1HXY

CRYSTAL STRUCTURE OF STAPHYLOCOCCAL ENTEROTOXIN H IN COMPLEX WITH HUMAN MHC CLASS II


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.258 
  • R-Value Work: 0.202 

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This is version 1.3 of the entry. See complete history


Literature

Crystal Structure of a Superantigen Bound to MHC Class II Displays Zinc and Peptide Dependence

Petersson, K.Hakansson, M.Nilsson, H.Forsberg, G.Svensson, L.A.Liljas, A.Walse, B.

(2001) EMBO J 20: 3306-3312

  • DOI: 10.1093/emboj/20.13.3306
  • Primary Citation of Related Structures:  
    1HXY

  • PubMed Abstract: 
  • The three-dimensional structure of a bacterial superantigen, Staphylococcus aureus enterotoxin H (SEH), bound to human major histocompatibility complex (MHC) class II (HLA-DR1) has been determined by X-ray crystallography to 2.6 A resolution (1HXY). The superantigen binds on top of HLA-DR1 in a completely different way from earlier co-crystallized superantigens from S ...

    The three-dimensional structure of a bacterial superantigen, Staphylococcus aureus enterotoxin H (SEH), bound to human major histocompatibility complex (MHC) class II (HLA-DR1) has been determined by X-ray crystallography to 2.6 A resolution (1HXY). The superantigen binds on top of HLA-DR1 in a completely different way from earlier co-crystallized superantigens from S.aureus. SEH interacts with high affinity through a zinc ion with the beta1 chain of HLA-DR1 and also with the peptide presented by HLA-DR1. The structure suggests that all superantigens interacting with MHC class II in a zinc-dependent manner present the superantigen in a common way. This suggests a new model for ternary complex formation with the T-cell receptor (TCR), in which a contact between the TCR and the MHC class II is unlikely.


    Organizational Affiliation

    Molecular Biophysics, Centre for Chemistry and Chemical Engineering, Lund University, PO Box 124, S-221 00 Lund, Sweden.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
HLA CLASS II HISTOCOMPATIBILITY ANTIGEN, DR ALPHA CHAINA182Homo sapiensMutation(s): 0 
Gene Names: HLA-DRAHLA-DRA1
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Find proteins for P01903 (Homo sapiens)
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PHAROS:  P01903
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
HLA CLASS II HISTOCOMPATIBILITY ANTIGEN, DR-1 BETA CHAINB190Homo sapiensMutation(s): 0 
Gene Names: HLA-DRB1
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Find proteins for P01911 (Homo sapiens)
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PHAROS:  P01911
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
HEMAGGLUTININC13N/AMutation(s): 0 
UniProt
Find proteins for Q03909 (Influenza A virus (strain A/Equine/Jillin/1/1989 H3N8))
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  • Reference Sequence
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
ENTEROTOXIN HD213Staphylococcus aureusMutation(s): 0 
Gene Names: entHseh
UniProt
Find proteins for P0A0M0 (Staphylococcus aureus)
Explore P0A0M0 
Go to UniProtKB:  P0A0M0
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download Ideal Coordinates CCD File 
E [auth D]ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.258 
  • R-Value Work: 0.202 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 123.624α = 90
b = 122.843β = 100.13
c = 48.513γ = 90
Software Package:
Software NamePurpose
XDSdata scaling
TRUNCATEdata reduction
AMoREphasing
CNSrefinement
XDSdata reduction
CCP4data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2001-06-27
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2017-10-04
    Changes: Data collection, Refinement description