1kvl: Difference between revisions
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==X-ray Crystal Structure of AmpC S64G Mutant beta-Lactamase in Complex with Substrate and Product Forms of Cephalothin== | ==X-ray Crystal Structure of AmpC S64G Mutant beta-Lactamase in Complex with Substrate and Product Forms of Cephalothin== | ||
<StructureSection load='1kvl' size='340' side='right' caption='[[1kvl]], [[Resolution|resolution]] 1.53Å' scene=''> | <StructureSection load='1kvl' size='340' side='right' caption='[[1kvl]], [[Resolution|resolution]] 1.53Å' scene=''> | ||
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<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">K12 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=562 "Bacillus coli" Migula 1895])</td></tr> | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">K12 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=562 "Bacillus coli" Migula 1895])</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=1kvl FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1kvl OCA], [http://pdbe.org/1kvl PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1kvl RCSB], [http://www.ebi.ac.uk/pdbsum/1kvl 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=1kvl FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1kvl OCA], [http://pdbe.org/1kvl PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1kvl RCSB], [http://www.ebi.ac.uk/pdbsum/1kvl PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1kvl ProSAT]</span></td></tr> | ||
</table> | </table> | ||
== Function == | == Function == | ||
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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/kv/1kvl_consurf.spt"</scriptWhenChecked> | <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/kv/1kvl_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 1kvl" style="background-color:#fffaf0;"></div> | <div class="pdbe-citations 1kvl" style="background-color:#fffaf0;"></div> | ||
== References == | == References == | ||
<references/> | <references/> | ||
Revision as of 00:18, 25 January 2018
X-ray Crystal Structure of AmpC S64G Mutant beta-Lactamase in Complex with Substrate and Product Forms of CephalothinX-ray Crystal Structure of AmpC S64G Mutant beta-Lactamase in Complex with Substrate and Product Forms of Cephalothin
Structural highlights
Function[AMPC_ECOLI] This protein is a serine beta-lactamase with a substrate specificity for cephalosporins. 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 PubMedBeta-lactamases hydrolyze beta-lactam antibiotics and are the leading cause of bacterial resistance to these drugs. Although beta-lactamases have been extensively studied, structures of the substrate-enzyme and product-enzyme complexes have proven elusive. Here, the structure of a mutant AmpC in complex with the beta-lactam cephalothin in its substrate and product forms was determined by X-ray crystallography to 1.53 A resolution. The acyl-enzyme intermediate between AmpC and cephalothin was determined to 2.06 A resolution. The ligand undergoes a dramatic conformational change as the reaction progresses, with the characteristic six-membered dihydrothiazine ring of cephalothin rotating by 109 degrees. These structures correspond to all three intermediates along the reaction path and provide insight into substrate recognition, catalysis, and product expulsion. Structural milestones in the reaction pathway of an amide hydrolase: substrate, acyl, and product complexes of cephalothin with AmpC beta-lactamase.,Beadle BM, Trehan I, Focia PJ, Shoichet BK Structure. 2002 Mar;10(3):413-24. PMID:12005439[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References |
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