View source for 8gup


==Crystal structure of EsaG from Staphylococcus aureus==
<StructureSection load='8gup' size='340' side='right'caption='[[8gup]], [[Resolution|resolution]] 2.30&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[8gup]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Staphylococcus_aureus_subsp._aureus_NCTC_8325 Staphylococcus aureus subsp. aureus NCTC 8325]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=8GUP OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=8GUP 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]] 2.298725&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CIT:CITRIC+ACID'>CIT</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=8gup FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=8gup OCA], [https://pdbe.org/8gup PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=8gup RCSB], [https://www.ebi.ac.uk/pdbsum/8gup PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=8gup ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/ESSG_STAA8 ESSG_STAA8] Component of the type VII secretion system (Ess). Acts also as part of toxin-antitoxin system. Counteracts the toxic effect of EssD via direct interaction.<ref>PMID:27723728</ref> 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Toxin EsaD secreted by some S. aureus strains through the type VII secretion system (T7SS) specifically kills those strains lacking the antitoxin EsaG. Here we report the structures of EsaG, the nuclease domain of EsaD and their complex, which together reveal an inhibition mechanism that relies on significant conformational change of the toxin. To inhibit EsaD, EsaG breaks the nuclease domain of EsaD protein into two independent fragments that, in turn, sandwich EsaG. The originally well-folded betabetaalpha-metal finger connecting the two fragments is stretched to become a disordered loop, leading to disruption of the catalytic site of EsaD and loss of nuclease activity. This mechanism is distinct from that of the other Type II toxin-antitoxin systems, which utilize an intrinsically disordered region on the antitoxins to cover the active site of the toxins. This study paves the way for developing therapeutic approaches targeting this antagonism.

A toxin-deformation dependent inhibition mechanism in the T7SS toxin-antitoxin system of Gram-positive bacteria.,Wang Y, Zhou Y, Shi C, Liu J, Lv G, Huang H, Li S, Duan L, Zheng X, Liu Y, Zhou H, Wang Y, Li Z, Ding K, Sun P, Huang Y, Lu X, Zhang ZM Nat Commun. 2022 Oct 28;13(1):6434. doi: 10.1038/s41467-022-34034-w. PMID:36307446<ref>PMID:36307446</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 8gup" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Staphylococcus aureus subsp. aureus NCTC 8325]]
[[Category: Wang YJ]]
[[Category: Zhang ZM]]