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[[Image:1t72.gif|left|200px]]<br /><applet load="1t72" size="350" color="white" frame="true" align="right" spinBox="true"
caption="1t72, resolution 2.9&Aring;" />
'''Crystal structure of phosphate transport system protein phoU from Aquifex aeolicus'''<br />


==Overview==
==Crystal structure of phosphate transport system protein phoU from Aquifex aeolicus==
The phoU gene of Aquifex aeolicus encodes a protein called PHOU_AQUAE with sequence similarity to the PhoU protein of Escherichia coli. Despite the fact that there is a large number of family members (more than 300) attributed to almost all known bacteria and despite PHOU_AQUAE's association with the regulation of genes for phosphate metabolism, the nature of its regulatory function is not well understood. Nearly one-half of these PhoU-like proteins, including both PHOU_AQUAE and the one from E. coli, form a subfamily with an apparent dimer structure of two PhoU domains on the basis of their amino acid sequence. The crystal structure of PHOU_AQUAE (a 221-amino-acid protein) reveals two similar coiled-coil PhoU domains, each forming a three-helix bundle. The structures of PHOU_AQUAE proteins from both a soluble fraction and refolded inclusion bodies (at resolutions of 2.8 and 3.2A, respectively) showed no significant differences. The folds of the PhoU domain and Bag domains (for a class of cofactors of the eukaryotic chaperone Hsp70 family) are similar. Accordingly, we propose that gene regulation by PhoU may occur by association of PHOU_AQUAE with the ATPase domain of the histidine kinase PhoR, promoting release of its substrate PhoB. Other proteins that share the PhoU domain fold include the coiled-coil domains of the STAT protein, the ribosome-recycling factor, and structural proteins like spectrin.
<StructureSection load='1t72' size='340' side='right'caption='[[1t72]], [[Resolution|resolution]] 2.90&Aring;' scene=''>
 
== Structural highlights ==
==About this Structure==
<table><tr><td colspan='2'>[[1t72]] is a 6 chain structure with sequence from [https://en.wikipedia.org/wiki/Aquifex_aeolicus Aquifex aeolicus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1T72 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1T72 FirstGlance]. <br>
1T72 is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Aquifex_aeolicus Aquifex aeolicus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1T72 OCA].  
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.9&#8491;</td></tr>
 
<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>
==Reference==
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1t72 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1t72 OCA], [https://pdbe.org/1t72 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1t72 RCSB], [https://www.ebi.ac.uk/pdbsum/1t72 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1t72 ProSAT], [https://www.topsan.org/Proteins/BSGC/1t72 TOPSAN]</span></td></tr>
Crystal structure of the "PhoU-like" phosphate uptake regulator from Aquifex aeolicus., Oganesyan V, Oganesyan N, Adams PD, Jancarik J, Yokota HA, Kim R, Kim SH, J Bacteriol. 2005 Jun;187(12):4238-44. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=15937186 15937186]
</table>
== Function ==
[https://www.uniprot.org/uniprot/PHOU_AQUAE PHOU_AQUAE] Plays a role in the regulation of phosphate uptake. In this role, it may bind, possibly as a chaperone, to PhoR, PhoB or a PhoR-PhoB complex to promote dephosphorylation of phospho-PhoB, or inhibit formation of the PhoR-PhoB transitory complex (Probable).
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
Check<jmol>
  <jmolCheckbox>
    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/t7/1t72_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
    <text>to colour the structure by Evolutionary Conservation</text>
  </jmolCheckbox>
</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=1t72 ConSurf].
<div style="clear:both"></div>
__TOC__
</StructureSection>
[[Category: Aquifex aeolicus]]
[[Category: Aquifex aeolicus]]
[[Category: Single protein]]
[[Category: Large Structures]]
[[Category: Adams, P D.]]
[[Category: Adams PD]]
[[Category: BSGC, Berkeley Structural Genomics Center.]]
[[Category: Jancarik J]]
[[Category: Jancarik, J.]]
[[Category: Kim R]]
[[Category: Kim, R.]]
[[Category: Kim S-H]]
[[Category: Kim, S H.]]
[[Category: Oganesyan N]]
[[Category: Oganesyan, N.]]
[[Category: Oganesyan V]]
[[Category: Oganesyan, V.]]
[[Category: berkeley structural genomics center]]
[[Category: bsgc structure funded by nih]]
[[Category: helix bundle]]
[[Category: protein structure initiative]]
[[Category: psi]]
[[Category: structural genomics]]
 
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Retrieved from "https://proteopedia.org/1t72"