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1bmc

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[[Image:1bmc.gif|left|200px]]<br /><applet load="1bmc" size="350" color="white" frame="true" align="right" spinBox="true"
 
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caption="1bmc, resolution 2.5&Aring;" />
 
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'''STRUCTURE OF A ZINC METALLO-BETA-LACTAMASE FROM BACILLUS CEREUS'''<br />
 
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==Overview==
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==STRUCTURE OF A ZINC METALLO-BETA-LACTAMASE FROM BACILLUS CEREUS==
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The 3-D structure of Bacillus cereus (569/H/9) beta-lactamase (EC, 3.5.2.6), which catalyses the hydrolysis of nearly all beta-lactams, has, been solved at 2.5 A resolution by the multiple isomorphous replacement, method, with density modification and phase combination, from crystals of, the native protein and of a specially designed mutant (T97C). The current, model includes 212 of the 227 amino acid residues, the zinc ion and 10, water molecules. The protein is folded into a beta beta sandwich with, helices on each external face. To our knowledge, this fold has never been, observed. An approximate internal molecular symmetry is found, with a, 2-fold axis passing roughly through the zinc ion and suggesting a possible, gene duplication. The active site is located at one edge of the beta beta, sandwich and near the N-terminal end of a helix. The zinc ion is, coordinated by three histidine residues (86, 88 and 149) and a water, molecule. A sequence comparison of the relevant metallo-beta-lactamases, based on this protein structure, highlights a few well-conserved amino, acid residues. The structure shows that most of these residues are in the, active site. Among these, aspartic acid 90 and histidine 210 participate, in a proposed catalytic mechanism for beta-lactam hydrolysis.
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<StructureSection load='1bmc' size='340' side='right'caption='[[1bmc]], [[Resolution|resolution]] 2.50&Aring;' scene=''>
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== Structural highlights ==
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<table><tr><td colspan='2'>[[1bmc]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Bacillus_cereus Bacillus cereus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1BMC OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1BMC FirstGlance]. <br>
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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]] 2.5&#8491;</td></tr>
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr>
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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=1bmc FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1bmc OCA], [https://pdbe.org/1bmc PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1bmc RCSB], [https://www.ebi.ac.uk/pdbsum/1bmc PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1bmc ProSAT]</span></td></tr>
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/BLA2_BACCE BLA2_BACCE] 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/bm/1bmc_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=1bmc ConSurf].
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<div style="clear:both"></div>
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==About this Structure==
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==See Also==
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1BMC is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Bacillus_cereus Bacillus cereus] with <scene name='pdbligand=ZN:'>ZN</scene> as [http://en.wikipedia.org/wiki/ligand ligand]. Active as [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] Known structural/functional Site: <scene name='pdbsite=ZN:Zn+Binding+Site'>ZN</scene>. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1BMC OCA].
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*[[Beta-lactamase 3D structures|Beta-lactamase 3D structures]]
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__TOC__
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==Reference==
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</StructureSection>
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The 3-D structure of a zinc metallo-beta-lactamase from Bacillus cereus reveals a new type of protein fold., Carfi A, Pares S, Duee E, Galleni M, Duez C, Frere JM, Dideberg O, EMBO J. 1995 Oct 16;14(20):4914-21. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=7588620 7588620]
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[[Category: Bacillus cereus]]
[[Category: Bacillus cereus]]
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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: Carfi A]]
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[[Category: Carfi, A.]]
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[[Category: Dideberg O]]
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[[Category: Dideberg, O.]]
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[[Category: Duee E]]
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[[Category: Duee, E.]]
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[[Category: Pares S]]
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[[Category: Pares, S.]]
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[[Category: ZN]]
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[[Category: antibiotic resistance]]
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[[Category: hydrolase (acting in cyclic amides)]]
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[[Category: signal]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Feb 3 09:33:21 2008''
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Current revision

STRUCTURE OF A ZINC METALLO-BETA-LACTAMASE FROM BACILLUS CEREUS

PDB ID 1bmc

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