1e4e

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{{STRUCTURE_1e4e| PDB=1e4e | SCENE= }}
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==D-ALANYL-D-LACATE LIGASE==
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===D-ALANYL-D-LACATE LIGASE===
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<StructureSection load='1e4e' size='340' side='right' caption='[[1e4e]], [[Resolution|resolution]] 2.50&Aring;' scene=''>
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{{ABSTRACT_PUBMED_10908650}}
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== Structural highlights ==
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<table><tr><td colspan='2'>[[1e4e]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Enterococcus_faecium Enterococcus faecium]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1E4E OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1E4E FirstGlance]. <br>
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</td></tr><tr><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=ADP:ADENOSINE-5-DIPHOSPHATE'>ADP</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=PHY:1(S)-AMINOETHYL-(2-CARBOXYPROPYL)PHOSPHORYL-PHOSPHINIC+ACID'>PHY</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene><br>
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<tr><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1iow|1iow]], [[1iov|1iov]]</td></tr>
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<tr><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">VANA ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=1352 Enterococcus faecium])</td></tr>
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<tr><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/D-alanine--(R)-lactate_ligase D-alanine--(R)-lactate ligase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=6.1.2.1 6.1.2.1] </span></td></tr>
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<tr><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1e4e FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1e4e OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1e4e RCSB], [http://www.ebi.ac.uk/pdbsum/1e4e PDBsum]</span></td></tr>
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<table>
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== Evolutionary Conservation ==
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[[Image:Consurf_key_small.gif|200px|right]]
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Check<jmol>
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<jmolCheckbox>
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<scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/e4/1e4e_consurf.spt"</scriptWhenChecked>
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
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<text>to colour the structure by Evolutionary Conservation</text>
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</jmolCheckbox>
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</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/chain_selection.php?pdb_ID=2ata ConSurf].
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<div style="clear:both"></div>
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<div style="background-color:#fffaf0;">
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== Publication Abstract from PubMed ==
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d-alanine-d-lactate ligase from Enterococcus faecium BM4147 is directly responsible for the biosynthesis of alternate cell-wall precursors in bacteria, which are resistant to the glycopeptide antibiotic vancomycin. The crystal structure has been determined with data extending to 2.5-A resolution. This structure shows that the active site has unexpected interactions and is distinct from previous models for d-alanyl-d-lactate ligase mechanistic studies. It appears that the preference of the enzyme for lactate as a ligand over d-alanine could be mediated by electrostatic effects and/or a hydrogen-bonding network, which principally involve His-244. The structure of d-alanyl-d-lactate ligase provides a revised interpretation of the molecular events that lead to vancomycin resistance.
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==Function==
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The molecular basis of vancomycin resistance in clinically relevant Enterococci: crystal structure of D-alanyl-D-lactate ligase (VanA).,Roper DI, Huyton T, Vagin A, Dodson G Proc Natl Acad Sci U S A. 2000 Aug 1;97(16):8921-5. PMID:10908650<ref>PMID:10908650</ref>
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[[http://www.uniprot.org/uniprot/VANA_ENTFC VANA_ENTFC]] Required for high-level resistance to glycopeptide antibiotics. D-Ala--D-Ala ligase of altered specificity which catalyzes ester bond formation between D-Ala and various D-hydroxy acids; produces a peptidoglycan which does not terminate in D-alanine but in D-lactate, thus preventing vancomycin or teicoplanin binding.<ref>PMID:1931965</ref>
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==About this Structure==
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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[[1e4e]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Enterococcus_faecium Enterococcus faecium]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1E4E OCA].
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</div>
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== References ==
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==Reference==
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<references/>
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<ref group="xtra">PMID:010908650</ref><references group="xtra"/><references/>
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__TOC__
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</StructureSection>
[[Category: Enterococcus faecium]]
[[Category: Enterococcus faecium]]
[[Category: Roper, D I.]]
[[Category: Roper, D I.]]

Revision as of 10:29, 3 October 2014

D-ALANYL-D-LACATE LIGASE

1e4e, resolution 2.50Å

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