1ko3: Difference between revisions
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==VIM-2, a Zn-beta-lactamase from Pseudomonas aeruginosa with Cys221 reduced== | ==VIM-2, a Zn-beta-lactamase from Pseudomonas aeruginosa with Cys221 reduced== | ||
<StructureSection load='1ko3' size='340' side='right' caption='[[1ko3]], [[Resolution|resolution]] 1.91Å' scene=''> | <StructureSection load='1ko3' size='340' side='right' caption='[[1ko3]], [[Resolution|resolution]] 1.91Å' scene=''> | ||
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<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">blaVIM-2 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=287 "Bacillus aeruginosus" (Schroeter 1872) Trevisan 1885])</td></tr> | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">blaVIM-2 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=287 "Bacillus aeruginosus" (Schroeter 1872) Trevisan 1885])</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='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=1ko3 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1ko3 OCA], [http://pdbe.org/1ko3 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1ko3 RCSB], [http://www.ebi.ac.uk/pdbsum/1ko3 PDBsum]</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=1ko3 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1ko3 OCA], [http://pdbe.org/1ko3 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1ko3 RCSB], [http://www.ebi.ac.uk/pdbsum/1ko3 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1ko3 ProSAT]</span></td></tr> | ||
</table> | </table> | ||
== Evolutionary Conservation == | == Evolutionary Conservation == | ||
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Check<jmol> | Check<jmol> | ||
<jmolCheckbox> | <jmolCheckbox> | ||
<scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/ko/1ko3_consurf.spt"</scriptWhenChecked> | <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/ko/1ko3_consurf.spt"</scriptWhenChecked> | ||
<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked> | <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked> | ||
<text>to colour the structure by Evolutionary Conservation</text> | <text>to colour the structure by Evolutionary Conservation</text> | ||
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</div> | </div> | ||
<div class="pdbe-citations 1ko3" style="background-color:#fffaf0;"></div> | <div class="pdbe-citations 1ko3" style="background-color:#fffaf0;"></div> | ||
== References == | == References == | ||
<references/> | <references/> | ||
Revision as of 00:25, 25 January 2018
VIM-2, a Zn-beta-lactamase from Pseudomonas aeruginosa with Cys221 reducedVIM-2, a Zn-beta-lactamase from Pseudomonas aeruginosa with Cys221 reduced
Structural highlights
Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMedThe crystal structures of the universally widespread metallo-beta-lactamase (MBL) Verona integron-encoded MBL (VIM)-2 from Pseudomonas aeruginosa have been solved in their native form as well as in an unexpected oxidised form. This carbapenem-hydrolysing enzyme belongs to the so-called B1 subfamily of MBLs and shares the folding of alpha beta/beta alpha sandwich, consisting of a core of beta-sheet surrounded by alpha-helices. Surprisingly, it showed a high tendency to be strongly oxidised at the catalytic cysteine located in the Cys site, Cys221, which, in the oxidised structure, becomes a cysteinesulfonic residue. Its native structure was obtained only in the presence of Tris(2-carboxyethyl)phosphine. This oxidation might be a consequence of a lower affinity for the second Zn located in the Cys site that would also explain the observed susceptibility of VIM-2 to chelating agents. This modification, if present in nature, might play a role in catalytic down-regulation. Comparison between native and oxidised VIM-2 and a predicted model of VIM-1 (which shows one residue different in the Cys site compared with VIM-2) is performed to explain the different activities and antibiotic specificities. The three-dimensional structure of VIM-2, a Zn-beta-lactamase from Pseudomonas aeruginosa in its reduced and oxidised form.,Garcia-Saez I, Docquier JD, Rossolini GM, Dideberg O J Mol Biol. 2008 Jan 18;375(3):604-11. Epub 2007 Nov 13. PMID:18061205[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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