2pkx

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[[Image:2pkx.gif|left|200px]]<br /><applet load="2pkx" size="350" color="white" frame="true" align="right" spinBox="true"
 
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caption="2pkx, resolution 2.54&Aring;" />
 
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'''E.coli response regulator PhoP receiver domain'''<br />
 
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==Overview==
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==E.coli response regulator PhoP receiver domain==
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The response regulator PhoP is part of the PhoQ/PhoP two-component system involved in responses to depletion of extracellular Mg(2+). Here, we report the crystal structures of the receiver domain of Escherichia coli PhoP determined in the absence and presence of the phosphoryl analog beryllofluoride. In the presence of beryllofluoride, the active receiver domain forms a twofold symmetric dimer similar to that seen in structures of other regulatory domains from the OmpR/PhoB family, providing further evidence that members of this family utilize a common mode of dimerization in the active state. In the absence of activating agents, the PhoP receiver domain crystallizes with a similar structure, consistent with the previous observation that high concentrations can promote an active state of PhoP independent of phosphorylation.
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<StructureSection load='2pkx' size='340' side='right'caption='[[2pkx]], [[Resolution|resolution]] 2.54&Aring;' scene=''>
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== Structural highlights ==
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<table><tr><td colspan='2'>[[2pkx]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. This structure supersedes the now removed PDB entry [http://oca.weizmann.ac.il/oca-bin/send-pdb?obs=1&id=2eu6 2eu6]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2PKX OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2PKX 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]] 2.54&#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=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=2pkx FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2pkx OCA], [https://pdbe.org/2pkx PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2pkx RCSB], [https://www.ebi.ac.uk/pdbsum/2pkx PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2pkx ProSAT]</span></td></tr>
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/PHOP_ECOLI PHOP_ECOLI] Member of the two-component regulatory system PhoP/PhoQ involved in adaptation to low Mg(2+) environments and the control of acid resistance genes. In low periplasmic Mg(2+), PhoQ phosphorylates PhoP, resulting in the expression of PhoP-activated genes (PAG) and repression of PhoP-repressed genes (PRG). In high periplasmic Mg(2+), PhoQ dephosphorylates phospho-PhoP, resulting in the repression of PAG and may lead to expression of some PRG (By similarity). Mediates magnesium influx to the cytosol by activation of MgtA. Promotes expression of the two-component regulatory system rstA/rstB and transcription of the hemL, mgrB, nagA, slyB, vboR and yrbL genes.<ref>PMID:10464230</ref>
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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/pk/2pkx_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=2pkx ConSurf].
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<div style="clear:both"></div>
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==About this Structure==
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==See Also==
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2PKX is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. This structure supersedes the now removed PDB entry 2EU6. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2PKX OCA].
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*[[PhoP-PhoQ|PhoP-PhoQ]]
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*[[Response regulator 3D structure|Response regulator 3D structure]]
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==Reference==
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== References ==
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Crystal structures of the receiver domain of the response regulator PhoP from Escherichia coli in the absence and presence of the phosphoryl analog beryllofluoride., Bachhawat P, Stock AM, J Bacteriol. 2007 Aug;189(16):5987-95. Epub 2007 Jun 1. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=17545283 17545283]
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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: Single protein]]
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[[Category: Large Structures]]
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[[Category: Bachhawat, P.]]
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[[Category: Bachhawat P]]
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[[Category: chey like fold]]
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[[Category: phob family]]
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[[Category: phop]]
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[[Category: response regulator]]
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[[Category: transcription factor]]
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[[Category: virulence]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 18:30:30 2008''
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Current revision

E.coli response regulator PhoP receiver domain

PDB ID 2pkx

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