2XN9

Crystal structure of the ternary complex between human T cell receptor, staphylococcal enterotoxin H and human major histocompatibility complex class II


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.272 
  • R-Value Work: 0.222 
  • R-Value Observed: 0.224 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

The Structure of Superantigen Complexed with Tcr and Mhc Reveals Novel Insights Into Superantigenic T Cell Activation.

Saline, M.Rodstrom, K.E.J.Fischer, G.Orekhov, V.Y.Karlsson, B.G.Lindkvist-Petersson, K.

(2010) Nat Commun 1: 119

  • DOI: 10.1038/ncomms1117
  • Primary Citation of Related Structures:  
    2XN9, 2XNA

  • PubMed Abstract: 
  • Superantigens (SAgs) are bacterial toxins that interact with immunoreceptors, T cell receptor (TCR) and major histocompatibility complex (MHC) class II, conventionally through the variable β-domain of TCR (TCRVβ). They induce a massive release of cytokines, which can lead to diseases such as food poisoning and toxic shock syndrome ...

    Superantigens (SAgs) are bacterial toxins that interact with immunoreceptors, T cell receptor (TCR) and major histocompatibility complex (MHC) class II, conventionally through the variable β-domain of TCR (TCRVβ). They induce a massive release of cytokines, which can lead to diseases such as food poisoning and toxic shock syndrome. In this study, we report the X-ray structure of the ternary complex between staphylococcal enterotoxin H (SEH) and its human receptors, MHC class II and TCR. The structure demonstrates that SEH predominantly interacts with the variable α-domain of TCR (TCRVα), which is supported by nuclear magnetic resonance (NMR) analyses. Furthermore, there is no contact between MHC and TCR upon complex formation. Structural analyses suggest that the major contact points to TCRVα are conserved among other bacterial SAgs. Consequently, a new dimension of SAg biology emerges, suggesting that in addition to the conventional interactions with the TCRVβ domain, SAgs can also activate T cells through the TCRVα domain.


    Organizational Affiliation

    1] Swedish NMR Centre at University of Gothenburg, Box 465, Göteborg S-405 30, Sweden. [2] Department of Chemistry, University of Gothenburg, Box 462, Göteborg S-405 30, Sweden. [3] Swedish NMR Centre at University of Gothenburg, Box 465, Göteborg S-405 30, Sweden. [4].



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
T CELL RECEPTOR ALPHA CHAIN C REGIONA204Homo sapiensMutation(s): 1 
Gene Names: TRACTCRA
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PHAROS:  P01848
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UniProt GroupP01848
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
T CELL RECEPTOR BETA-1 CHAIN C REGIONB244Homo sapiensMutation(s): 1 
Gene Names: TRBC1
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Find proteins for P01850 (Homo sapiens)
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UniProt GroupP01850
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
ENTEROTOXIN HC217Staphylococcus aureusMutation(s): 0 
Gene Names: entHseh
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UniProt GroupP0A0M0
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
HLA CLASS II HISTOCOMPATIBILITY ANTIGEN, DR ALPHA CHAIN,D182Homo sapiensMutation(s): 0 
Gene Names: HLA-DRAHLA-DRA1
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GTEx:  ENSG00000204287 
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Entity ID: 5
MoleculeChainsSequence LengthOrganismDetailsImage
MAJOR HISTOCOMPATIBILITY COMPLEX CLASS II BETA CHAINE190Homo sapiensMutation(s): 0 
Gene Names: HLA-DRB1
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PHAROS:  P01911
GTEx:  ENSG00000196126 
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Entity ID: 6
MoleculeChainsSequence LengthOrganismDetailsImage
HEMAGGLUTININF13Influenza A virusMutation(s): 0 
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Find proteins for Q03909 (Influenza A virus (strain A/Equine/Jillin/1/1989 H3N8))
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UniProt GroupQ03909
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Small Molecules
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.272 
  • R-Value Work: 0.222 
  • R-Value Observed: 0.224 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 191.18α = 90
b = 48.89β = 113.55
c = 166.72γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
MOSFLMdata reduction
SCALAdata scaling
PHASERphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2010-11-24
    Type: Initial release
  • Version 1.1: 2011-08-03
    Changes: Database references, Non-polymer description, Version format compliance