1bvt: Difference between revisions

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New page: left|200px<br /><applet load="1bvt" size="450" color="white" frame="true" align="right" spinBox="true" caption="1bvt, resolution 1.85Å" /> '''METALLO-BETA-LACTAMA...
 
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[[Image:1bvt.gif|left|200px]]<br /><applet load="1bvt" size="450" color="white" frame="true" align="right" spinBox="true"
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'''METALLO-BETA-LACTAMASE FROM BACILLUS CEREUS 569/H/9'''<br />


==Overview==
==METALLO-BETA-LACTAMASE FROM BACILLUS CEREUS 569/H/9==
Class B beta-lactamases are wide spectrum enzymes which require bivalent, metal ions for activity. The structure of the class B zinc-ion-dependent, beta-lactamase from Bacillus cereus (BCII) has been refined at 1.85 A, resolution using data collected on cryocooled crystals (100 K). The enzyme, from B. cereus has a molecular mass of 24 946 Da and is folded into a, beta-sandwich structure with helices on the external faces. The active, site is located in a groove running between the two beta-sheets [Carfi et, al. (1995). EMBO J. 14, 4914-4921]. The 100 K high-resolution BCII, structure shows one fully and one partially occupied zinc sites. The zinc, ion in the fully occupied site (the catalytic zinc) is coordinated by, three histidines and one water molecule. The second zinc ion is at 3.7 A, from the first one and is coordinated by one histidine, one cysteine, one, aspartate and one unknown molecule (most likely a carbonate ion). In the, B. cereus zinc beta-lactamase the affinity for the second metal-ion is low, at the pH of crystallization (Kd = 25 mM, 293 K; [Baldwin et al. (1978)., Biochem. J. 175, 441-447] and the dissociation constant of the second zinc, ion was thus apparently decreased at the cryogenic temperature. In, addition, the structure of the apo enzyme was determined at 2.5 A, resolution. The removal of the zinc ion by chelating agents causes small, changes in the active-site environment.
<StructureSection load='1bvt' size='340' side='right'caption='[[1bvt]], [[Resolution|resolution]] 1.85&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[1bvt]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Bacillus_cereus Bacillus cereus]. This structure supersedes the now removed PDB entry [http://oca.weizmann.ac.il/oca-bin/send-pdb?obs=1&id=1bme 1bme]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1BVT OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1BVT FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.85&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=BCT:BICARBONATE+ION'>BCT</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></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=1bvt FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1bvt OCA], [https://pdbe.org/1bvt PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1bvt RCSB], [https://www.ebi.ac.uk/pdbsum/1bvt PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1bvt ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/BLA2_BACCE BLA2_BACCE] Can hydrolyze carbapenem compounds.
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
Check<jmol>
  <jmolCheckbox>
    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/bv/1bvt_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
    <text>to colour the structure by Evolutionary Conservation</text>
  </jmolCheckbox>
</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=1bvt ConSurf].
<div style="clear:both"></div>


==About this Structure==
==See Also==
1BVT 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 ZN and BCT as [http://en.wikipedia.org/wiki/ligands ligands]. This structure superseeds the now removed PDB entry 1BME. 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] Full crystallographic information is available from [http://ispc.weizmann.ac.il/oca-bin/ocashort?id=1BVT OCA].
*[[Beta-lactamase 3D structures|Beta-lactamase 3D structures]]
 
__TOC__
==Reference==
</StructureSection>
1.85 A resolution structure of the zinc (II) beta-lactamase from Bacillus cereus., Carfi A, Duee E, Galleni M, Frere JM, Dideberg O, Acta Crystallogr D Biol Crystallogr. 1998 May 1;54(Pt 3):313-23. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=9761898 9761898]
[[Category: Bacillus cereus]]
[[Category: Bacillus cereus]]
[[Category: Beta-lactamase]]
[[Category: Large Structures]]
[[Category: Single protein]]
[[Category: Carfi A]]
[[Category: Carfi, A.]]
[[Category: Dideberg O]]
[[Category: Dideberg, O.]]
[[Category: Duee E]]
[[Category: Duee, E.]]
[[Category: BCT]]
[[Category: ZN]]
[[Category: hydrolase (beta-lactamase)]]
[[Category: metallo beta-lactamase]]
[[Category: zinc]]
 
''Page seeded by [http://ispc.weizmann.ac.il/oca OCA ] on Tue Nov 20 11:57:36 2007''

Latest revision as of 09:39, 7 February 2024

METALLO-BETA-LACTAMASE FROM BACILLUS CEREUS 569/H/9METALLO-BETA-LACTAMASE FROM BACILLUS CEREUS 569/H/9

Structural highlights

1bvt is a 1 chain structure with sequence from Bacillus cereus. This structure supersedes the now removed PDB entry 1bme. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:X-ray diffraction, Resolution 1.85Å
Ligands:,
Resources:FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

BLA2_BACCE Can hydrolyze carbapenem compounds.

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

See Also

1bvt, resolution 1.85Å

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