1b3q

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(New page: 200px<br /><applet load="1b3q" size="450" color="white" frame="true" align="right" spinBox="true" caption="1b3q, resolution 2.6&Aring;" /> '''CRYSTAL STRUCTURE OF ...)
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[[Image:1b3q.gif|left|200px]]<br /><applet load="1b3q" size="450" color="white" frame="true" align="right" spinBox="true"
 
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caption="1b3q, resolution 2.6&Aring;" />
 
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'''CRYSTAL STRUCTURE OF CHEA-289, A SIGNAL TRANSDUCING HISTIDINE KINASE'''<br />
 
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==Overview==
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==CRYSTAL STRUCTURE OF CHEA-289, A SIGNAL TRANSDUCING HISTIDINE KINASE==
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Histidine kinases allow bacteria, plants, and fungi to sense and respond, to their environment. The 2.6 A resolution crystal structure of Thermotoga, maritima CheA (290-671) histidine kinase reveals a dimer where the, functions of dimerization, ATP binding, and regulation are segregated into, domains. The kinase domain is unlike Ser/Thr/Tyr kinases but resembles two, ATPases, Gyrase B and Hsp90. Structural analogies within this superfamily, suggest that the P1 domain of CheA provides the nucleophilic histidine and, activating glutamate for phosphotransfer. The regulatory domain, which, binds the homologous receptor-coupling protein CheW, topologically, resembles two SH3 domains and provides different protein recognition, surfaces at each end. The dimerization domain forms a central four-helix, bundle about which the kinase and regulatory domains pivot on conserved, hinges to modulate transphosphorylation. Different subunit conformations, suggest that relative domain motions link receptor response to kinase, activity.
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<StructureSection load='1b3q' size='340' side='right'caption='[[1b3q]], [[Resolution|resolution]] 2.60&Aring;' scene=''>
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== Structural highlights ==
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<table><tr><td colspan='2'>[[1b3q]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Thermotoga_maritima Thermotoga maritima]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1B3Q OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1B3Q 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]] 2.6&#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=HG:MERCURY+(II)+ION'>HG</scene></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=1b3q FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1b3q OCA], [https://pdbe.org/1b3q PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1b3q RCSB], [https://www.ebi.ac.uk/pdbsum/1b3q PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1b3q ProSAT]</span></td></tr>
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/CHEA_THEMA CHEA_THEMA] Involved in the transmission of sensory signals from the chemoreceptors to the flagellar motors. CheA is autophosphorylated; it can transfer its phosphate group to either CheB or CheY (By similarity).
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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/b3/1b3q_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=1b3q ConSurf].
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<div style="clear:both"></div>
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<div style="background-color:#fffaf0;">
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== Publication Abstract from PubMed ==
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Histidine kinases allow bacteria, plants, and fungi to sense and respond to their environment. The 2.6 A resolution crystal structure of Thermotoga maritima CheA (290-671) histidine kinase reveals a dimer where the functions of dimerization, ATP binding, and regulation are segregated into domains. The kinase domain is unlike Ser/Thr/Tyr kinases but resembles two ATPases, Gyrase B and Hsp90. Structural analogies within this superfamily suggest that the P1 domain of CheA provides the nucleophilic histidine and activating glutamate for phosphotransfer. The regulatory domain, which binds the homologous receptor-coupling protein CheW, topologically resembles two SH3 domains and provides different protein recognition surfaces at each end. The dimerization domain forms a central four-helix bundle about which the kinase and regulatory domains pivot on conserved hinges to modulate transphosphorylation. Different subunit conformations suggest that relative domain motions link receptor response to kinase activity.
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==About this Structure==
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Structure of CheA, a signal-transducing histidine kinase.,Bilwes AM, Alex LA, Crane BR, Simon MI Cell. 1999 Jan 8;96(1):131-41. PMID:9989504<ref>PMID:9989504</ref>
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1B3Q is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Thermotoga_maritima Thermotoga maritima] with HG as [http://en.wikipedia.org/wiki/ligand ligand]. Full crystallographic information is available from [http://ispc.weizmann.ac.il/oca-bin/ocashort?id=1B3Q OCA].
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==Reference==
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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Structure of CheA, a signal-transducing histidine kinase., Bilwes AM, Alex LA, Crane BR, Simon MI, Cell. 1999 Jan 8;96(1):131-41. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=9989504 9989504]
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</div>
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[[Category: Single protein]]
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<div class="pdbe-citations 1b3q" style="background-color:#fffaf0;"></div>
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[[Category: Thermotoga maritima]]
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[[Category: Alex, L.A.]]
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[[Category: Bilwes, A.M.]]
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[[Category: Crane, B.R.]]
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[[Category: Simon, M.I.]]
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[[Category: HG]]
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[[Category: chemotaxis]]
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[[Category: histine kinase]]
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[[Category: multi-domains protein]]
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[[Category: signal transduction]]
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''Page seeded by [http://ispc.weizmann.ac.il/oca OCA ] on Tue Nov 20 11:19:48 2007''
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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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<references/>
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__TOC__
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</StructureSection>
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[[Category: Large Structures]]
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[[Category: Thermotoga maritima]]
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[[Category: Alex LA]]
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[[Category: Bilwes AM]]
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[[Category: Crane BR]]
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[[Category: Simon MI]]

Current revision

CRYSTAL STRUCTURE OF CHEA-289, A SIGNAL TRANSDUCING HISTIDINE KINASE

PDB ID 1b3q

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