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[[Image:1seb.gif|left|200px]]


{{Structure
==COMPLEX OF THE HUMAN MHC CLASS II GLYCOPROTEIN HLA-DR1 AND THE BACTERIAL SUPERANTIGEN SEB==
|PDB= 1seb |SIZE=350|CAPTION= <scene name='initialview01'>1seb</scene>, resolution 2.7&Aring;
<StructureSection load='1seb' size='340' side='right'caption='[[1seb]], [[Resolution|resolution]] 2.70&Aring;' scene=''>
|SITE=  
== Structural highlights ==
|LIGAND=  
<table><tr><td colspan='2'>[[1seb]] is a 8 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens] and [https://en.wikipedia.org/wiki/Staphylococcus_aureus Staphylococcus aureus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1SEB OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1SEB FirstGlance]. <br>
|ACTIVITY=  
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.7&#8491;</td></tr>
|GENE=  
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1seb FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1seb OCA], [https://pdbe.org/1seb PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1seb RCSB], [https://www.ebi.ac.uk/pdbsum/1seb PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1seb ProSAT]</span></td></tr>
}}
</table>
== Function ==
[https://www.uniprot.org/uniprot/ETXB_STAAU ETXB_STAAU] Staphylococcal enterotoxins cause the intoxication staphylococcal food poisoning syndrome. The illness characterized by high fever, hypotension, diarrhea, shock, and in some cases death.
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
Check<jmol>
  <jmolCheckbox>
    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/se/1seb_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview03.spt</scriptWhenUnchecked>
    <text>to colour the structure by Evolutionary Conservation</text>
  </jmolCheckbox>
</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=1seb ConSurf].
<div style="clear:both"></div>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
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.


'''COMPLEX OF THE HUMAN MHC CLASS II GLYCOPROTEIN HLA-DR1 AND THE BACTERIAL SUPERANTIGEN SEB'''
Three-dimensional structure of a human class II histocompatibility molecule complexed with superantigen.,Jardetzky TS, Brown JH, Gorga JC, Stern LJ, Urban RG, Chi YI, Stauffacher C, Strominger JL, Wiley DC Nature. 1994 Apr 21;368(6473):711-8. PMID:8152483<ref>PMID:8152483</ref>


From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 1seb" style="background-color:#fffaf0;"></div>


==Overview==
==See Also==
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.
*[[MHC 3D structures|MHC 3D structures]]
 
*[[MHC II 3D structures|MHC II 3D structures]]
==About this Structure==
== References ==
1SEB is a [[Protein complex]] structure of sequences from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens] and [http://en.wikipedia.org/wiki/Staphylococcus_aureus Staphylococcus aureus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1SEB OCA].
<references/>
 
__TOC__
==Reference==
</StructureSection>
Three-dimensional structure of a human class II histocompatibility molecule complexed with superantigen., Jardetzky TS, Brown JH, Gorga JC, Stern LJ, Urban RG, Chi YI, Stauffacher C, Strominger JL, Wiley DC, Nature. 1994 Apr 21;368(6473):711-8. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/8152483 8152483]
[[Category: Homo sapiens]]
[[Category: Homo sapiens]]
[[Category: Protein complex]]
[[Category: Large Structures]]
[[Category: Staphylococcus aureus]]
[[Category: Staphylococcus aureus]]
[[Category: Brown, J H.]]
[[Category: Brown JH]]
[[Category: Chi, Y I.]]
[[Category: Chi YI]]
[[Category: Gorga, J C.]]
[[Category: Gorga JC]]
[[Category: Jardetzky, T S.]]
[[Category: Jardetzky TS]]
[[Category: Stauffacher, C.]]
[[Category: Stauffacher C]]
[[Category: Stern, L J.]]
[[Category: Stern LJ]]
[[Category: Strominger, J L.]]
[[Category: Strominger JL]]
[[Category: Urban, R G.]]
[[Category: Urban RG]]
[[Category: Wiley, D C.]]
[[Category: Wiley DC]]
[[Category: enterotoxin peptide]]
[[Category: histocompatibility antigen]]
[[Category: mhc ii]]
[[Category: superantigen]]
[[Category: toxin]]
 
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