2ba9

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[[Image:2ba9.gif|left|200px]]<br /><applet load="2ba9" size="350" color="white" frame="true" align="right" spinBox="true"
 
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caption="2ba9, resolution 1.95&Aring;" />
 
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'''Crystal structure of CLA-producing fatty acid isomerase from P. acnes'''<br />
 
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==Overview==
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==Crystal structure of CLA-producing fatty acid isomerase from P. acnes==
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Conjugated linoleic acids (CLAs) affect body fat gain, carcinogenesis, insulin resistance, and lipid peroxidation in mammals. Several isomers of CLA exist, of which the (9Z, 11E) and (10E, 12Z) isomers have beneficial effects on human metabolism but are scarce in foods. Bacterial polyunsaturated fatty acid isomerases are promising biotechnological catalysts for CLA production. We describe six crystal structures of the Propionibacterium acnes polyunsaturated fatty acid isomerase PAI in apo- and product-bound forms. The three-domain flavoprotein has previously undescribed folds outside the FAD-binding site. Conformational changes in a hydrophobic channel toward the active site reveal a unique gating mechanism for substrate specificity. The geometry of the substrate-binding site explains the length preferences for C18 fatty acids. A catalytic mechanism for double-bond isomerization is formulated that may be altered to change substrate specificity for syntheses of rare CLAs from easily accessible precursors.
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<StructureSection load='2ba9' size='340' side='right'caption='[[2ba9]], [[Resolution|resolution]] 1.95&Aring;' scene=''>
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== Structural highlights ==
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==About this Structure==
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<table><tr><td colspan='2'>[[2ba9]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Cutibacterium_acnes Cutibacterium acnes]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2BA9 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2BA9 FirstGlance]. <br>
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2BA9 is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Propionibacterium_acnes Propionibacterium acnes] with <scene name='pdbligand=NA:'>NA</scene>, <scene name='pdbligand=FAD:'>FAD</scene> and <scene name='pdbligand=12P:'>12P</scene> as [http://en.wikipedia.org/wiki/ligands ligands]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2BA9 OCA].
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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]] 1.95&#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=12P:DODECAETHYLENE+GLYCOL'>12P</scene>, <scene name='pdbligand=FAD:FLAVIN-ADENINE+DINUCLEOTIDE'>FAD</scene>, <scene name='pdbligand=NA:SODIUM+ION'>NA</scene></td></tr>
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==Reference==
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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=2ba9 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2ba9 OCA], [https://pdbe.org/2ba9 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2ba9 RCSB], [https://www.ebi.ac.uk/pdbsum/2ba9 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2ba9 ProSAT]</span></td></tr>
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Structure and mechanism of the Propionibacterium acnes polyunsaturated fatty acid isomerase., Liavonchanka A, Hornung E, Feussner I, Rudolph MG, Proc Natl Acad Sci U S A. 2006 Feb 21;103(8):2576-81. Epub 2006 Feb 13. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=16477020 16477020]
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</table>
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[[Category: Propionibacterium acnes]]
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== Function ==
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[[Category: Single protein]]
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[https://www.uniprot.org/uniprot/Q6A8X5_CUTAK Q6A8X5_CUTAK]
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[[Category: Liavonchanka, A.]]
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== Evolutionary Conservation ==
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[[Category: Rudoplh, M G.]]
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[[Image:Consurf_key_small.gif|200px|right]]
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[[Category: 12P]]
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Check<jmol>
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[[Category: FAD]]
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<jmolCheckbox>
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[[Category: NA]]
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<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/ba/2ba9_consurf.spt"</scriptWhenChecked>
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[[Category: conjugated linoleic acid]]
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
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[[Category: fad]]
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<text>to colour the structure by Evolutionary Conservation</text>
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[[Category: isomerase]]
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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=2ba9 ConSurf].
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 16:35:40 2008''
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<div style="clear:both"></div>
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__TOC__
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</StructureSection>
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[[Category: Cutibacterium acnes]]
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[[Category: Large Structures]]
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[[Category: Liavonchanka A]]
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[[Category: Rudoplh MG]]

Current revision

Crystal structure of CLA-producing fatty acid isomerase from P. acnes

PDB ID 2ba9

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