View source for 6ooe


==CTX-M-27 Beta Lactamase with Compound 20==
<StructureSection load='6ooe' size='340' side='right'caption='[[6ooe]], [[Resolution|resolution]] 1.26&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6OOE OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6OOE 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]] 1.26&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=PCA:PYROGLUTAMIC+ACID'>PCA</scene>, <scene name='pdbligand=R6Z:3-(1H-tetrazol-5-yl)-N-[3-(1H-tetrazol-5-yl)phenyl]-5-(trifluoromethyl)benzamide'>R6Z</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=6ooe FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6ooe OCA], [https://pdbe.org/6ooe PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6ooe RCSB], [https://www.ebi.ac.uk/pdbsum/6ooe PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6ooe ProSAT]</span></td></tr>
</table>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Compared to aryl-aryl pi-stacking interactions, the analogous stacking of heteroarenes on amide pi systems is less well understood and vastly underutilized in structure-based drug design. Recent theoretical studies have delineated the important geometric coordinates of the interaction, some of which have been confirmed with synthetic model systems based on Rebek imides. Unfortunately, a broadly useful and tractable protein-ligand model system of this interaction has remained elusive. Here we employed a known inhibitor scaffold to study pi-stacking of diverse heteroarene substituents on the amide face of Gly238 in the cephalosporinases CTX-M-14 and CTX-M-27. Biochemical inhibition constants (K i) and biophysical binding constants (K d) were determined for nineteen new analogues against both enzymes, while multiple high-resolution co-crystal structures revealed remarkably consistent placement of the probe heteroarene on Gly238. The data presented support the predicted importance of opposing dipoles in amide-heteroarene interactions and should be useful for evaluating other theoretical predictions concerning these interactions.

An Empirical Study of Amide-Heteroarene pi-Stacking Interactions Using Reversible Inhibitors of a Bacterial Serine Hydrolase.,DeFrees K, Kemp MT, ElHilali-Pollard X, Zhang X, Mohamed A, Chen Y, Renslo AR Org Chem Front. 2019 Jun 7;6(11):1749-1756. doi: 10.1039/c9qo00342h. Epub 2019, May 15. PMID:32774871<ref>PMID:32774871</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 6ooe" style="background-color:#fffaf0;"></div>

==See Also==
*[[Beta-lactamase 3D structures|Beta-lactamase 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Chen Y]]
[[Category: Kemp M]]