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==Rv2466c Mediates the Activation of TP053 To Kill Replicating and Non-replicating Mycobacterium tuberculosis==
<StructureSection load='4nxi' size='340' side='right'caption='[[4nxi]], [[Resolution|resolution]] 1.70&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[4nxi]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Mycobacterium_tuberculosis_H37Rv Mycobacterium tuberculosis H37Rv]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4NXI OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4NXI 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]] 1.698&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=EDO:1,2-ETHANEDIOL'>EDO</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</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=4nxi FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4nxi OCA], [https://pdbe.org/4nxi PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4nxi RCSB], [https://www.ebi.ac.uk/pdbsum/4nxi PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4nxi ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/TRLR_MYCTU TRLR_MYCTU] In vitro, the reduced form of Rv2466c catalyzes the reduction and activation of TP053, which is a thienopyrimidine derivative drug that can kill both replicating and non-replicating M.tuberculosis.<ref>PMID:24877756</ref> 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
The emergence of multidrug- and extensively drug-resistant strains of Mycobacterium tuberculosis highlights the need to discover new antitubercular agents. Here we describe the synthesis and characterization of a new series of thienopyrimidine (TP) compounds that kill both replicating and non-replicating M. tuberculosis. The strategy to determine the mechanism of action of these TP derivatives was to generate resistant mutants to the most effective compound TP053 and to isolate the genetic mutation responsible for this phenotype. The only non-synonymous mutation found was a g83c transition in the Rv2466c gene, resulting in the replacement of tryptophan 28 by a serine. The Rv2466c overexpression increased the sensitivity of M. tuberculosis wild-type and resistant mutant strains to TP053, indicating that TP053 is a prodrug activated by Rv2466c. Biochemical studies performed with purified Rv2466c demonstrated that only the reduced form of Rv2466c can activate TP053. The 1.7 A resolution crystal structure of the reduced form of Rv2466c, a protein whose expression is transcriptionally regulated during the oxidative stress response, revealed a unique homodimer in which a beta-strand is swapped between the thioredoxin domains of each subunit. A pronounced groove harboring the unusual active-site motif CPWC might account for the uncommon reactivity profile of the protein. The mutation of Trp28Ser clearly predicts structural defects in the thioredoxin fold, including the destabilization of the dimerization core and the CPWC motif, likely impairing the activity of Rv2466c against TP053. Altogether our experimental data provide insights into the molecular mechanism underlying the anti-mycobacterial activity of TP-based compounds, paving the way for future drug development programmes.

Rv2466c mediates the activation of TP053 to kill replicating and non-replicating Mycobacterium tuberculosis.,Albesa-Jove D, Chiarelli LR, Makarov V, Pasca MR, Urresti S, Mori G, Salina E, Vocat A, Comino N, Mohorko E, Ryabova S, Pfieiffer B, Lopes Ribeiro AL, Rodrigo-Unzueta A, Tersa M, Zanoni G, Buroni S, Altmann KH, Hartkoorn RC, Glockshuber R, Cole ST, Riccardi G, Guerin ME ACS Chem Biol. 2014 Jul 18;9(7):1567-75. doi: 10.1021/cb500149m. Epub 2014 Jun, 13. PMID:24877756<ref>PMID:24877756</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 4nxi" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Mycobacterium tuberculosis H37Rv]]
[[Category: Albesa-Jove D]]
[[Category: Comino N]]
[[Category: Guerin ME]]
[[Category: Urresti S]]