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1x8i

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[[Image:1x8i.jpg|left|200px]]
 
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{{Structure
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==Crystal Structure of the Zinc Carbapenemase CphA in Complex with the Antibiotic Biapenem==
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|PDB= 1x8i |SIZE=350|CAPTION= <scene name='initialview01'>1x8i</scene>, resolution 1.90&Aring;
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<StructureSection load='1x8i' size='340' side='right'caption='[[1x8i]], [[Resolution|resolution]] 1.90&Aring;' scene=''>
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|SITE=
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== Structural highlights ==
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|LIGAND= <scene name='pdbligand=BMH:5H-PYRAZOLO(1,2-A)(1,2,4)TRIAZOL-4-IUM,+6-((2-CARBOXY-6-(1-HYDROXYETHYL)-4-METHYL-7-OXO-1-AZABICYCLO(3.2.0)HEPT-2-EN-3-YL)THIO)-6,7-DIHYDRO-,+HYDROXIDE,+INNER+SALT,+(4R-(4ALPHA,5BETA,6BETA(R*)))-'>BMH</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene>
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<table><tr><td colspan='2'>[[1x8i]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Aeromonas_hydrophila Aeromonas hydrophila]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1X8I OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1X8I FirstGlance]. <br>
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|ACTIVITY= <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>
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.9&#8491;</td></tr>
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|GENE= cphA ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=644 Aeromonas hydrophila])
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=BMH:5H-PYRAZOLO(1,2-A)(1,2,4)TRIAZOL-4-IUM,+6-((2-CARBOXY-6-(1-HYDROXYETHYL)-4-METHYL-7-OXO-1-AZABICYCLO(3.2.0)HEPT-2-EN-3-YL)THIO)-6,7-DIHYDRO-,+HYDROXIDE,+INNER+SALT,+(4R-(4ALPHA,5BETA,6BETA(R*)))-'>BMH</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr>
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|DOMAIN=
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1x8i FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1x8i OCA], [https://pdbe.org/1x8i PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1x8i RCSB], [https://www.ebi.ac.uk/pdbsum/1x8i PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1x8i ProSAT]</span></td></tr>
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|RELATEDENTRY=[[1x8g|1X8G]], [[1x8h|1X8H]]
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</table>
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|RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1x8i FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1x8i OCA], [http://www.ebi.ac.uk/pdbsum/1x8i PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1x8i RCSB]</span>
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== Function ==
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}}
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[https://www.uniprot.org/uniprot/BLAB_AERHY BLAB_AERHY] Can hydrolyze carbapenem compounds.
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== Evolutionary Conservation ==
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[[Image:Consurf_key_small.gif|200px|right]]
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Check<jmol>
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<jmolCheckbox>
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<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/x8/1x8i_consurf.spt"</scriptWhenChecked>
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
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<text>to colour the structure by Evolutionary Conservation</text>
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</jmolCheckbox>
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</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=1x8i ConSurf].
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<div style="clear:both"></div>
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'''Crystal Structure of the Zinc Carbapenemase CphA in Complex with the Antibiotic Biapenem'''
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==See Also==
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*[[Beta-lactamase 3D structures|Beta-lactamase 3D structures]]
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__TOC__
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==Overview==
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</StructureSection>
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One strategy developed by bacteria to resist the action of beta-lactam antibiotics is the expression of metallo-beta-lactamases. CphA from Aeromonas hydrophila is a member of a clinically important subclass of metallo-beta-lactamases that have only one zinc ion in their active site and for which no structure is available. The crystal structures of wild-type CphA and its N220G mutant show the structural features of the active site of this enzyme, which is modeled specifically for carbapenem hydrolysis. The structure of CphA after reaction with a carbapenem substrate, biapenem, reveals that the enzyme traps a reaction intermediate in the active site. These three X-ray structures have allowed us to propose how the enzyme recognizes carbapenems and suggest a mechanistic pathway for hydrolysis of the beta-lactam. This will be relevant for the design of metallo-beta-lactamase inhibitors as well as of antibiotics that escape their hydrolytic activity.
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==About this Structure==
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1X8I is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Aeromonas_hydrophila Aeromonas hydrophila]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1X8I OCA].
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==Reference==
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A metallo-beta-lactamase enzyme in action: crystal structures of the monozinc carbapenemase CphA and its complex with biapenem., Garau G, Bebrone C, Anne C, Galleni M, Frere JM, Dideberg O, J Mol Biol. 2005 Jan 28;345(4):785-95. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/15588826 15588826]
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[[Category: Aeromonas hydrophila]]
[[Category: Aeromonas hydrophila]]
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[[Category: Beta-lactamase]]
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[[Category: Large Structures]]
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[[Category: Single protein]]
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[[Category: Dideberg O]]
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[[Category: Dideberg, O.]]
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[[Category: Garau G]]
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[[Category: Garau, G.]]
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[[Category: hydrolase]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Mar 31 00:46:09 2008''
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Current revision

Crystal Structure of the Zinc Carbapenemase CphA in Complex with the Antibiotic Biapenem

PDB ID 1x8i

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