1l6u

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(New page: 200px<br /><applet load="1l6u" size="450" color="white" frame="true" align="right" spinBox="true" caption="1l6u" /> '''NMR STRUCTURE OF OXIDIZED ADRENODOXIN'''<br ...)
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[[Image:1l6u.jpg|left|200px]]<br /><applet load="1l6u" size="450" color="white" frame="true" align="right" spinBox="true"
 
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caption="1l6u" />
 
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'''NMR STRUCTURE OF OXIDIZED ADRENODOXIN'''<br />
 
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==Overview==
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==NMR STRUCTURE OF OXIDIZED ADRENODOXIN==
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The adrenal ferredoxin (adrenodoxin, Adx) is an acidic 14.4-kDa [2Fe-2S], ferredoxin that belongs to the vertebrate ferredoxin family. It is, involved in the electron transfer from the flavoenzyme, NADPH-adrenodoxin-reductase to cytochromes P-450(scc) and P-450(11)(beta)., The interaction between the redox partners during electron transport has, not yet been fully established. Determining the tertiary structure of an, electron-transfer protein may be very helpful in understanding the, transport mechanism. In the present work, we report a structural study on, the oxidized and reduced forms of bovine adrenodoxin (bAdx) in solution, using high-resolution NMR spectroscopy. The protein was produced in, Escherichia coli and singly or doubly labeled with (15)N or (13)C/(15)N, respectively. Approximately 70 and 75% of the (15)N, (13)C, and (1)H, resonances could be assigned for the reduced and the oxidized bAdx, respectively. The secondary and tertiary structures of the reduced and, oxidized states were determined using NOE distance information., (1)H(N)-T(1) relaxation times of certain residues were used to obtain, additional distance constraints to the [2Fe-2S] cluster. The results, suggest that the solution structure of oxidized Adx is quite similar to, the X-ray structure. However, structural changes occur upon reduction of, the [2Fe-2S] cluster, as indicated by NMR measurements. It could be shown, that these conformational changes, especially in the C-terminal region, cause the dissociation of the Adx dimer upon reduction. A new electron, transport mechanism proceeding via a modified shuttle mechanism, with both, monomers and dimers acting as electron carriers, is proposed.
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<StructureSection load='1l6u' size='340' side='right'caption='[[1l6u]]' scene=''>
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== Structural highlights ==
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<table><tr><td colspan='2'>[[1l6u]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Bos_taurus Bos taurus]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1L6U OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1L6U FirstGlance]. <br>
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Solution NMR, 10 models</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=FES:FE2/S2+(INORGANIC)+CLUSTER'>FES</scene></td></tr>
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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=1l6u FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1l6u OCA], [https://pdbe.org/1l6u PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1l6u RCSB], [https://www.ebi.ac.uk/pdbsum/1l6u PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1l6u ProSAT]</span></td></tr>
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/ADX_BOVIN ADX_BOVIN] Essential for the synthesis of various steroid hormones, participates in the reduction of mitochondrial cytochrome P450 for steroidogenesis. Transfers electrons from adrenodoxin reductase to cytochrome P450 cholesterol side-chain cleavage enzyme. reductase to the cholesterol side chain cleavage cytochrome P450 (By similarity).
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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/l6/1l6u_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=1l6u 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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The adrenal ferredoxin (adrenodoxin, Adx) is an acidic 14.4-kDa [2Fe-2S] ferredoxin that belongs to the vertebrate ferredoxin family. It is involved in the electron transfer from the flavoenzyme NADPH-adrenodoxin-reductase to cytochromes P-450(scc) and P-450(11)(beta). The interaction between the redox partners during electron transport has not yet been fully established. Determining the tertiary structure of an electron-transfer protein may be very helpful in understanding the transport mechanism. In the present work, we report a structural study on the oxidized and reduced forms of bovine adrenodoxin (bAdx) in solution using high-resolution NMR spectroscopy. The protein was produced in Escherichia coli and singly or doubly labeled with (15)N or (13)C/(15)N, respectively. Approximately 70 and 75% of the (15)N, (13)C, and (1)H resonances could be assigned for the reduced and the oxidized bAdx, respectively. The secondary and tertiary structures of the reduced and oxidized states were determined using NOE distance information. (1)H(N)-T(1) relaxation times of certain residues were used to obtain additional distance constraints to the [2Fe-2S] cluster. The results suggest that the solution structure of oxidized Adx is quite similar to the X-ray structure. However, structural changes occur upon reduction of the [2Fe-2S] cluster, as indicated by NMR measurements. It could be shown that these conformational changes, especially in the C-terminal region, cause the dissociation of the Adx dimer upon reduction. A new electron transport mechanism proceeding via a modified shuttle mechanism, with both monomers and dimers acting as electron carriers, is proposed.
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==About this Structure==
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A new electron transport mechanism in mitochondrial steroid hydroxylase systems based on structural changes upon the reduction of adrenodoxin.,Beilke D, Weiss R, Lohr F, Pristovsek P, Hannemann F, Bernhardt R, Ruterjans H Biochemistry. 2002 Jun 25;41(25):7969-78. PMID:12069587<ref>PMID:12069587</ref>
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1L6U is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Bos_taurus Bos taurus] with FES as [http://en.wikipedia.org/wiki/ligand ligand]. Full crystallographic information is available from [http://ispc.weizmann.ac.il/oca-bin/ocashort?id=1L6U OCA].
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==Reference==
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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A new electron transport mechanism in mitochondrial steroid hydroxylase systems based on structural changes upon the reduction of adrenodoxin., Beilke D, Weiss R, Lohr F, Pristovsek P, Hannemann F, Bernhardt R, Ruterjans H, Biochemistry. 2002 Jun 25;41(25):7969-78. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=12069587 12069587]
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</div>
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[[Category: Bos taurus]]
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<div class="pdbe-citations 1l6u" style="background-color:#fffaf0;"></div>
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[[Category: Single protein]]
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[[Category: Beilke, D.]]
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[[Category: Bernhardt, R.]]
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[[Category: Hannemann, F.]]
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[[Category: Lohr, F.]]
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[[Category: Pristovsek, P.]]
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[[Category: Rueterjans, H.]]
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[[Category: Weiss, R.]]
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[[Category: FES]]
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[[Category: (alpha-beta)-protein]]
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[[Category: 5 beta strands]]
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[[Category: 5 helices]]
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[[Category: [2fe-2s]-cluster]]
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[[Category: primary interaction domain (helix from asp72-asp79)]]
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''Page seeded by [http://ispc.weizmann.ac.il/oca OCA ] on Tue Nov 20 20:19:32 2007''
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==See Also==
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*[[Ferredoxin 3D structures|Ferredoxin 3D structures]]
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== References ==
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<references/>
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__TOC__
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</StructureSection>
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[[Category: Bos taurus]]
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[[Category: Large Structures]]
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[[Category: Beilke D]]
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[[Category: Bernhardt R]]
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[[Category: Hannemann F]]
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[[Category: Lohr F]]
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[[Category: Pristovsek P]]
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[[Category: Rueterjans H]]
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[[Category: Weiss R]]

Current revision

NMR STRUCTURE OF OXIDIZED ADRENODOXIN

PDB ID 1l6u

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