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| | <StructureSection load='1rcj' size='340' side='right'caption='[[1rcj]], [[Resolution|resolution]] 1.63Å' scene=''> | | <StructureSection load='1rcj' size='340' side='right'caption='[[1rcj]], [[Resolution|resolution]] 1.63Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[1rcj]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/"bacillus_pneumoniae"_(schroeter_1886)_flugge_1886 "bacillus pneumoniae" (schroeter 1886) flugge 1886]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1RCJ OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1RCJ FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[1rcj]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Klebsiella_pneumoniae Klebsiella pneumoniae]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1RCJ OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1RCJ FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=MA4:CYCLOHEXYL-HEXYL-BETA-D-MALTOSIDE'>MA4</scene>, <scene name='pdbligand=TBI:TAZOBACTAM+TRANS-ENAMINE+INTERMEDIATE'>TBI</scene></td></tr> | + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.63Å</td></tr> |
| - | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat"><div style='overflow: auto; max-height: 3em;'>[[1g56|1g56]], [[1n9b|1n9b]]</div></td></tr>
| + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=MA4:CYCLOHEXYL-HEXYL-BETA-D-MALTOSIDE'>MA4</scene>, <scene name='pdbligand=TBI:TAZOBACTAM+TRANS-ENAMINE+INTERMEDIATE'>TBI</scene></td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">BLA, SHV1 ([https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=573 "Bacillus pneumoniae" (Schroeter 1886) Flugge 1886])</td></tr> | + | |
| - | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[https://en.wikipedia.org/wiki/Beta-lactamase Beta-lactamase], with EC number [https://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'>[https://proteopedia.org/fgij/fg.htm?mol=1rcj FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1rcj OCA], [https://pdbe.org/1rcj PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1rcj RCSB], [https://www.ebi.ac.uk/pdbsum/1rcj PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1rcj ProSAT]</span></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=1rcj FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1rcj OCA], [https://pdbe.org/1rcj PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1rcj RCSB], [https://www.ebi.ac.uk/pdbsum/1rcj PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1rcj ProSAT]</span></td></tr> |
| | </table> | | </table> |
| | + | == Function == |
| | + | [https://www.uniprot.org/uniprot/BLA1_KLEPN BLA1_KLEPN] |
| | == Evolutionary Conservation == | | == Evolutionary Conservation == |
| | [[Image:Consurf_key_small.gif|200px|right]] | | [[Image:Consurf_key_small.gif|200px|right]] |
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| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Beta-lactamase]] | + | [[Category: Klebsiella pneumoniae]] |
| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| - | [[Category: Akker, F van den]]
| + | [[Category: Bonomo RA]] |
| - | [[Category: Bonomo, R A]] | + | [[Category: Carey MP]] |
| - | [[Category: Carey, M P]] | + | [[Category: Carey PR]] |
| - | [[Category: Carey, P R]] | + | [[Category: Helfand MS]] |
| - | [[Category: Helfand, M S]] | + | [[Category: Hujer AM]] |
| - | [[Category: Hujer, A M]] | + | [[Category: Padayatti PS]] |
| - | [[Category: Padayatti, P S]] | + | [[Category: Totir MA]] |
| - | [[Category: Totir, M A]] | + | [[Category: Van den Akker F]] |
| - | [[Category: Beta-lactam hydrolase]] | + | |
| - | [[Category: Covalent intermediate]]
| + | |
| - | [[Category: Detergent binding]]
| + | |
| - | [[Category: Hydrolase]]
| + | |
| - | [[Category: Inhibitor design]]
| + | |
| - | [[Category: Penicillinase]]
| + | |
| Structural highlights
Function
BLA1_KLEPN
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 PubMed
Many pathogenic bacteria develop antibiotic resistance by utilizing beta-lactamases to degrade penicillin-like antibiotics. A commonly prescribed mechanism-based inhibitor of beta-lactamases is tazobactam, which can function either irreversibly or in a transient manner. We have demonstrated previously that the reaction between tazobactam and a deacylation deficient variant of SHV-1 beta-lactamase, E166A, could be followed in single crystals using Raman microscopy [Helfand, M. S., et al. (2003) Biochemistry 42, 13386-13392]. The Raman data show that maximal populations of an enamine-like intermediate occur 20-30 min after "soaking in" has commenced. By flash-freezing crystals in this time frame, we were able to trap the enamine species. The resulting 1.63 A resolution crystal structure revealed tazobactam covalently bound in the trans-enamine intermediate state with close to 100% occupancy in the active site. The Raman data also indicated that tazobactam forms a larger population of enamine than sulbactam or clavulanic acid does and that tazobactam's intermediate is also the most long-lived. The crystal structure provides a rationale for this finding since only tazobactam is able to form favorable intra- and intermolecular interactions in the active site that stabilize this trans-enamine intermediate. These interactions involve both the sulfone and triazolyl groups that distinguish tazobactam from clavulanic acid and sulbactam, respectively. The observed stabilization of the transient intermediate of tazobactam is thought to contribute to tazobactam's superior in vitro and in vivo clinical efficacy. Understanding the structural details of differing inhibitor effectiveness can aid the design of improved mechanism-based beta-lactamase inhibitors.
Tazobactam forms a stoichiometric trans-enamine intermediate in the E166A variant of SHV-1 beta-lactamase: 1.63 A crystal structure.,Padayatti PS, Helfand MS, Totir MA, Carey MP, Hujer AM, Carey PR, Bonomo RA, van den Akker F Biochemistry. 2004 Feb 3;43(4):843-8. PMID:14744126[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Padayatti PS, Helfand MS, Totir MA, Carey MP, Hujer AM, Carey PR, Bonomo RA, van den Akker F. Tazobactam forms a stoichiometric trans-enamine intermediate in the E166A variant of SHV-1 beta-lactamase: 1.63 A crystal structure. Biochemistry. 2004 Feb 3;43(4):843-8. PMID:14744126 doi:10.1021/bi035985m
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