1SEB

COMPLEX OF THE HUMAN MHC CLASS II GLYCOPROTEIN HLA-DR1 AND THE BACTERIAL SUPERANTIGEN SEB

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.327 
  • R-Value Work: 0.257 
  • R-Value Observed: 0.257 

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This is version 1.2 of the entry. See complete history. 


Literature

Three-dimensional structure of a human class II histocompatibility molecule complexed with superantigen.

Jardetzky, T.S., Brown, J.H., Gorga, J.C., Stern, L.J., Urban, R.G., Chi, Y.I., Stauffacher, C., Strominger, J.L., Wiley, D.C.

(1994) Nature 368: 711-718

  • DOI: 10.1038/368711a0
  • Primary Citation of Related Structures:  
    1SEB

  • PubMed Abstract: 

    • The structure of a bacterial superantigen, Staphylococcus aureus enterotoxin B, bound to a human class II histocompatibility complex molecule (HLA-DR1) has been determined by X-ray crystallography. The superantigen binds as an intact protein outside the conventional peptide antigen-binding site of the class II major histocompatibility complex (MHC) molecule ...

    The structure of a bacterial superantigen, Staphylococcus aureus enterotoxin B, bound to a human class II histocompatibility complex molecule (HLA-DR1) has been determined by X-ray crystallography. The superantigen binds as an intact protein outside the conventional peptide antigen-binding site of the class II major histocompatibility complex (MHC) molecule. No large conformational changes occur upon complex formation in either the DR1 or the enterotoxin B molecules. The structure of the complex helps explain how different class II molecules and superantigens associate and suggests a model for ternary complex formation with the T-cell antigen receptor (TCR), in which unconventional TCR-MHC contacts are possible.

    Related Citations: 
    • Crystallographic Analysis of Endogenous Peptides Associated with Hla-Dr1 Suggests a Common, Polyproline II-Like Conformation for Bound Peptides
      Jardetzky, T.S., Brown, J.H., Gorga, J.C., Stern, L.J., Urban, R.G., Strominger, J.L., Wiley, D.C.
      (1996) Proc Natl Acad Sci U S A 93: 734
    Organizational Affiliation: 

    Department of Biochemistry and Molecular Biology, Harvard University, Cambridge, Massachusetts 02138.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
HLA CLASS II HISTOCOMPATIBILITY ANTIGENA, E181Homo sapiensMutation(s): 0 
Gene Names: HLA-DRA, HLA-DRA1
UniProt & NIH Common Fund Data Resources
Find proteins for P01903 (Homo sapiens)
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Go to UniProtKB:  P01903
PHAROS:  P01903
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UniProt GroupP01903
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
HLA CLASS II HISTOCOMPATIBILITY ANTIGENB, F192Homo sapiensMutation(s): 0 
Gene Names: HLA-DRB1
UniProt & NIH Common Fund Data Resources
Find proteins for P01911 (Homo sapiens)
Explore P01911 
Go to UniProtKB:  P01911
PHAROS:  P01911
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UniProt GroupP01911
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
ENDOGENOUS PEPTIDE MODEL, POLY-ALAC, G13Homo sapiensMutation(s): 0 
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
ENTEROTOXIN TYPE BD, H234Staphylococcus aureusMutation(s): 0 
Gene Names: entB
UniProt
Find proteins for P01552 (Staphylococcus aureus)
Explore P01552 
Go to UniProtKB:  P01552
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UniProt GroupP01552
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Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.327 
  • R-Value Work: 0.257 
  • R-Value Observed: 0.257 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 95α = 90
b = 114.7β = 90
c = 149.8γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
X-PLORmodel building
X-PLORrefinement
X-PLORphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1996-06-20
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance