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1fqw

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[[Image:1fqw.gif|left|200px]]
 
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==CRYSTAL STRUCTURE OF ACTIVATED CHEY==
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The line below this paragraph, containing "STRUCTURE_1fqw", creates the "Structure Box" on the page.
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<StructureSection load='1fqw' size='340' side='right'caption='[[1fqw]], [[Resolution|resolution]] 2.37&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'>[[1fqw]] 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=1FQW OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1FQW 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]] 2.37&#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=BEF:BERYLLIUM+TRIFLUORIDE+ION'>BEF</scene>, <scene name='pdbligand=MN:MANGANESE+(II)+ION'>MN</scene></td></tr>
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{{STRUCTURE_1fqw| PDB=1fqw | 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=1fqw FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1fqw OCA], [https://pdbe.org/1fqw PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1fqw RCSB], [https://www.ebi.ac.uk/pdbsum/1fqw PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1fqw ProSAT]</span></td></tr>
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</table>
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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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[[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/fq/1fqw_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=1fqw ConSurf].
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<div style="clear:both"></div>
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'''CRYSTAL STRUCTURE OF ACTIVATED CHEY'''
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==See Also==
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*[[Chemotaxis protein 3D structures|Chemotaxis protein 3D structures]]
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== References ==
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==Overview==
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<references/>
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The crystal structure of BeF(3)(-)-activated CheY, with manganese in the magnesium binding site, was determined at 2.4-A resolution. BeF(3)(-) bonds to Asp(57), the normal site of phosphorylation, forming a hydrogen bond and salt bridge with Thr(87) and Lys(109), respectively. The six coordination sites for manganese are satisfied by a fluorine of BeF(3)(-), the side chain oxygens of Asp(13) and Asp(57), the carbonyl oxygen of Asn(59), and two water molecules. All of the active site interactions seen for BeF(3)(-)-CheY are also observed in P-Spo0A(r). Thus, BeF(3)(-) activates CheY as well as other receiver domains by mimicking both the tetrahedral geometry and electrostatic potential of a phosphoryl group. The aromatic ring of Tyr(106) is found buried within a hydrophobic pocket formed by beta-strand beta4 and helix H4. The tyrosine side chain is stabilized in this conformation by a hydrogen bond between the hydroxyl group and the backbone carbonyl oxygen of Glu(89). This hydrogen bond appears to stabilize the active conformation of the beta4/H4 loop. Comparison of the backbone coordinates for the active and inactive states of CheY reveals that only modest changes occur upon activation, except in the loops, with the largest changes occurring in the beta4/H4 loop. This region is known to be conformationally flexible in inactive CheY and is part of the surface used by activated CheY for binding its target, FliM. The pattern of activation-induced backbone coordinate changes is similar to that seen in FixJ(r). A common feature in the active sites of BeF(3)(-)-CheY, P-Spo0A(r), P-FixJ(r), and phosphono-CheY is a salt bridge between Lys(109) Nzeta and the phosphate or its equivalent, beryllofluoride. This suggests that, in addition to the concerted movements of Thr(87) and Tyr(106) (Thr-Tyr coupling), formation of the Lys(109)-PO(3)(-) salt bridge is directly involved in the activation of receiver domains generally.
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__TOC__
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</StructureSection>
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==About this Structure==
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1FQW 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=1FQW OCA].
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==Reference==
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Crystal structure of activated CheY. Comparison with other activated receiver domains., Lee SY, Cho HS, Pelton JG, Yan D, Berry EA, Wemmer DE, J Biol Chem. 2001 May 11;276(19):16425-31. Epub 2001 Feb 13. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/11279165 11279165]
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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: Berry, E A.]]
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[[Category: Berry EA]]
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[[Category: Cho, H S.]]
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[[Category: Cho HS]]
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[[Category: Lee, S Y.]]
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[[Category: Lee SY]]
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[[Category: Pelton, J G.]]
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[[Category: Pelton JG]]
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[[Category: Wemmer, D E.]]
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[[Category: Wemmer DE]]
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[[Category: Yan, D.]]
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[[Category: Yan D]]
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[[Category: Activated chey]]
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[[Category: Bef3]]
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[[Category: Chemotaxis]]
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[[Category: Receiver domain]]
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[[Category: Response regulator]]
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[[Category: Two-component signal transduction]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 16:39:42 2008''
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Current revision

CRYSTAL STRUCTURE OF ACTIVATED CHEY

PDB ID 1fqw

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