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[[Image:3chy.gif|left|200px]]


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==CRYSTAL STRUCTURE OF ESCHERICHIA COLI CHEY REFINED AT 1.7-ANGSTROM RESOLUTION==
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<StructureSection load='3chy' size='340' side='right'caption='[[3chy]], [[Resolution|resolution]] 1.66&Aring;' scene=''>
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== Structural highlights ==
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<table><tr><td colspan='2'>[[3chy]] is a 1 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=3CHY OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3CHY 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]] 1.66&#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=SO4:SULFATE+ION'>SO4</scene></td></tr>
{{STRUCTURE_3chy|  PDB=3chy  |  SCENE= }}
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=3chy FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3chy OCA], [https://pdbe.org/3chy PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3chy RCSB], [https://www.ebi.ac.uk/pdbsum/3chy PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3chy ProSAT]</span></td></tr>
 
</table>
'''CRYSTAL STRUCTURE OF ESCHERICHIA COLI CHEY REFINED AT 1.7-ANGSTROM RESOLUTION'''
== Function ==
 
[https://www.uniprot.org/uniprot/CHEY_ECOLI CHEY_ECOLI] Involved in the transmission of sensory signals from the chemoreceptors to the flagellar motors. In its active (phosphorylated or acetylated) form, CheY exhibits enhanced binding to a switch component, FliM, at the flagellar motor which induces a change from counterclockwise to clockwise flagellar rotation. Overexpression of CheY in association with MotA and MotB improves motility of a ycgR disruption, suggesting there is an interaction (direct or indirect) between the c-di-GMP-binding flagellar brake protein and the flagellar stator.<ref>PMID:20346719</ref>
 
== Evolutionary Conservation ==
==Overview==
[[Image:Consurf_key_small.gif|200px|right]]
The three-dimensional structure of wild-type CheY from Escherichia coli has been refined by stereochemically restrained least squares minimization to a crystallographic R-factor of 15.1% at 1.7-A resolution. The structure contains 1165 atoms, including all atoms of the protein, 147 water molecules, and three sulfate ions. The final model has root mean square deviations of 0.018 and 0.049 A from idealized bond lengths and angle distances, respectively. Seven amino acid side chains have been modeled in dual conformations. CheY folds as a compact (beta/alpha)5 globular protein, with the phosphorylation region contained in a cavity on one face of the molecule. This active site area is bordered by the carboxyl termini of the three central beta-strands, by alpha 1, and by the loop connecting beta 5 to alpha 5. The Lys-109 side chain of this loop extends into the active site by virtue of its cis peptide bond conformation preceding Pro-110. The epsilon-amino group of Lys-109 is in close bonding contact with the carboxyl group of Asp-57, the residue that is phosphorylated in the activation process of CheY. The details of the hydrogen bonding network in the phosphorylation region indicate that structural rearrangements must accompany the phosphorylation of Asp-57.
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==About this Structure==
    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/ch/3chy_consurf.spt"</scriptWhenChecked>
3CHY 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=3CHY OCA].  
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
 
    <text>to colour the structure by Evolutionary Conservation</text>
==Reference==
  </jmolCheckbox>
Crystal structure of Escherichia coli CheY refined at 1.7-A resolution., Volz K, Matsumura P, J Biol Chem. 1991 Aug 15;266(23):15511-9. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/1869568 1869568]
</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=3chy ConSurf].
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== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Escherichia coli]]
[[Category: Escherichia coli]]
[[Category: Single protein]]
[[Category: Large Structures]]
[[Category: Matsumura, P.]]
[[Category: Matsumura P]]
[[Category: Volz, K.]]
[[Category: Volz K]]
[[Category: Signal transduction protein]]
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