1jfv

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(New page: 200px<br /><applet load="1jfv" size="450" color="white" frame="true" align="right" spinBox="true" caption="1jfv, resolution 2.00&Aring;" /> '''X-Ray Structure of o...)
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[[Image:1jfv.jpg|left|200px]]<br /><applet load="1jfv" size="450" color="white" frame="true" align="right" spinBox="true"
 
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caption="1jfv, resolution 2.00&Aring;" />
 
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'''X-Ray Structure of oxidised C10S, C15A arsenate reductase from pI258'''<br />
 
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==Overview==
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==X-Ray Structure of oxidised C10S, C15A arsenate reductase from pI258==
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Arsenate reductase (ArsC) from Staphylococcus aureus plasmid pI258 plays a, role in bacterial heavy metal resistance and catalyzes the reduction of, arsenate to arsenite. The structures of the oxidized and reduced forms of, ArsC were solved. ArsC has the PTPase I fold typical for low molecular, weight tyrosine phosphatases (LMW PTPases). Remarkably, kinetic, experiments show that pI258 ArsC also catalyzes the tyrosine phosphatase, reaction in addition to arsenate reduction. These results provide evidence, that ArsC from pI258 evolved from LMW PTPase by the grafting of a redox, function onto a pre-existing catalytic site and that its evolutionary, origin is different from those of arsenate reductases from Escherichia, coli plasmid R773 and from Saccharomyces cerevisiae. The mechanism, proposed here for the catalysis of arsenate reduction by pI258 ArsC, involves a nucleophilic attack by Cys 10 on arsenate, the formation of a, covalent intermediate and the transport of oxidative equivalents by a, disulfide cascade. The reaction is associated with major structural, changes in the ArsC.
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<StructureSection load='1jfv' size='340' side='right'caption='[[1jfv]], [[Resolution|resolution]] 2.00&Aring;' scene=''>
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== Structural highlights ==
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<table><tr><td colspan='2'>[[1jfv]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Staphylococcus_aureus Staphylococcus aureus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1JFV OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1JFV 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]] 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=K:POTASSIUM+ION'>K</scene>, <scene name='pdbligand=LCP:PERCHLORATE+ION'>LCP</scene>, <scene name='pdbligand=MSE:SELENOMETHIONINE'>MSE</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=1jfv FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1jfv OCA], [https://pdbe.org/1jfv PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1jfv RCSB], [https://www.ebi.ac.uk/pdbsum/1jfv PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1jfv ProSAT]</span></td></tr>
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/ARSC_STAAU ARSC_STAAU] Reduces arsenate [As(V)] to arsenite [As(III)] and dephosphorylates tyrosine phosphorylated proteins, low-MW aryl phosphates and natural and synthetic acyl phosphates. Could switch between different functions in different circumstances.[HAMAP-Rule:MF_01624]
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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/jf/1jfv_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=1jfv 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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Arsenate reductase (ArsC) from Staphylococcus aureus plasmid pI258 plays a role in bacterial heavy metal resistance and catalyzes the reduction of arsenate to arsenite. The structures of the oxidized and reduced forms of ArsC were solved. ArsC has the PTPase I fold typical for low molecular weight tyrosine phosphatases (LMW PTPases). Remarkably, kinetic experiments show that pI258 ArsC also catalyzes the tyrosine phosphatase reaction in addition to arsenate reduction. These results provide evidence that ArsC from pI258 evolved from LMW PTPase by the grafting of a redox function onto a pre-existing catalytic site and that its evolutionary origin is different from those of arsenate reductases from Escherichia coli plasmid R773 and from Saccharomyces cerevisiae. The mechanism proposed here for the catalysis of arsenate reduction by pI258 ArsC involves a nucleophilic attack by Cys 10 on arsenate, the formation of a covalent intermediate and the transport of oxidative equivalents by a disulfide cascade. The reaction is associated with major structural changes in the ArsC.
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==About this Structure==
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Arsenate reductase from S. aureus plasmid pI258 is a phosphatase drafted for redox duty.,Zegers I, Martins JC, Willem R, Wyns L, Messens J Nat Struct Biol. 2001 Oct;8(10):843-7. PMID:11573087<ref>PMID:11573087</ref>
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1JFV is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Staphylococcus_aureus Staphylococcus aureus] with LCP and K as [http://en.wikipedia.org/wiki/ligands ligands]. Full crystallographic information is available from [http://ispc.weizmann.ac.il/oca-bin/ocashort?id=1JFV 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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Arsenate reductase from S. aureus plasmid pI258 is a phosphatase drafted for redox duty., Zegers I, Martins JC, Willem R, Wyns L, Messens J, Nat Struct Biol. 2001 Oct;8(10):843-7. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=11573087 11573087]
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</div>
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[[Category: Single protein]]
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<div class="pdbe-citations 1jfv" style="background-color:#fffaf0;"></div>
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[[Category: Staphylococcus aureus]]
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[[Category: Martins, J.C.]]
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[[Category: Messens, J.]]
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[[Category: Willem, R.]]
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[[Category: Wyns, L.]]
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[[Category: Zegers, I.]]
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[[Category: K]]
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[[Category: LCP]]
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[[Category: arsenate reductase]]
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[[Category: oxidised]]
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[[Category: perchlorate]]
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[[Category: potassium]]
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''Page seeded by [http://ispc.weizmann.ac.il/oca OCA ] on Tue Nov 20 18:12:29 2007''
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==See Also==
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*[[Arsenate reductase 3D structures|Arsenate reductase 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: Large Structures]]
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[[Category: Staphylococcus aureus]]
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[[Category: Martins JC]]
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[[Category: Messens J]]
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[[Category: Willem R]]
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[[Category: Wyns L]]
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[[Category: Zegers I]]

Current revision

X-Ray Structure of oxidised C10S, C15A arsenate reductase from pI258

PDB ID 1jfv

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