View source for 4bkr


==Enoyl-ACP reductase from Yersinia pestis (wildtype, removed Histag) with cofactor NADH==
<StructureSection load='4bkr' size='340' side='right'caption='[[4bkr]], [[Resolution|resolution]] 1.80&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[4bkr]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Yersinia_pestis_A1122 Yersinia pestis A1122]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4BKR OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4BKR 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]] 1.798&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=DMS:DIMETHYL+SULFOXIDE'>DMS</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=NA:SODIUM+ION'>NA</scene>, <scene name='pdbligand=NAI:1,4-DIHYDRONICOTINAMIDE+ADENINE+DINUCLEOTIDE'>NAI</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=4bkr FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4bkr OCA], [https://pdbe.org/4bkr PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4bkr RCSB], [https://www.ebi.ac.uk/pdbsum/4bkr PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4bkr ProSAT]</span></td></tr>
</table>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
The enoyl-ACP reductase (ENR) catalyzes the last reaction in the elongation cycle of the bacterial type II fatty acid biosynthesis (FAS-II) pathway. While the FabI ENR is a well-validated drug target in organisms such as Mycobacterium tuberculosis and Staphylococcus aureus, alternate ENR isoforms have been discovered in other pathogens, including the FabV enzyme that is the sole ENR in Yersinia pestis (ypFabV). Previously, we showed that the prototypical ENR inhibitor triclosan was a poor inhibitor of ypFabV and that inhibitors based on the 2-pyridone scaffold were more potent [Hirschbeck, M. (2012) Structure 20 (1), 89-100]. These studies were performed with the T276S FabV variant. In the work presented here, we describe a detailed examination of the mechanism and inhibition of wild-type ypFabV and the T276S variant. The T276S mutation significantly reduces the affinity of diphenyl ether inhibitors for ypFabV (20-fold --&gt; 100-fold). In addition, while T276S ypFabV generally displays an affinity for 2-pyridone inhibitors higher than that of the wild-type enzyme, the 4-pyridone scaffold yields compounds with similar affinity for both wild-type and T276S ypFabV. T276 is located at the N-terminus of the helical substrate-binding loop, and structural studies coupled with site-directed mutagenesis reveal that alterations in this residue modulate the size of the active site portal. Subsequently, we were able to probe the mechanism of time-dependent inhibition in this enzyme family by extending the inhibition studies to include P142W ypFabV, a mutation that results in a gain of slow-onset inhibition for the 4-pyridone PT156.

Selectivity of Pyridone- and Diphenyl Ether-Based Inhibitors for the Yersinia pestis FabV Enoyl-ACP Reductase.,Neckles C, Pschibul A, Lai CT, Hirschbeck M, Kuper J, Davoodi S, Zou J, Liu N, Pan P, Shah S, Daryaee F, Bommineni GR, Lai C, Simmerling C, Kisker C, Tonge PJ Biochemistry. 2016 May 31;55(21):2992-3006. doi: 10.1021/acs.biochem.5b01301., Epub 2016 May 17. PMID:27136302<ref>PMID:27136302</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 4bkr" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Yersinia pestis A1122]]
[[Category: Hirschbeck MW]]
[[Category: Kisker C]]
[[Category: Neckles C]]
[[Category: Tonge PJ]]