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| [[Image:1yve.jpg|left|200px]]
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| {{Structure
| | ==ACETOHYDROXY ACID ISOMEROREDUCTASE COMPLEXED WITH NADPH, MAGNESIUM AND INHIBITOR IPOHA (N-HYDROXY-N-ISOPROPYLOXAMATE)== |
| |PDB= 1yve |SIZE=350|CAPTION= <scene name='initialview01'>1yve</scene>, resolution 1.65Å
| | <StructureSection load='1yve' size='340' side='right'caption='[[1yve]], [[Resolution|resolution]] 1.65Å' scene=''> |
| |SITE= | | == Structural highlights == |
| |LIGAND= <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=NDP:NADPH+DIHYDRO-NICOTINAMIDE-ADENINE-DINUCLEOTIDE+PHOSPHATE'>NDP</scene> and <scene name='pdbligand=HIO:N-HYDROXY-N-ISOPROPYLOXAMIC ACID'>HIO</scene>
| | <table><tr><td colspan='2'>[[1yve]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Spinacia_oleracea Spinacia oleracea]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1YVE OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1YVE FirstGlance]. <br> |
| |ACTIVITY= [http://en.wikipedia.org/wiki/Ketol-acid_reductoisomerase Ketol-acid reductoisomerase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.1.1.86 1.1.1.86]
| | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.65Å</td></tr> |
| |GENE= CDNA FROM ACETOHYDROXY ACID ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=3562 Spinacia oleracea]) | | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=HIO:N-HYDROXY-N-ISOPROPYLOXAMIC+ACID'>HIO</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=NDP:NADPH+DIHYDRO-NICOTINAMIDE-ADENINE-DINUCLEOTIDE+PHOSPHATE'>NDP</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=1yve FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1yve OCA], [https://pdbe.org/1yve PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1yve RCSB], [https://www.ebi.ac.uk/pdbsum/1yve PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1yve ProSAT]</span></td></tr> |
| | </table> |
| | == Function == |
| | [https://www.uniprot.org/uniprot/ILV5_SPIOL ILV5_SPIOL] |
| | == 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/yv/1yve_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=1yve ConSurf]. |
| | <div style="clear:both"></div> |
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| '''ACETOHYDROXY ACID ISOMEROREDUCTASE COMPLEXED WITH NADPH, MAGNESIUM AND INHIBITOR IPOHA (N-HYDROXY-N-ISOPROPYLOXAMATE)'''
| | ==See Also== |
| | | *[[Ketol-acid reductoisomerase 3D structures|Ketol-acid reductoisomerase 3D structures]] |
| | | __TOC__ |
| ==Overview==
| | </StructureSection> |
| Acetohydroxy acid isomeroreductase catalyzes the conversion of acetohydroxy acids into dihydroxy valerates. This reaction is the second in the synthetic pathway of the essential branched side chain amino acids valine and isoleucine. Because this pathway is absent from animals, the enzymes involved in it are good targets for a systematic search for herbicides. The crystal structure of acetohydroxy acid isomeroreductase complexed with cofactor NADPH, Mg2+ ions and a competitive inhibitor with herbicidal activity, N-hydroxy-N-isopropyloxamate, was solved to 1.65 A resolution and refined to an R factor of 18.7% and an R free of 22.9%. The asymmetric unit shows two functional dimers related by non-crystallographic symmetry. The active site, nested at the interface between the NADPH-binding domain and the all-helical C-terminus domain, shows a situation analogous to the transition state. It contains two Mg2+ ions interacting with the inhibitor molecule and bridged by the carboxylate moiety of an aspartate residue. The inhibitor-binding site is well adjusted to it, with a hydrophobic pocket and a polar region. Only 24 amino acids are conserved among known acetohydroxy acid isomeroreductase sequences and all of these are located around the active site. Finally, a 140 amino acid region, present in plants but absent from other species, was found to make up most of the dimerization domain.
| | [[Category: Large Structures]] |
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| ==About this Structure== | |
| 1YVE is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Spinacia_oleracea Spinacia oleracea]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1YVE OCA].
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| ==Reference==
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| The crystal structure of plant acetohydroxy acid isomeroreductase complexed with NADPH, two magnesium ions and a herbicidal transition state analog determined at 1.65 A resolution., Biou V, Dumas R, Cohen-Addad C, Douce R, Job D, Pebay-Peyroula E, EMBO J. 1997 Jun 16;16(12):3405-15. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/9218783 9218783]
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| [[Category: Ketol-acid reductoisomerase]]
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| [[Category: Single protein]] | |
| [[Category: Spinacia oleracea]] | | [[Category: Spinacia oleracea]] |
| [[Category: Biou, V.]] | | [[Category: Biou V]] |
| [[Category: Cohen-Addad, C.]] | | [[Category: Cohen-Addad C]] |
| [[Category: Douce, R.]] | | [[Category: Douce R]] |
| [[Category: Dumas, R.]] | | [[Category: Dumas R]] |
| [[Category: Job, D.]] | | [[Category: Job D]] |
| [[Category: Pebay-Peyroula, E.]] | | [[Category: Pebay-Peyroula E]] |
| [[Category: CL]]
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| [[Category: HIO]]
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| [[Category: MG]]
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| [[Category: NDP]]
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| [[Category: branched-chain amino acid biosynthesis]]
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| [[Category: chloroplast]]
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| [[Category: magnesium]]
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| [[Category: nadp]]
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| [[Category: oxidoreductase]]
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| [[Category: transit peptide]]
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| ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 15:27:58 2008''
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