6ogo
From Proteopedia
(Difference between revisions)
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==Crystal structure of NDM-9 metallo-beta-lactamase== | ==Crystal structure of NDM-9 metallo-beta-lactamase== | ||
| - | <StructureSection load='6ogo' size='340' side='right'caption='[[6ogo]]' scene=''> | + | <StructureSection load='6ogo' size='340' side='right'caption='[[6ogo]], [[Resolution|resolution]] 1.43Å' scene=''> |
== Structural highlights == | == Structural highlights == | ||
| - | <table><tr><td colspan='2'>Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6OGO OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=6OGO FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[6ogo]] is a 3 chain structure with sequence from [http://en.wikipedia.org/wiki/"bacillus_coli"_migula_1895 "bacillus coli" migula 1895]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6OGO OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=6OGO FirstGlance]. <br> |
| - | </td></tr><tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://proteopedia.org/fgij/fg.htm?mol=6ogo FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6ogo OCA], [http://pdbe.org/6ogo PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=6ogo RCSB], [http://www.ebi.ac.uk/pdbsum/6ogo PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=6ogo ProSAT]</span></td></tr> | + | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=EDO:1,2-ETHANEDIOL'>EDO</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=PEG:DI(HYDROXYETHYL)ETHER'>PEG</scene>, <scene name='pdbligand=PGE:TRIETHYLENE+GLYCOL'>PGE</scene>, <scene name='pdbligand=PO4:PHOSPHATE+ION'>PO4</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr> |
| + | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">BK248_28090, BK292_25365, BK373_25580, BK383_27845, CA593_27010 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=562 "Bacillus coli" Migula 1895])</td></tr> | ||
| + | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://proteopedia.org/fgij/fg.htm?mol=6ogo FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6ogo OCA], [http://pdbe.org/6ogo PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=6ogo RCSB], [http://www.ebi.ac.uk/pdbsum/6ogo PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=6ogo ProSAT]</span></td></tr> | ||
</table> | </table> | ||
| + | <div style="background-color:#fffaf0;"> | ||
| + | == Publication Abstract from PubMed == | ||
| + | Two accessory loop regions that are present in numerous variants of New Delhi metallo-beta-lactamases (NDM) are important for the enzymatic activity. The first one is a flexible loop L3 that is located near the active site and is thought to play an important role in the catalytic process. The second region, Omega loop is located close to a structural element that coordinates two essential zinc ions. Both loops are not involved in any specific interactions with a substrate. Herein, we investigated how the length and hydrophobicity of loop L3 influence the enzymatic activity of NDMs, by analyzing mutants of NDM-1 with various deletions/point mutations within the L3 loop. We also investigated NDM variants with sequence variations/artificial deletions within the Omega loop. For all these variants we determined kinetic parameters for the hydrolysis of ampicillin, imipenem, and a chromogenic cephalosporin (CENTA). None of the mutations in the L3 loop completely abolished the enzymatic activity of NDM-1. Our results suggest that various elements of the loop play different roles in the hydrolysis of different substrates and the flexibility of the loop seems necessary to fulfill the requirements imposed by various substrates. Deletions within the Omega loop usually enhanced the enzymatic activity, particularly for the hydrolysis of ampicillin and imipenem. However, the exact role of the Omega loop in the catalytic reaction remains unclear. In our kinetic tests, the NDM enzymes were inhibited in the beta-lactamase reaction by the CENTA substrate. We also present the X-ray crystal structures of the NDM-1, NDM-9 and NDM-12 proteins. | ||
| + | |||
| + | Flexible loops of New Delhi metallo-beta-lactamase modulate its activity towards different substrates.,Raczynska JE, Imiolczyk B, Komorowska M, Sliwiak J, Czyrko-Horczak J, Brzezinski K, Jaskolski M Int J Biol Macromol. 2020 Apr 28;158:104-115. doi:, 10.1016/j.ijbiomac.2020.04.219. PMID:32353499<ref>PMID:32353499</ref> | ||
| + | |||
| + | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | ||
| + | </div> | ||
| + | <div class="pdbe-citations 6ogo" style="background-color:#fffaf0;"></div> | ||
| + | == References == | ||
| + | <references/> | ||
__TOC__ | __TOC__ | ||
</StructureSection> | </StructureSection> | ||
| + | [[Category: Bacillus coli migula 1895]] | ||
[[Category: Large Structures]] | [[Category: Large Structures]] | ||
| - | [[Category: Imiolczyk B]] | + | [[Category: Imiolczyk, B]] |
| - | [[Category: Jaskolski M]] | + | [[Category: Jaskolski, M]] |
| - | [[Category: Raczynska | + | [[Category: Raczynska, J E]] |
| + | [[Category: Hydrolase]] | ||
| + | [[Category: Metallo-beta-lactamase]] | ||
| + | [[Category: Ndm]] | ||
Revision as of 05:48, 13 May 2020
Crystal structure of NDM-9 metallo-beta-lactamase
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