1h1l

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[[Image:1h1l.jpg|left|200px]]<br /><applet load="1h1l" size="450" color="white" frame="true" align="right" spinBox="true"
 
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caption="1h1l, resolution 1.90&Aring;" />
 
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'''NITROGENASE MO-FE PROTEIN FROM KLEBSIELLA PNEUMONIAE, NIFV MUTANT'''<br />
 
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==Overview==
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==NITROGENASE MO-FE PROTEIN FROM KLEBSIELLA PNEUMONIAE, NIFV MUTANT==
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The x-ray crystal structure of NifV(-) Klebsiella pneumoniae nitrogenase, MoFe protein (NifV(-) Kp1) has been determined and refined to a resolution, of 1.9 A. This is the first structure for a nitrogenase MoFe protein with, an altered cofactor. Moreover, it is the first direct evidence that the, organic acid citrate is not just present, but replaces homocitrate as a, ligand to the molybdenum atom of the iron molybdenum cofactor (FeMoco)., Subsequent refinement of the structure revealed that the citrate was, present at reduced occupancy.
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<StructureSection load='1h1l' size='340' side='right'caption='[[1h1l]], [[Resolution|resolution]] 1.90&Aring;' scene=''>
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== Structural highlights ==
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<table><tr><td colspan='2'>[[1h1l]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Klebsiella_pneumoniae Klebsiella pneumoniae]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1H1L OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1H1L 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">X-ray diffraction, [[Resolution|Resolution]] 1.9&#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=CFM:FE-MO-S+CLUSTER'>CFM</scene>, <scene name='pdbligand=CIT:CITRIC+ACID'>CIT</scene>, <scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=CLF:FE(8)-S(7)+CLUSTER'>CLF</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</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=1h1l FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1h1l OCA], [https://pdbe.org/1h1l PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1h1l RCSB], [https://www.ebi.ac.uk/pdbsum/1h1l PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1h1l ProSAT]</span></td></tr>
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/NIFD_KLEPN NIFD_KLEPN] This molybdenum-iron protein is part of the nitrogenase complex that catalyzes the key enzymatic reactions in nitrogen fixation.
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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/h1/1h1l_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=1h1l 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 x-ray crystal structure of NifV(-) Klebsiella pneumoniae nitrogenase MoFe protein (NifV(-) Kp1) has been determined and refined to a resolution of 1.9 A. This is the first structure for a nitrogenase MoFe protein with an altered cofactor. Moreover, it is the first direct evidence that the organic acid citrate is not just present, but replaces homocitrate as a ligand to the molybdenum atom of the iron molybdenum cofactor (FeMoco). Subsequent refinement of the structure revealed that the citrate was present at reduced occupancy.
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==About this Structure==
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Crystallographic analysis of the MoFe protein of nitrogenase from a nifV mutant of Klebsiella pneumoniae identifies citrate as a ligand to the molybdenum of iron molybdenum cofactor (FeMoco).,Mayer SM, Gormal CA, Smith BE, Lawson DM J Biol Chem. 2002 Sep 20;277(38):35263-6. Epub 2002 Jul 19. PMID:12133839<ref>PMID:12133839</ref>
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1H1L is a [http://en.wikipedia.org/wiki/Protein_complex Protein complex] structure of sequences from [http://en.wikipedia.org/wiki/Klebsiella_pneumoniae Klebsiella pneumoniae] with MG, CL, CIT, CFM and CLF as [http://en.wikipedia.org/wiki/ligands ligands]. Active as [http://en.wikipedia.org/wiki/Nitrogenase Nitrogenase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.18.6.1 1.18.6.1] Known structural/functional Site: <scene name='pdbsite=CT1:Clf Binding Site For Chain D'>CT1</scene>. Full crystallographic information is available from [http://ispc.weizmann.ac.il/oca-bin/ocashort?id=1H1L 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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Crystallographic analysis of the MoFe protein of nitrogenase from a nifV mutant of Klebsiella pneumoniae identifies citrate as a ligand to the molybdenum of iron molybdenum cofactor (FeMoco)., Mayer SM, Gormal CA, Smith BE, Lawson DM, J Biol Chem. 2002 Sep 20;277(38):35263-6. Epub 2002 Jul 19. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=12133839 12133839]
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</div>
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[[Category: Klebsiella pneumoniae]]
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<div class="pdbe-citations 1h1l" style="background-color:#fffaf0;"></div>
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[[Category: Nitrogenase]]
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[[Category: Protein complex]]
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[[Category: Gormal, C.A.]]
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[[Category: Lawson, D.M.]]
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[[Category: Mayer, S.M.]]
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[[Category: Smith, B.E.]]
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[[Category: CFM]]
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[[Category: CIT]]
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[[Category: CL]]
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[[Category: CLF]]
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[[Category: MG]]
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[[Category: biological nitrogen fixation]]
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[[Category: electron transfer]]
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[[Category: molybdoenzymes]]
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[[Category: nitrogen metabolism]]
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[[Category: oxidoreductase]]
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''Page seeded by [http://ispc.weizmann.ac.il/oca OCA ] on Tue Dec 18 15:52:25 2007''
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==See Also==
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*[[Nitrogenase 3D structures|Nitrogenase 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: Klebsiella pneumoniae]]
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[[Category: Large Structures]]
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[[Category: Gormal CA]]
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[[Category: Lawson DM]]
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[[Category: Mayer SM]]
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[[Category: Smith BE]]

Current revision

NITROGENASE MO-FE PROTEIN FROM KLEBSIELLA PNEUMONIAE, NIFV MUTANT

PDB ID 1h1l

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