==STAPHYLOCOCCAL ENTEROTOXIN A MUTANT VACCINE==

<StructureSection load='1dyq' size='340' side='right'caption='[[1dyq]], [[Resolution|resolution]] 1.50&Aring;' scene=''>

<table><tr><td colspan='2'>[[1dyq]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/"micrococcus_aureus"_(rosenbach_1884)_zopf_1885 "micrococcus aureus" (rosenbach 1884) zopf 1885]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1DYQ OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1DYQ FirstGlance]. <br>

</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr>

<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1dyq FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1dyq OCA], [http://pdbe.org/1dyq PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1dyq RCSB], [http://www.ebi.ac.uk/pdbsum/1dyq PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1dyq ProSAT]</span></td></tr>

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== Publication Abstract from PubMed ==

Staphylococcal enterotoxins (SEs) are superantigenic protein toxins responsible for a number of life-threatening diseases. The X-ray structure of a staphylococcal enterotoxin A (SEA) triple-mutant (L48R, D70R, and Y92A) vaccine reveals a cascade of structural rearrangements located in three loop regions essential for binding the alpha subunit of major histocompatibility complex class II (MHC-II) molecules. A comparison of hypothetical model complexes between SEA and the SEA triple mutant with MHC-II HLA-DR1 clearly shows disruption of key ionic and hydrophobic interactions necessary for forming the complex. Extensive dislocation of the disulfide loop in particular interferes with MHC-IIalpha binding. The triple-mutant structure provides new insights into the loss of superantigenicity and toxicity of an engineered superantigen and provides a basis for further design of enterotoxin vaccines.

Structural basis for abrogated binding between staphylococcal enterotoxin A superantigen vaccine and MHC-IIalpha.,Krupka HI, Segelke BW, Ulrich RG, Ringhofer S, Knapp M, Rupp B Protein Sci. 2002 Mar;11(3):642-51. PMID:11847286<ref>PMID:11847286</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>

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<div class="pdbe-citations 1dyq" style="background-color:#fffaf0;"></div>

== References ==

<references/>

[[Category: Krupka, H I]]

[[Category: Vaccine]]