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2qia

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[[Image:2qia.gif|left|200px]]
 
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{{Structure
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==Structural basis for the acyl chain selectivity and mechanism of UDP-N-acetylglucosamine Acyltransferase==
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|PDB= 2qia |SIZE=350|CAPTION= <scene name='initialview01'>2qia</scene>, resolution 1.740&Aring;
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<StructureSection load='2qia' size='340' side='right'caption='[[2qia]], [[Resolution|resolution]] 1.74&Aring;' scene=''>
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|SITE=
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== Structural highlights ==
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|LIGAND= <scene name='pdbligand=U20:uridine-5&#39;-diphosphate-3-O-(R-3-hydroxymyristoyl)-N-acetyl-D-glucosamine'>U20</scene>
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<table><tr><td colspan='2'>[[2qia]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_coli_K-12 Escherichia coli K-12]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2QIA OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2QIA FirstGlance]. <br>
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|ACTIVITY= [http://en.wikipedia.org/wiki/Acyl-[acyl-carrier-protein]--UDP-N-acetylglucosamine_O-acyltransferase Acyl-[acyl-carrier-protein]--UDP-N-acetylglucosamine O-acyltransferase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.3.1.129 2.3.1.129]
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.74&#8491;</td></tr>
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|GENE= lpxa ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=562 Escherichia coli])
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=U20:URIDINE-5-DIPHOSPHATE-3-O-(R-3-HYDROXYMYRISTOYL)-N-ACETYL-D-GLUCOSAMINE'>U20</scene></td></tr>
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}}
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=2qia FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2qia OCA], [https://pdbe.org/2qia PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2qia RCSB], [https://www.ebi.ac.uk/pdbsum/2qia PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2qia ProSAT]</span></td></tr>
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</table>
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'''Structural basis for the acyl chain selectivity and mechanism of UDP-N-acetylglucosamine Acyltransferase'''
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== Function ==
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[https://www.uniprot.org/uniprot/LPXA_ECOLI LPXA_ECOLI] Involved in the biosynthesis of lipid A, a phosphorylated glycolipid that anchors the lipopolysaccharide to the outer membrane of the cell.[HAMAP-Rule:MF_00387]
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== Evolutionary Conservation ==
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==Overview==
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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/qi/2qia_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/main_output.php?pdb_ID=2qia 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 ==
UDP-N-acetylglucosamine (UDP-GlcNAc) acyltransferase (LpxA) catalyzes the first step of lipid A biosynthesis, the reversible transfer of the R-3-hydroxyacyl chain from R-3-hydroxyacyl acyl carrier protein to the glucosamine 3-OH group of UDP-GlcNAc. Escherichia coli LpxA is highly selective for R-3-hydroxymyristate. The crystal structure of the E. coli LpxA homotrimer, determined previously in the absence of lipid substrates or products, revealed that LpxA contains an unusual, left-handed parallel beta-helix fold. We have now solved the crystal structures of E. coli LpxA with the bound product UDP-3-O-(R-3-hydroxymyristoyl)-GlcNAc at a resolution of 1.74 A and with bound UDP-3-O-(R-3-hydroxydecanoyl)-GlcNAc at 1.85 A. The structures of these complexes are consistent with the catalytic mechanism deduced by mutagenesis and with a recent 3.0-A structure of LpxA with bound UDP-GlcNAc. Our structures show how LpxA selects for 14-carbon R-3-hydroxyacyl chains and reveal two modes of UDP binding.
UDP-N-acetylglucosamine (UDP-GlcNAc) acyltransferase (LpxA) catalyzes the first step of lipid A biosynthesis, the reversible transfer of the R-3-hydroxyacyl chain from R-3-hydroxyacyl acyl carrier protein to the glucosamine 3-OH group of UDP-GlcNAc. Escherichia coli LpxA is highly selective for R-3-hydroxymyristate. The crystal structure of the E. coli LpxA homotrimer, determined previously in the absence of lipid substrates or products, revealed that LpxA contains an unusual, left-handed parallel beta-helix fold. We have now solved the crystal structures of E. coli LpxA with the bound product UDP-3-O-(R-3-hydroxymyristoyl)-GlcNAc at a resolution of 1.74 A and with bound UDP-3-O-(R-3-hydroxydecanoyl)-GlcNAc at 1.85 A. The structures of these complexes are consistent with the catalytic mechanism deduced by mutagenesis and with a recent 3.0-A structure of LpxA with bound UDP-GlcNAc. Our structures show how LpxA selects for 14-carbon R-3-hydroxyacyl chains and reveal two modes of UDP binding.
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==About this Structure==
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Structural basis for the acyl chain selectivity and mechanism of UDP-N-acetylglucosamine acyltransferase.,Williams AH, Raetz CR Proc Natl Acad Sci U S A. 2007 Aug 21;104(34):13543-50. Epub 2007 Aug 13. PMID:17698807<ref>PMID:17698807</ref>
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2QIA is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2QIA OCA].
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==Reference==
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Structural basis for the acyl chain selectivity and mechanism of UDP-N-acetylglucosamine acyltransferase., Williams AH, Raetz CR, Proc Natl Acad Sci U S A. 2007 Aug 21;104(34):13543-50. Epub 2007 Aug 13. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/17698807 17698807]
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[[Category: Acyl-[acyl-carrier-protein]--UDP-N-acetylglucosamine O-acyltransferase]]
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[[Category: Escherichia coli]]
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[[Category: Single protein]]
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[[Category: Raetz, C R.H.]]
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[[Category: Williams, A H.]]
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[[Category: U20]]
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[[Category: left-handed parallel beta helix]]
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[[Category: transferase]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Mar 23 15:44:56 2008''
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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</div>
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<div class="pdbe-citations 2qia" style="background-color:#fffaf0;"></div>
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== References ==
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<references/>
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__TOC__
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</StructureSection>
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[[Category: Escherichia coli K-12]]
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[[Category: Large Structures]]
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[[Category: Raetz CRH]]
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[[Category: Williams AH]]

Current revision

Structural basis for the acyl chain selectivity and mechanism of UDP-N-acetylglucosamine Acyltransferase

PDB ID 2qia

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