2qnx

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[[Image:2qnx.png|left|200px]]
 
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==Crystal structure of the complex between the mycobacterium beta-ketoacyl-acyl carrier protein synthase III (FABH) and 11-[(decyloxycarbonyl)dithio]-undecanoic acid==
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The line below this paragraph, containing "STRUCTURE_2qnx", creates the "Structure Box" on the page.
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<StructureSection load='2qnx' size='340' side='right'caption='[[2qnx]], [[Resolution|resolution]] 2.70&Aring;' scene=''>
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You may change the PDB parameter (which sets the PDB file loaded into the applet)
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== Structural highlights ==
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or the SCENE parameter (which sets the initial scene displayed when the page is loaded),
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<table><tr><td colspan='2'>[[2qnx]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Mycobacterium_tuberculosis Mycobacterium tuberculosis]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2QNX OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2QNX FirstGlance]. <br>
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or leave the SCENE parameter empty for the default display.
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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]] 2.7&#8491;</td></tr>
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=MDX:11-MERCAPTOUNDECANOIC+ACID'>MDX</scene>, <scene name='pdbligand=UDT:O-DECYL+HYDROGEN+THIOCARBONATE'>UDT</scene></td></tr>
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{{STRUCTURE_2qnx| PDB=2qnx | SCENE= }}
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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=2qnx FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2qnx OCA], [https://pdbe.org/2qnx PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2qnx RCSB], [https://www.ebi.ac.uk/pdbsum/2qnx PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2qnx ProSAT]</span></td></tr>
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/FABH_MYCTU FABH_MYCTU] Catalyzes the condensation reaction of fatty acid synthesis by the addition to an acyl acceptor of two carbons from malonyl-ACP. Catalyzes the first condensation reaction which initiates fatty acid synthesis and may therefore play a role in governing the total rate of fatty acid production. Possesses both acetoacetyl-ACP synthase and acetyl transacylase activities. Has some substrate specificity for long chain acyl-CoA such as myristoyl-CoA. Does not use acyl-CoA as primer. Its substrate specificity determines the biosynthesis of mycolic acid fatty acid chain, which is characteristic of mycobacterial cell wall.<ref>PMID:10840036</ref>
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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/qn/2qnx_consurf.spt"</scriptWhenChecked>
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview03.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=2qnx 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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Mycobacterium tuberculosis FabH initiates type II fatty acid synthase-catalyzed formation of the long chain (C(16)-C(22)) acyl-coenzyme A (CoA) precursors of mycolic acids, which are major constituents of the bacterial cell envelope. Crystal structures of M. tuberculosis FabH (mtFabH) show the substrate binding site to be a buried, extended L-shaped channel with only a single solvent access portal. Entrance of an acyl-CoA substrate through the solvent portal would require energetically unfavorable reptational threading of the substrate to its reactive position. Using a class of FabH inhibitors, we have tested an alternative hypothesis that FabH exists in an "open" form during substrate binding and product release, and a "closed" form in which catalysis and intermediate steps occur. This hypothesis is supported by mass spectrometric analysis of the product profile and crystal structures of complexes of mtFabH with these inhibitors.
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===Crystal structure of the complex between the mycobacterium beta-ketoacyl-acyl carrier protein synthase III (FABH) and 11-[(decyloxycarbonyl)dithio]-undecanoic acid===
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Separate entrance and exit portals for ligand traffic in Mycobacterium tuberculosis FabH.,Sachdeva S, Musayev FN, Alhamadsheh MM, Scarsdale JN, Wright HT, Reynolds KA Chem Biol. 2008 Apr;15(4):402-12. PMID:18420147<ref>PMID:18420147</ref>
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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 2qnx" style="background-color:#fffaf0;"></div>
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==See Also==
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The line below this paragraph, {{ABSTRACT_PUBMED_18420147}}, adds the Publication Abstract to the page
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*[[Acyl carrier protein synthase 3D structures|Acyl carrier protein synthase 3D structures]]
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(as it appears on PubMed at http://www.pubmed.gov), where 18420147 is the PubMed ID number.
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== References ==
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<references/>
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{{ABSTRACT_PUBMED_18420147}}
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__TOC__
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</StructureSection>
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==About this Structure==
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[[Category: Large Structures]]
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[[2qnx]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Mycobacterium_tuberculosis Mycobacterium tuberculosis]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2QNX OCA].
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==Reference==
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<ref group="xtra">PMID:18420147</ref><ref group="xtra">PMID:11278743</ref><ref group="xtra">PMID:15713483</ref><references group="xtra"/>
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[[Category: Beta-ketoacyl-acyl-carrier-protein synthase I]]
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[[Category: Mycobacterium tuberculosis]]
[[Category: Mycobacterium tuberculosis]]
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[[Category: Alhamadsheh, M.]]
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[[Category: Alhamadsheh M]]
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[[Category: Musayev, F.]]
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[[Category: Musayev F]]
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[[Category: Reynolds, K A.]]
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[[Category: Reynolds KA]]
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[[Category: Sachdeva, S.]]
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[[Category: Sachdeva S]]
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[[Category: Scarsdale, J N.]]
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[[Category: Scarsdale JN]]
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[[Category: Wright, H T.]]
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[[Category: Wright HT]]
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[[Category: Acyltransferase]]
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[[Category: Cytoplasm]]
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[[Category: Enzyme inhibitor complex]]
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[[Category: Fatty acid biosynthesis]]
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[[Category: Lipid synthesis]]
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[[Category: Mechanism based inhibitor]]
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[[Category: Multifunctional enzyme]]
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[[Category: Myobacterium tuberculosis]]
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[[Category: Structural basis for substrate specificity]]
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[[Category: Transferase]]
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Current revision

Crystal structure of the complex between the mycobacterium beta-ketoacyl-acyl carrier protein synthase III (FABH) and 11-[(decyloxycarbonyl)dithio]-undecanoic acid

PDB ID 2qnx

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