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1ehc

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[[Image:1ehc.jpg|left|200px]]
 
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==STRUCTURE OF SIGNAL TRANSDUCTION PROTEIN CHEY==
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The line below this paragraph, containing "STRUCTURE_1ehc", creates the "Structure Box" on the page.
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<StructureSection load='1ehc' size='340' side='right'caption='[[1ehc]], [[Resolution|resolution]] 2.26&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'>[[1ehc]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_coli_K-12 Escherichia coli K-12]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1EHC OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1EHC 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]] 2.26&#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>
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{{STRUCTURE_1ehc| PDB=1ehc | 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=1ehc FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1ehc OCA], [https://pdbe.org/1ehc PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1ehc RCSB], [https://www.ebi.ac.uk/pdbsum/1ehc PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1ehc ProSAT]</span></td></tr>
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</table>
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'''STRUCTURE OF SIGNAL TRANSDUCTION PROTEIN CHEY'''
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== Function ==
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[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>
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== Evolutionary Conservation ==
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==Overview==
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[[Image:Consurf_key_small.gif|200px|right]]
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An aspartate to lysine mutation at position 13 of the chemotaxis regulatory protein CheY causes a constitutive tumbly phenotype when expressed at high copy number in vivo even though the mutant protein is not phosphorylatable. These properties suggest that the D13K mutant adopts the active, signaling conformation of CheY independent of phosphorylation, so knowledge of its structure could explain the activation mechanism of CheY. The x-ray crystallographic structure of the CheY D13K mutant has been solved and refined at 2.3 A resolution to an R-factor of 14.3%. The mutant molecule shows no significant differences in backbone conformation when compared with the wild-type, Mg2+-free structure, but there are localized changes within the active site. The side chain of lysine 13 blocks access to the active site, whereas its epsilon-amino group has no bonding interactions with other groups in the region. Also in the active site, the bond between lysine 109 and aspartate 57 is weakened, and the solvent structure is perturbed. Although the D13K mutant has the inactive conformation in the crystalline form, rearrangements in the active site appear to weaken the overall structure of that region, potentially creating a metastable state of the molecule. If a conformational change is required for signaling by CheY D13K, then it most likely proceeds dynamically, in solution.
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Check<jmol>
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<jmolCheckbox>
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==About this Structure==
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<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/eh/1ehc_consurf.spt"</scriptWhenChecked>
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1EHC 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=1EHC OCA].
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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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==Reference==
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</jmolCheckbox>
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Uncoupled phosphorylation and activation in bacterial chemotaxis. The 2.3 A structure of an aspartate to lysine mutant at position 13 of CheY., Jiang M, Bourret RB, Simon MI, Volz K, J Biol Chem. 1997 May 2;272(18):11850-5. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/9115243 9115243]
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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=1ehc ConSurf].
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[[Category: Escherichia coli]]
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<div style="clear:both"></div>
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[[Category: Single protein]]
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== References ==
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[[Category: Bourret, R.]]
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<references/>
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[[Category: Jiang, M.]]
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__TOC__
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[[Category: Simon, M.]]
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</StructureSection>
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[[Category: Volz, K.]]
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[[Category: Escherichia coli K-12]]
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[[Category: Chemotaxis]]
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[[Category: Large Structures]]
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[[Category: Chey]]
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[[Category: Bourret R]]
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[[Category: Flagellar rot]]
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[[Category: Jiang M]]
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[[Category: Phosphorylation]]
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[[Category: Simon M]]
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[[Category: Response regulator]]
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[[Category: Volz K]]
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[[Category: Sensory transduction]]
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[[Category: Signal transduction]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 15:06:13 2008''
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Current revision

STRUCTURE OF SIGNAL TRANSDUCTION PROTEIN CHEY

PDB ID 1ehc

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