1zlq

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[[Image:1zlq.gif|left|200px]]
 
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==Crystallographic and spectroscopic evidence for high affinity binding of Fe EDTA (H2O)- to the periplasmic nickel transporter NikA==
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The line below this paragraph, containing "STRUCTURE_1zlq", creates the "Structure Box" on the page.
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<StructureSection load='1zlq' size='340' side='right'caption='[[1zlq]], [[Resolution|resolution]] 1.80&Aring;' scene=''>
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You may change the PDB parameter (which sets the PDB file loaded into the applet)
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== Structural highlights ==
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or the SCENE parameter (which sets the initial scene displayed when the page is loaded),
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<table><tr><td colspan='2'>[[1zlq]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1ZLQ OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1ZLQ FirstGlance]. <br>
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or leave the SCENE parameter empty for the default display.
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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]] 1.8&#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=ACT:ACETATE+ION'>ACT</scene>, <scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=DTT:2,3-DIHYDROXY-1,4-DITHIOBUTANE'>DTT</scene>, <scene name='pdbligand=EDT:{[-(BIS-CARBOXYMETHYL-AMINO)-ETHYL]-CARBOXYMETHYL-AMINO}-ACETIC+ACID'>EDT</scene>, <scene name='pdbligand=FE:FE+(III)+ION'>FE</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr>
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{{STRUCTURE_1zlq| PDB=1zlq | SCENE= }}
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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=1zlq FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1zlq OCA], [https://pdbe.org/1zlq PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1zlq RCSB], [https://www.ebi.ac.uk/pdbsum/1zlq PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1zlq ProSAT]</span></td></tr>
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/NIKA_ECOLI NIKA_ECOLI] Involved in a nickel transport system, probably represents the nickel binder.
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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/zl/1zlq_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=1zlq 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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Because nickel is both essential and toxic to a great variety of organisms, its detection and transport is highly regulated. In Escherichia coli and other related Gram-negative bacteria, high affinity nickel transport depends on proteins expressed by the nik operon. A central actor of this process is the periplasmic NikA transport protein. A previous structural report has proposed that nickel binds to NikA as a pentahydrate species. However, both stereochemical considerations and X-ray absorption spectroscopic results are incompatible with that interpretation. Here, we report the 1.8 A resolution structure of NikA and show that it binds FeEDTA(H2O)- with very high affinity. In addition, we provide crystallographic evidence that a metal-EDTA complex was also bound to the previously reported NikA structure. Our observations strongly suggest that nickel transport in E. coli requires the binding of this metal ion to a metallophore that bears significant resemblance to EDTA. They also provide a basis for the potential use of NikA in the bioremediation of toxic transition metals and the design of artificial metalloenzymes.
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'''Crystallographic and spectroscopic evidence for high affinity binding of Fe EDTA (H2O)- to the periplasmic nickel transporter NikA'''
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Crystallographic and spectroscopic evidence for high affinity binding of FeEDTA(H2O)- to the periplasmic nickel transporter NikA.,Cherrier MV, Martin L, Cavazza C, Jacquamet L, Lemaire D, Gaillard J, Fontecilla-Camps JC J Am Chem Soc. 2005 Jul 20;127(28):10075-82. PMID:16011372<ref>PMID:16011372</ref>
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==Overview==
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Because nickel is both essential and toxic to a great variety of organisms, its detection and transport is highly regulated. In Escherichia coli and other related Gram-negative bacteria, high affinity nickel transport depends on proteins expressed by the nik operon. A central actor of this process is the periplasmic NikA transport protein. A previous structural report has proposed that nickel binds to NikA as a pentahydrate species. However, both stereochemical considerations and X-ray absorption spectroscopic results are incompatible with that interpretation. Here, we report the 1.8 A resolution structure of NikA and show that it binds FeEDTA(H2O)- with very high affinity. In addition, we provide crystallographic evidence that a metal-EDTA complex was also bound to the previously reported NikA structure. Our observations strongly suggest that nickel transport in E. coli requires the binding of this metal ion to a metallophore that bears significant resemblance to EDTA. They also provide a basis for the potential use of NikA in the bioremediation of toxic transition metals and the design of artificial metalloenzymes.
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==About this Structure==
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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1ZLQ is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1ZLQ OCA].
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</div>
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<div class="pdbe-citations 1zlq" style="background-color:#fffaf0;"></div>
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==Reference==
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==See Also==
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Crystallographic and spectroscopic evidence for high affinity binding of FeEDTA(H2O)- to the periplasmic nickel transporter NikA., Cherrier MV, Martin L, Cavazza C, Jacquamet L, Lemaire D, Gaillard J, Fontecilla-Camps JC, J Am Chem Soc. 2005 Jul 20;127(28):10075-82. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/16011372 16011372]
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*[[ABC transporter 3D structures|ABC transporter 3D structures]]
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== References ==
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<references/>
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__TOC__
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</StructureSection>
[[Category: Escherichia coli]]
[[Category: Escherichia coli]]
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[[Category: Nickel-transporting ATPase]]
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[[Category: Large Structures]]
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[[Category: Single protein]]
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[[Category: Cavazza C]]
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[[Category: Camps, J C.Fontecilla.]]
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[[Category: Cherrier MV]]
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[[Category: Cavazza, C.]]
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[[Category: Fontecilla Camps JC]]
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[[Category: Cherrier, M V.]]
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[[Category: Gaillard J]]
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[[Category: Gaillard, J.]]
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[[Category: Jacquamet L]]
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[[Category: Jacquamet, L.]]
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[[Category: Lemaire D]]
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[[Category: Lemaire, D.]]
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[[Category: Martin L]]
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[[Category: Martin, L.]]
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[[Category: Bacteria]]
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[[Category: Edta]]
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[[Category: Nickel]]
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[[Category: Periplasm]]
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[[Category: Transport]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 17:46:42 2008''
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Current revision

Crystallographic and spectroscopic evidence for high affinity binding of Fe EDTA (H2O)- to the periplasmic nickel transporter NikA

PDB ID 1zlq

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