1ii0

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[[Image:1ii0.gif|left|200px]]
 
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==CRYSTAL STRUCTURE OF THE ESCHERICHIA COLI ARSENITE-TRANSLOCATING ATPASE==
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The line below this paragraph, containing "STRUCTURE_1ii0", creates the "Structure Box" on the page.
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<StructureSection load='1ii0' size='340' side='right'caption='[[1ii0]], [[Resolution|resolution]] 2.40&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'>[[1ii0]] 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=1II0 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1II0 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]] 2.4&#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=ADP:ADENOSINE-5-DIPHOSPHATE'>ADP</scene>, <scene name='pdbligand=ATP:ADENOSINE-5-TRIPHOSPHATE'>ATP</scene>, <scene name='pdbligand=CD:CADMIUM+ION'>CD</scene>, <scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=TAS:TRIHYDROXYARSENITE(III)'>TAS</scene></td></tr>
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{{STRUCTURE_1ii0| PDB=1ii0 | 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=1ii0 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1ii0 OCA], [https://pdbe.org/1ii0 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1ii0 RCSB], [https://www.ebi.ac.uk/pdbsum/1ii0 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1ii0 ProSAT]</span></td></tr>
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/ARSA1_ECOLX ARSA1_ECOLX] Anion-transporting ATPase. Catalyzes the extrusion of the oxyanions arsenite, antimonite and arsenate. Maintenance of a low intracellular concentration of oxyanion produces resistance to the toxic agents.
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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/ii/1ii0_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=1ii0 ConSurf].
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<div style="clear:both"></div>
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'''CRYSTAL STRUCTURE OF THE ESCHERICHIA COLI ARSENITE-TRANSLOCATING ATPASE'''
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==See Also==
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*[[ATPase 3D structures|ATPase 3D structures]]
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__TOC__
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==Overview==
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</StructureSection>
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Structures of ArsA with ATP, AMP-PNP, or ADP.AlF(3) bound at the A2 nucleotide binding site were determined. Binding of different nucleotides modifies the coordination sphere of Mg(2+). In particular, the changes elicited by ADP.AlF(3) provide insights into the mechanism of ATP hydrolysis. In-line attack by water onto the gamma-phosphate of ATP would be followed first by formation of a trigonal intermediate and then by breaking of the scissile bond between the beta- and gamma-phosphates. Motions of amino acid side chains at the A2 nucleotide binding site during ATP binding and hydrolysis propagate at a distance, producing conformational changes in four different regions of the protein corresponding to helices H4-H5, helices H9-H10, helices H13-H15, and to the S1-H2-S2 region. These elements are extensions of, respectively, the Switch I and Switch II regions, the A-loop (a small loop near the nucleotide adenine moiety), and the P-loop. Based on the observed conformational changes, it is proposed that ArsA functions as a reciprocating engine that hydrolyzes 2 mol of ATP per each cycle of ion translocation across the membrane.
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==About this Structure==
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1II0 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=1II0 OCA].
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==Reference==
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Conformational changes in four regions of the Escherichia coli ArsA ATPase link ATP hydrolysis to ion translocation., Zhou T, Radaev S, Rosen BP, Gatti DL, J Biol Chem. 2001 Aug 10;276(32):30414-22. Epub 2001 Jun 6. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/11395509 11395509]
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[[Category: Arsenite-transporting ATPase]]
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[[Category: Escherichia coli]]
[[Category: Escherichia coli]]
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[[Category: Single protein]]
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[[Category: Large Structures]]
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[[Category: Gatti, D L.]]
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[[Category: Gatti DL]]
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[[Category: Radaev, S.]]
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[[Category: Radaev S]]
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[[Category: Rosen, B P.]]
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[[Category: Rosen BP]]
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[[Category: Zhou, T.]]
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[[Category: Zhou T]]
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[[Category: Arsa atpase]]
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[[Category: Atp]]
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[[Category: Atp binding site]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 20:01:32 2008''
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Current revision

CRYSTAL STRUCTURE OF THE ESCHERICHIA COLI ARSENITE-TRANSLOCATING ATPASE

PDB ID 1ii0

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