View source for 1aw7


==Q136A MUTANT OF TOXIC SHOCK SYNDROME TOXIN-1 FROM S. AUREUS==
<StructureSection load='1aw7' size='340' side='right'caption='[[1aw7]], [[Resolution|resolution]] 1.95&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[1aw7]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Staphylococcus_aureus Staphylococcus aureus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1AW7 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1AW7 FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.95&#8491;</td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1aw7 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1aw7 OCA], [https://pdbe.org/1aw7 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1aw7 RCSB], [https://www.ebi.ac.uk/pdbsum/1aw7 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1aw7 ProSAT]</span></td></tr>
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== Function ==
[https://www.uniprot.org/uniprot/TSST_STAAU TSST_STAAU] Responsible for the symptoms of toxic shock syndrome.
== 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/aw/1aw7_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.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=1aw7 ConSurf].
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== Publication Abstract from PubMed ==
The three-dimensional structures of five mutants of toxic shock syndrome toxin-1 (TSST-1) have been determined. These mutations are in the long central alpha helix and are useful in mapping portions of TSST-1 involved in superantigenicity and lethality. The T128A, H135A, Q139K, and I140T mutations appear to reduce superantigenicity by altering the properties of the T-cell receptor interaction surface. The Q136A mutation is at a largely buried site and causes a dramatic change in the conformation of the beta7-beta9 loop which covers the back of the central alpha helix. As this mutation has the unique ability to reduce the toxin's lethality in rabbits while retaining its superantigenicity, it raises the possibility that this rear loop mediates the ability of TSST-1 to induce lethality and suggests a route for producing nonlethal toxins for therapeutic development.

Structures of five mutants of toxic shock syndrome toxin-1 with reduced biological activity.,Earhart CA, Mitchell DT, Murray DL, Pinheiro DM, Matsumura M, Schlievert PM, Ohlendorf DH Biochemistry. 1998 May 19;37(20):7194-202. PMID:9585531<ref>PMID:9585531</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Staphylococcus aureus]]
[[Category: Earhart CA]]
[[Category: Matsumura M]]
[[Category: Mitchell DT]]
[[Category: Murray DL]]
[[Category: Ohlendorf DH]]
[[Category: Pinheiro DM]]
[[Category: Schlievert PM]]