1o07: Difference between revisions

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==Crystal Structure of the complex between Q120L/Y150E mutant of AmpC and a beta-lactam inhibitor (MXG)==
==Crystal Structure of the complex between Q120L/Y150E mutant of AmpC and a beta-lactam inhibitor (MXG)==
<StructureSection load='1o07' size='340' side='right' caption='[[1o07]], [[Resolution|resolution]] 1.71&Aring;' scene=''>
<StructureSection load='1o07' size='340' side='right'caption='[[1o07]], [[Resolution|resolution]] 1.71&Aring;' scene=''>
== Structural highlights ==
== Structural highlights ==
<table><tr><td colspan='2'>[[1o07]] is a 2 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=1O07 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1O07 FirstGlance]. <br>
<table><tr><td colspan='2'>[[1o07]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1O07 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1O07 FirstGlance]. <br>
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=K:POTASSIUM+ION'>K</scene>, <scene name='pdbligand=MXG:2-(1-{2-[4-(2-ACETYLAMINO-PROPIONYLAMINO)-4-CARBOXY-BUTYRYLAMINO]-6-AMINO-HEXANOYLAMINO}-2-OXO-ETHYL)-5-METHYLENE-5,6-DIHYDRO-2H-[1,3]THIAZINE-4-CARBOXYLIC+ACID'>MXG</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]] 1.71&#8491;</td></tr>
<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><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></td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=K:POTASSIUM+ION'>K</scene>, <scene name='pdbligand=MXG:2-(1-{2-[4-(2-ACETYLAMINO-PROPIONYLAMINO)-4-CARBOXY-BUTYRYLAMINO]-6-AMINO-HEXANOYLAMINO}-2-OXO-ETHYL)-5-METHYLENE-5,6-DIHYDRO-2H-[1,3]THIAZINE-4-CARBOXYLIC+ACID'>MXG</scene></td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1o07 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1o07 OCA], [http://pdbe.org/1o07 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1o07 RCSB], [http://www.ebi.ac.uk/pdbsum/1o07 PDBsum]</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=1o07 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1o07 OCA], [https://pdbe.org/1o07 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1o07 RCSB], [https://www.ebi.ac.uk/pdbsum/1o07 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1o07 ProSAT]</span></td></tr>
</table>
</table>
== Function ==
== Function ==
[[http://www.uniprot.org/uniprot/AMPC_ECOLI AMPC_ECOLI]] This protein is a serine beta-lactamase with a substrate specificity for cephalosporins.  
[https://www.uniprot.org/uniprot/AMPC_ECOLI AMPC_ECOLI] This protein is a serine beta-lactamase with a substrate specificity for cephalosporins.
== Evolutionary Conservation ==
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
[[Image:Consurf_key_small.gif|200px|right]]
Check<jmol>
Check<jmol>
   <jmolCheckbox>
   <jmolCheckbox>
     <scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/o0/1o07_consurf.spt"</scriptWhenChecked>
     <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/o0/1o07_consurf.spt"</scriptWhenChecked>
     <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
     <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
     <text>to colour the structure by Evolutionary Conservation</text>
     <text>to colour the structure by Evolutionary Conservation</text>
Line 19: Line 20:
</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=1o07 ConSurf].
</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=1o07 ConSurf].
<div style="clear:both"></div>
<div style="clear:both"></div>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Penicillin-binding proteins (PBPs), biosynthetic enzymes of bacterial cell wall assembly, and beta-lactamases, resistance enzymes to beta-lactam antibiotics, are related to each other from an evolutionary point of view. Massova and Mobashery (Antimicrob. Agents Chemother. 1998, 42, 1-17) have proposed that for beta-lactamases to have become effective at their function as antibiotic resistance enzymes, they would have had to undergo structure alterations such that they would not interact with the peptidoglycan, which is the substrate for PBPs. A cephalosporin analogue, 7beta-[N-Acetyl-L-alanyl-gamma-D-glutamyl-L-lysine]-3-acetoxymethyl-3-ceph em-carboxylic acid (compound 6), was conceived and synthesized to test this notion. The X-ray structure of the complex of this cephalosporin bound to the active site of the deacylation-deficient Q120L/Y150E variant of the class C AmpC beta-lactamase from Escherichia coli was solved at 1.71 A resolution. This complex revealed that the surface for interaction with the strand of peptidoglycan that acylates the active site, which is present in PBPs, is absent in the -lactamase active site. Furthermore, insertion of a peptide in the beta-lactamase active site at a location where the second strand of peptidoglycan in some PBPs binds has effectively abolished the possibility for such interaction with the beta-lactamase. A 2.6 ns dynamics simulation was carried out for the complex, which revealed that the peptidoglycan surrogate (i.e., the active-site-bound ligand) undergoes substantial motion and is not stabilized for binding within the active site. These factors taken together disclose the set of structure modifications in the antibiotic resistance enzyme that prevent it from interacting with the peptidoglycan, en route to achieving catalytic proficiency for their intended function.
Structural aspects for evolution of beta-lactamases from penicillin-binding proteins.,Meroueh SO, Minasov G, Lee W, Shoichet BK, Mobashery S J Am Chem Soc. 2003 Aug 13;125(32):9612-8. PMID:12904027<ref>PMID:12904027</ref>
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 1o07" style="background-color:#fffaf0;"></div>


==See Also==
==See Also==
*[[Beta-lactamase|Beta-lactamase]]
*[[Beta-lactamase 3D structures|Beta-lactamase 3D structures]]
== References ==
<references/>
__TOC__
__TOC__
</StructureSection>
</StructureSection>
[[Category: Bacillus coli migula 1895]]
[[Category: Escherichia coli]]
[[Category: Beta-lactamase]]
[[Category: Large Structures]]
[[Category: Lee, W]]
[[Category: Lee W]]
[[Category: Meroueh, S O]]
[[Category: Meroueh SO]]
[[Category: Minasov, G]]
[[Category: Minasov G]]
[[Category: Mobashery, S]]
[[Category: Mobashery S]]
[[Category: Shoichet, B K]]
[[Category: Shoichet BK]]
[[Category: Beta-lactamase beta-lactam complex]]
[[Category: Enzyme inhibitor complex]]
[[Category: Hydrolase]]

Latest revision as of 11:00, 14 February 2024

Crystal Structure of the complex between Q120L/Y150E mutant of AmpC and a beta-lactam inhibitor (MXG)Crystal Structure of the complex between Q120L/Y150E mutant of AmpC and a beta-lactam inhibitor (MXG)

Structural highlights

1o07 is a 2 chain structure with sequence from Escherichia coli. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:X-ray diffraction, Resolution 1.71Å
Ligands:,
Resources:FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

AMPC_ECOLI This protein is a serine beta-lactamase with a substrate specificity for cephalosporins.

Evolutionary Conservation

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

See Also

1o07, resolution 1.71Å

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