View source for 5lkb


==Crystal structure of the Xi glutathione transferase ECM4 from Saccharomyces cerevisiae==
<StructureSection load='5lkb' size='340' side='right'caption='[[5lkb]], [[Resolution|resolution]] 1.45&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[5lkb]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Saccharomyces_cerevisiae_S288C Saccharomyces cerevisiae S288C]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5LKB OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=5LKB 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]] 1.45&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=GOL:GLYCEROL'>GOL</scene></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=5lkb FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5lkb OCA], [https://pdbe.org/5lkb PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=5lkb RCSB], [https://www.ebi.ac.uk/pdbsum/5lkb PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=5lkb ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/GTO2_YEAST GTO2_YEAST] Active as '1-Cys' thiol transferase against beta-hydroxyethyl disulfide (HED), as dehydroascorbate reductase and as dimethylarsinic acid reductase, while not active against the standard GST substrate 1-chloro-2,4-dinitrobenzene (CDNB). May be involved in cell wall organization and biogenesis.<ref>PMID:16709151</ref> 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Glutathionyl-hydroquinone reductases (GHRs) belong to the recently characterized Xi-class of glutathione transferases (GSTXs) according to unique structural properties and are present in all but animal kingdoms. The GHR ScECM4 from the yeast Saccharomyces cerevisiae has been studied since 1997 when it was found to be potentially involved in cell-wall biosynthesis. Up to now and in spite of biological studies made on this enzyme, its physiological role remains challenging. The work here reports its crystallographic study. In addition to exhibiting the general GSTX structural features, ScECM4 shows extensions including a huge loop which contributes to the quaternary assembly. These structural extensions are probably specific to Saccharomycetaceae. Soaking of ScECM4 crystals with GS-menadione results in a structure where glutathione forms a mixed disulfide bond with the cysteine 46. Solution studies confirm that ScECM4 has reductase activity for GS-menadione in presence of glutathione. Moreover, the high resolution structures allowed us to propose new roles of conserved residues of the active site to assist the cysteine 46 during the catalytic act.

Crystal Structure of Saccharomyces cerevisiae ECM4, a Xi-Class Glutathione Transferase that Reacts with Glutathionyl-(hydro)quinones.,Schwartz M, Didierjean C, Hecker A, Girardet JM, Morel-Rouhier M, Gelhaye E, Favier F PLoS One. 2016 Oct 13;11(10):e0164678. doi: 10.1371/journal.pone.0164678., eCollection 2016. PMID:27736955<ref>PMID:27736955</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 5lkb" style="background-color:#fffaf0;"></div>

==See Also==
*[[Glutathione S-transferase 3D structures|Glutathione S-transferase 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Saccharomyces cerevisiae S288C]]
[[Category: Didierjean C]]
[[Category: Favier F]]
[[Category: Gelhaye E]]
[[Category: Girardet JM]]
[[Category: Hecker A]]
[[Category: Morel-Rouhier M]]
[[Category: Schwartz M]]