View source for 1uzn


==MabA from Mycobacterium tuberculosis==
<StructureSection load='1uzn' size='340' side='right'caption='[[1uzn]], [[Resolution|resolution]] 1.91&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[1uzn]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Mycobacterium_tuberculosis_H37Rv Mycobacterium tuberculosis H37Rv]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1UZN OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1UZN 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]] 1.91&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CS:CESIUM+ION'>CS</scene>, <scene name='pdbligand=NAP:NADP+NICOTINAMIDE-ADENINE-DINUCLEOTIDE+PHOSPHATE'>NAP</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=1uzn FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1uzn OCA], [https://pdbe.org/1uzn PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1uzn RCSB], [https://www.ebi.ac.uk/pdbsum/1uzn PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1uzn ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/MABA_MYCTU MABA_MYCTU] Part of the mycobacterial fatty acid elongation system FAS-II, which is involved in mycolic acid biosynthesis (PubMed:11932442). Catalyzes the NADPH-dependent reduction of beta-ketoacyl derivatives, the second step of the FAS-II elongation cycle (PubMed:9802011, PubMed:11932442, PubMed:17059223, PubMed:18155153, PubMed:19685079). May preferentially metabolize long-chain substrates (C8-C20) (PubMed:11932442). Can use CoA derivatives as substrates in vitro (PubMed:9802011, PubMed:11932442, PubMed:17059223, PubMed:18155153).<ref>PMID:11932442</ref> <ref>PMID:17059223</ref> <ref>PMID:18155153</ref> <ref>PMID:19685079</ref> <ref>PMID:9802011</ref> 
== 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/uz/1uzn_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.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=1uzn ConSurf].
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== Publication Abstract from PubMed ==
The fatty acid elongation system FAS-II is involved in the biosynthesis of mycolic acids, which are major and specific long-chain fatty acids of the cell envelope of Mycobacterium tuberculosis and other mycobacteria, including Mycobacterium smegmatis. The protein MabA, also named FabG1, has been shown recently to be part of FAS-II and to catalyse the NADPH-specific reduction of long chain beta-ketoacyl derivatives. This activity corresponds to the second step of an FAS-II elongation round. FAS-II is inhibited by the antituberculous drug isoniazid through the inhibition of the 2-trans-enoyl-acyl carrier protein reductase InhA. Thus, the other enzymes making up this enzymatic complex represent potential targets for designing new antituberculous drugs. The crystal structure of the apo-form MabA was solved to 2.03 A resolution by molecular replacement. MabA is tetrameric and shares the conserved fold of the short-chain dehydrogenases/reductases (SDRs). However, it exhibits some significant local rearrangements of the active-site loops in the absence of a cofactor, particularly the beta5-alpha5 region carrying the unique tryptophan residue, in agreement with previous fluorescence spectroscopy data. A similar conformation has been observed in the beta-ketoacyl reductase from Escherichia coli and the distantly related dehydratase. The distinctive enzymatic and structural properties of MabA are discussed in view of its crystal structure and that of related enzymes.

Crystal structure of MabA from Mycobacterium tuberculosis, a reductase involved in long-chain fatty acid biosynthesis.,Cohen-Gonsaud M, Ducasse S, Hoh F, Zerbib D, Labesse G, Quemard A J Mol Biol. 2002 Jul 5;320(2):249-61. PMID:12079383<ref>PMID:12079383</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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==See Also==
*[[Beta-ketoacyl carrier protein reductase 3D structures|Beta-ketoacyl carrier protein reductase 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Mycobacterium tuberculosis H37Rv]]
[[Category: Cohen-Gonsaud M]]
[[Category: Ducasse S]]
[[Category: Labesse G]]
[[Category: Quemard A]]