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1rov

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(New page: 200px<br /><applet load="1rov" size="450" color="white" frame="true" align="right" spinBox="true" caption="1rov, resolution 2.00&Aring;" /> '''Lipoxygenase-3 Treat...)
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[[Image:1rov.gif|left|200px]]<br /><applet load="1rov" size="450" color="white" frame="true" align="right" spinBox="true"
 
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caption="1rov, resolution 2.00&Aring;" />
 
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'''Lipoxygenase-3 Treated with Cumene Hydroperoxide'''<br />
 
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==Overview==
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==Lipoxygenase-3 Treated with Cumene Hydroperoxide==
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Lipoxygenase catalysis depends in a critical fashion on the redox, properties of a unique mononuclear non-heme iron cofactor. The isolated, enzyme contains predominantly, if not exclusively, iron(II), but the, catalytically active form of the enzyme has iron(III). The activating, oxidation of the iron takes place in a reaction with the hydroperoxide, product of the catalyzed reaction. In a second peroxide-dependent process, lipoxygenases are also inactivated. To examine the redox, activation/inactivation dichotomy in lipoxygenase chemistry, the, interaction between lipoxygenase-1 (and -3) and cumene hydroperoxide was, investigated. Cumene hydroperoxide was a reversible inhibitor of the, reaction catalyzed by lipoxygenase-1 under standard assay conditions at, high substrate concentrations. Reconciliation of the data with the, currently held kinetic mechanism requires simultaneous binding of, substrate and peroxide. The enzyme also was both oxidized and largely, inactivated in a reaction with the peroxide in the absence of substrate., The consequences of this reaction for the enzyme included the, hydroxylation at C beta of two amino acid side chains in the vicinity of, the cofactor, Trp and Leu. The modifications were identified by mass, spectrometry and X-ray crystallography. The peroxide-induced oxidation of, iron was also accompanied by a subtle rearrangement in the coordination, sphere of the non-heme iron atom. Since the enzyme retains catalytic, activity, albeit diminished, after treatment with cumene hydroperoxide, the structure of the iron site may reflect the catalytically relevant form, of the cofactor.
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<StructureSection load='1rov' size='340' side='right'caption='[[1rov]], [[Resolution|resolution]] 2.00&Aring;' scene=''>
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== Structural highlights ==
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==About this Structure==
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<table><tr><td colspan='2'>[[1rov]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Glycine_max Glycine max]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1ROV OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1ROV FirstGlance]. <br>
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1ROV is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Glycine_max Glycine max] with FE as [http://en.wikipedia.org/wiki/ligand ligand]. Active as [http://en.wikipedia.org/wiki/Lipoxygenase Lipoxygenase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.13.11.12 1.13.11.12] Full crystallographic information is available from [http://ispc.weizmann.ac.il/oca-bin/ocashort?id=1ROV 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]] 2&#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=FE:FE+(III)+ION'>FE</scene>, <scene name='pdbligand=HLU:BETA-HYDROXYLEUCINE'>HLU</scene>, <scene name='pdbligand=HTR:BETA-HYDROXYTRYPTOPHANE'>HTR</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=1rov FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1rov OCA], [https://pdbe.org/1rov PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1rov RCSB], [https://www.ebi.ac.uk/pdbsum/1rov PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1rov ProSAT]</span></td></tr>
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Interaction between non-heme iron of lipoxygenases and cumene hydroperoxide: basis for enzyme activation, inactivation, and inhibition., Vahedi-Faridi A, Brault PA, Shah P, Kim YW, Dunham WR, Funk MO Jr, J Am Chem Soc. 2004 Feb 25;126(7):2006-15. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=14971933 14971933]
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/LOX3_SOYBN LOX3_SOYBN] Plant lipoxygenase may be involved in a number of diverse aspects of plant physiology including growth and development, pest resistance, and senescence or responses to wounding. It catalyzes the hydroperoxidation of lipids containing a cis,cis-1,4-pentadiene structure.
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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/ro/1rov_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=1rov ConSurf].
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<div style="clear:both"></div>
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__TOC__
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</StructureSection>
[[Category: Glycine max]]
[[Category: Glycine max]]
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[[Category: Lipoxygenase]]
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[[Category: Large Structures]]
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[[Category: Single protein]]
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[[Category: Brault PA]]
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[[Category: Brault, P.A.]]
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[[Category: Dunham WR]]
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[[Category: Dunham, W.R.]]
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[[Category: Funk MO]]
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[[Category: Funk, M.O.]]
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[[Category: Kim YW]]
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[[Category: Kim, Y.W.]]
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[[Category: Shah P]]
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[[Category: Shah, P.]]
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[[Category: Vahedi-Faridi A]]
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[[Category: Vahedi-Faridi, A.]]
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[[Category: FE]]
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[[Category: beta hydroxylation]]
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''Page seeded by [http://ispc.weizmann.ac.il/oca OCA ] on Wed Nov 21 01:45:33 2007''
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Current revision

Lipoxygenase-3 Treated with Cumene Hydroperoxide

PDB ID 1rov

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