View source for 1ejc


==Crystal structure of unliganded mura (type2)==
<StructureSection load='1ejc' size='340' side='right'caption='[[1ejc]], [[Resolution|resolution]] 1.80&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[1ejc]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Enterobacter_cloacae Enterobacter cloacae]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1EJC OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1EJC 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]] 1.8&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=IAS:BETA-L-ASPARTIC+ACID'>IAS</scene>, <scene name='pdbligand=PO4:PHOSPHATE+ION'>PO4</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=1ejc FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1ejc OCA], [https://pdbe.org/1ejc PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1ejc RCSB], [https://www.ebi.ac.uk/pdbsum/1ejc PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1ejc ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/MURA_ENTCC MURA_ENTCC] Cell wall formation. Adds enolpyruvyl to UDP-N-acetylglucosamine. Target for the antibiotic phosphomycin.
== 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/ej/1ejc_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview03.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=1ejc ConSurf].
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== Publication Abstract from PubMed ==
MurA, an essential enzyme for the synthesis of the bacterial cell wall, follows an induced-fit mechanism. Upon substrate binding, the active site forms in the interdomain cleft, involving movements of the two domains of the protein and a reorientation of the loop Pro112-Pro121. We compare two structures of un-liganded MurA from Enterobacter cloacae: a new orthorhombic form, solved to 1.80 A resolution, and a monoclinic form, redetermined to 1.55 A resolution. In the monoclinic form, the loop Pro112-Pro121 stretches into solvent, while in the new form it adopts a winded conformation, thereby reducing solvent accessibility of the critical residue Cys115. In the interdomain cleft a network of 27 common water molecules has been identified, which partially shields negative charges in the cleft and stabilizes the orientation of catalytically crucial residues. This could support substrate binding and ease domain movements. Near the hinge region an isoaspartyl residue has been recognized, which is the product of post-translational modification of the genetically encoded Asn67-Gly68. The homogeneous population with L-isoaspartate in both structures suggests that the modification in Enterobacter cloacae MurA is not a mere aging defect but rather the result of a specific in vivo process.

Comparative X-ray analysis of the un-liganded fosfomycin-target murA.,Eschenburg S, Schonbrunn E Proteins. 2000 Aug 1;40(2):290-8. PMID:10842342<ref>PMID:10842342</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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<div class="pdbe-citations 1ejc" style="background-color:#fffaf0;"></div>

==See Also==
*[[Enoylpyruvate transferase 3D structures|Enoylpyruvate transferase 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Enterobacter cloacae]]
[[Category: Large Structures]]
[[Category: Eschenburg S]]
[[Category: Schonbrunn E]]