This old version of Proteopedia is provided for student assignments while the new version is undergoing repairs. Content and edits done in this old version of Proteopedia after March 1, 2026 will eventually be lost when it is retired in about June of 2026.

Apply for new accounts at the new Proteopedia. Your logins will work in both the old and new versions.

3rxx

From Proteopedia

(Difference between revisions)

Jump to: navigation, search

Current revision

KPC-2 carbapenemase in complex with 3-NPBA

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/3rxx"

Categories: Klebsiella pneumoniae | Large Structures | Ke W | Van den Akker F

@@ Line 1: / Line 1: @@
 ==KPC-2 carbapenemase in complex with 3-NPBA==
-<StructureSection load='3rxx' size='340' side='right' caption='[[3rxx]], [[Resolution|resolution]] 1.62&Aring;' scene=''>
+<StructureSection load='3rxx' size='340' side='right'caption='[[3rxx]], [[Resolution|resolution]] 1.62&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[3rxx]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Klebsiella_pneumoniae Klebsiella pneumoniae]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3RXX OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3RXX FirstGlance]. <br>
+<table><tr><td colspan='2'>[[3rxx]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Klebsiella_pneumoniae Klebsiella pneumoniae]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3RXX OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3RXX FirstGlance]. <br>
-</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=NPB:3-NITROPHENYLBORONIC+ACID'>NPB</scene></td></tr>
+</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.62&#8491;</td></tr>
-<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[3qxw|3qxw]]</td></tr>
+<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=NPB:3-NITROPHENYLBORONIC+ACID'>NPB</scene></td></tr>
-<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">bla, BLAKPC-2, kpc, kpc1 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=573 Klebsiella pneumoniae])</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=3rxx FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3rxx OCA], [https://pdbe.org/3rxx PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3rxx RCSB], [https://www.ebi.ac.uk/pdbsum/3rxx PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3rxx ProSAT]</span></td></tr>
-<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Beta-lactamase Beta-lactamase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.5.2.6 3.5.2.6] </span></td></tr>
-<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3rxx FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3rxx OCA], [http://www.rcsb.org/pdb/explore.do?structureId=3rxx RCSB], [http://www.ebi.ac.uk/pdbsum/3rxx PDBsum]</span></td></tr>
 </table>
-<div style="background-color:#fffaf0;">
+== Function ==
-== Publication Abstract from PubMed ==
+[https://www.uniprot.org/uniprot/BLKPC_KLEPN BLKPC_KLEPN] Hydrolyzes carbapenems, penicillins, cephalosporins and monobactams with varying efficiency.
-Class A carbapenemases are a major threat to the potency of carbapenem antibiotics. A widespread carbapenemase, KPC-2, is not easily inhibited by beta-lactamase inhibitors (i.e., clavulanic acid, sulbactam, and tazobactam). To discover different mechanisms of inhibition of KPC-2, we determined the crystal structures of KPC-2 with two beta-lactamase inhibitors that possess different inactivation mechanisms and kinetics. The first complex is of a small boronic acid compound, 3-nitrophenyl boronic acid (3-NPBA) bound to KPC-2 determined at 1.62 A resolution. 3-NPBA demonstrates a K(m) value of 1.0 +/- 0.1 muM for KPC-2 and blocks the active site by making a reversible covalent interaction with the catalytic S70 residue. The two boron hydroxyl atoms of 3-NPBA are positioned in the oxyanion hole and the deacylation water pocket, respectively. In addition, the aromatic ring of 3-NPBA makes an edge-to-face interaction with W105 in the active site. The structure of KPC-2 with the penam sulfone, PSR-3-226, was determined at 1.26 A resolution. PSR-3-226 displays a K(m) value of 3.8 +/- 0.4 muM for KPC-2 and the k(inact) is 0.034 +/- 0.003 s(-1). Covalently bound to S70, PSR-3-226 forms a trans-enamine intermediate in the KPC-2 active site. The predominant active site interactions are generated via the carbonyl oxygen, which resides in the oxyanion hole, and the carboxyl moiety of PSR-3-226 which interacts with N132, N170, and E166. 3-NPBA and PSR-3-226 are the first beta-lactamase inhibitors to be trapped as an acyl-enzyme complex with KPC-2. The structural and inhibitory insights gained herein could aid in the design of potent KPC-2 inhibitors.
-Crystal Structures of KPC-2 beta-Lactamase in Complex with 3-NPBA and PSR-3-226.,Ke W, Bethel CR, Papp-Wallace KM, Pagadala SR, Nottingham M, Fernandez D, Buynak JD, Bonomo RA, van den Akker F Antimicrob Agents Chemother. 2012 Feb 13. PMID:22330909<ref>PMID:22330909</ref>
-From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
-</div>
 ==See Also==
-*[[Beta-lactamase|Beta-lactamase]]
+*[[Beta-lactamase 3D structures|Beta-lactamase 3D structures]]
-== References ==
-<references/>
 __TOC__
 </StructureSection>
-[[Category: Beta-lactamase]]
 [[Category: Klebsiella pneumoniae]]
-[[Category: Akker, F van den]]
+[[Category: Large Structures]]
-[[Category: Ke, W]]
+[[Category: Ke W]]
-[[Category: Hydrolase-hydrolase inhibitor complex]]
+[[Category: Van den Akker F]]
-[[Category: Inhibitor]]

3rxx

From Proteopedia

Current revision

KPC-2 carbapenemase in complex with 3-NPBA

Structural highlights

Function

See Also

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

Personal tools

Navigation

Search

Toolbox