Tye-Din, J.A.Mannering, S.I.Purcell, A.W.McCluskey, J.Anderson, R.P.Koning, F.Reid, H.H.Rossjohn, J.

(2012) Immunity 37: 611-621

  • DOI: https://doi.org/10.1016/j.immuni.2012.07.013
  • Primary Citation of Related Structures:  
    4GG6, 4GG8

  • PubMed Abstract: 

    Celiac disease is a human leukocyte antigen (HLA)-DQ2- and/or DQ8-associated T cell-mediated disorder that is induced by dietary gluten. Although it is established how gluten peptides bind HLA-DQ8 and HLA-DQ2, it is unclear how such peptide-HLA complexes are engaged by the T cell receptor (TCR), a recognition event that triggers disease pathology. We show that biased TCR usage (TRBV9(∗)01) underpins the recognition of HLA-DQ8-α-I-gliadin. The structure of a prototypical TRBV9(∗)01-TCR-HLA-DQ8-α-I-gliadin complex shows that the TCR docks centrally above HLA-DQ8-α-I-gliadin, in which all complementarity-determining region-β (CDRβ) loops interact with the gliadin peptide. Mutagenesis at the TRBV9(∗)01-TCR-HLA-DQ8-α-I-gliadin interface provides an energetic basis for the Vβ bias. Moreover, CDR3 diversity accounts for TRBV9(∗)01(+) TCRs exhibiting differing reactivities toward the gliadin epitopes at various deamidation states. Accordingly, biased TCR usage is an important factor in the pathogenesis of DQ8-mediated celiac disease.


  • Organizational Affiliation

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


Macromolecules
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
T-CELL RECEPTOR, SP3.4 ALPHA CHAINA [auth E],
D [auth A]
207Homo sapiensMutation(s): 0 
UniProt
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Go to UniProtKB:  K7N5N2
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UniProt GroupK7N5N2
Sequence Annotations
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  • Reference Sequence
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
T-CELL RECEPTOR, SP3.4 BETA CHAINB [auth F],
C [auth B]
245Homo sapiensMutation(s): 0 
UniProt
Find proteins for P01850 (Homo sapiens)
Explore P01850 
Go to UniProtKB:  P01850
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UniProt GroupP01850
Sequence Annotations
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  • Reference Sequence
Oligosaccharides

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Entity ID: 3
MoleculeChains Length2D Diagram Glycosylation3D Interactions
beta-D-fructofuranose-(2-1)-alpha-D-glucopyranoseE [auth C],
F [auth D]
2N/A
Glycosylation Resources
GlyTouCan:  G05551OP
GlyCosmos:  G05551OP
Biologically Interesting Molecules (External Reference) 1 Unique
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.20 Å
  • R-Value Free: 0.308 
  • R-Value Work: 0.261 
  • R-Value Observed: 0.265 
  • Space Group: P 3
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 124.562α = 90
b = 124.562β = 90
c = 61.098γ = 120
Software Package:
Software NamePurpose
Blu-Icedata collection
PHASERphasing
REFMACrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2012-10-24
    Type: Initial release
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Atomic model, Data collection, Derived calculations, Non-polymer description, Structure summary
  • Version 2.1: 2022-08-24
    Changes: Database references, Structure summary
  • Version 2.2: 2023-11-08
    Changes: Data collection, Refinement description