1hey

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[[Image:1hey.gif|left|200px]]
 
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==INVESTIGATING THE STRUCTURAL DETERMINANTS OF THE P21-LIKE TRIPHOSPHATE AND MG2+ BINDING SITE==
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The line below this paragraph, containing "STRUCTURE_1hey", creates the "Structure Box" on the page.
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<StructureSection load='1hey' size='340' side='right'caption='[[1hey]], [[Resolution|resolution]] 2.24&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'>[[1hey]] 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=1HEY OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1HEY 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]] 2.24&#8491;</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=1hey FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1hey OCA], [https://pdbe.org/1hey PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1hey RCSB], [https://www.ebi.ac.uk/pdbsum/1hey PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1hey ProSAT]</span></td></tr>
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{{STRUCTURE_1hey| PDB=1hey | SCENE= }}
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</table>
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== Function ==
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'''INVESTIGATING THE STRUCTURAL DETERMINANTS OF THE P21-LIKE TRIPHOSPHATE AND MG2+ BINDING SITE'''
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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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==Overview==
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Check<jmol>
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Amongst the superfamily of nucleotide binding proteins, the classical mononucleotide binding fold (CMBF), is the one that has been best characterized structurally. The common denominator of all the members is the triphosphate/Mg2+ binding site, whose signature has been recognized as two structurally conserved stretches of residues: the Kinase 1 and 2 motifs that participate in triphosphate and Mg2+ binding, respectively. The Kinase 1 motif is borne by a loop (the P-loop), whose structure is conserved throughout the whole CMBF family. The low sequence similarity between the different members raises questions about which interactions are responsible for the active structure of the P-loop. What are the minimal requirements for the active structure of the P-loop? Why is the P-loop structure conserved despite the diverse environments in which it is found? To address this question, we have engineered the Kinase 1 and 2 motifs into a protein that has the CMBF and no nucleotide binding activity, the chemotactic protein from Escherichia coli, CheY. The mutant does not exhibit any triphosphate/Mg2+ binding activity. The crystal structure of the mutant reveals that the engineered P-loop is in a different conformation than that found in the CMBF. This demonstrates that the native structure of the P-loop requires external interactions with the rest of the protein. On the basis of an analysis of the conserved tertiary contacts of the P-loop in the mononucleotide binding superfamily, we propose a set of residues that could play an important role in the acquisition of the active structure of the P-loop.
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<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/he/1hey_consurf.spt"</scriptWhenChecked>
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==About this Structure==
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
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1HEY 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=1HEY OCA].
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<text>to colour the structure by Evolutionary Conservation</text>
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</jmolCheckbox>
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==Reference==
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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=1hey ConSurf].
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Investigating the structural determinants of the p21-like triphosphate and Mg2+ binding site., Cronet P, Bellsolell L, Sander C, Coll M, Serrano L, J Mol Biol. 1995 Jun 9;249(3):654-64. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/7783218 7783218]
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<div style="clear:both"></div>
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== References ==
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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: Bellsolell, L.]]
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[[Category: Bellsolell L]]
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[[Category: Coll, M.]]
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[[Category: Coll M]]
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[[Category: Chemotaxis]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 18:46:59 2008''
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Current revision

INVESTIGATING THE STRUCTURAL DETERMINANTS OF THE P21-LIKE TRIPHOSPHATE AND MG2+ BINDING SITE

PDB ID 1hey

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