3e4q

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[[Image:3e4q.png|left|200px]]
 
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{{STRUCTURE_3e4q| PDB=3e4q | SCENE= }}
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==Crystal structure of apo DctB==
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<StructureSection load='3e4q' size='340' side='right'caption='[[3e4q]], [[Resolution|resolution]] 2.75&Aring;' scene=''>
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== Structural highlights ==
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<table><tr><td colspan='2'>[[3e4q]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Sinorhizobium_meliloti Sinorhizobium meliloti]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3E4Q OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3E4Q 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]] 2.75&#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=CA:CALCIUM+ION'>CA</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=3e4q FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3e4q OCA], [https://pdbe.org/3e4q PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3e4q RCSB], [https://www.ebi.ac.uk/pdbsum/3e4q PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3e4q ProSAT]</span></td></tr>
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/DCTB_RHIME DCTB_RHIME] Member of the two-component regulatory system DctB/DctD involved in the transport of C4-dicarboxylates. DctB functions as a membrane-associated protein kinase that phosphorylates DctD in response to environmental signals.
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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/e4/3e4q_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=3e4q 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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C(4)-dicarboxylates are the major carbon and energy sources during the symbiotic growth of rhizobia. Responses to C(4)-dicarboxylates depend on typical two-component systems (TCS) consisting of a transmembrane sensor histidine kinase and a cytoplasmic response regulator. The DctB-DctD system is the first identified TCS for C(4)-dicarboxylates sensing. Direct ligand binding to the sensor domain of DctB is believed to be the first step of the sensing events. In this report, the water-soluble periplasmic sensor domain of Sinorhizobium meliloti DctB (DctBp) was studied, and three crystal structures were solved: the apo protein, a complex with C(4) succinate, and a complex with C(3) malonate. Different from the two structurally known CitA family of carboxylate sensor proteins CitA and DcuS, the structure of DctBp consists of two tandem Per-Arnt-Sim (PAS) domains and one N-terminal helical region. Only the membrane-distal PAS domain was found to bind the ligands, whereas the proximal PAS domain was empty. Comparison of DctB, CitA, and DcuS suggests a detailed stereochemistry of C(4)-dicarboxylates ligand perception. The structures of the different ligand binding states of DctBp also revealed a series of conformational changes initiated upon ligand binding and propagated to the N-terminal domain responsible for dimerization, providing insights into understanding the detailed mechanism of the signal transduction of TCS histidine kinases.
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===Crystal structure of apo DctB===
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C4-dicarboxylates sensing mechanism revealed by the crystal structures of DctB sensor domain.,Zhou YF, Nan B, Nan J, Ma Q, Panjikar S, Liang YH, Wang Y, Su XD J Mol Biol. 2008 Oct 31;383(1):49-61. Epub 2008 Aug 12. PMID:18725229<ref>PMID:18725229</ref>
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{{ABSTRACT_PUBMED_18725229}}
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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</div>
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==About this Structure==
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<div class="pdbe-citations 3e4q" style="background-color:#fffaf0;"></div>
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[[3e4q]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Sinorhizobium_meliloti Sinorhizobium meliloti]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3E4Q OCA].
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== References ==
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<references/>
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==Reference==
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__TOC__
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<ref group="xtra">PMID:018725229</ref><references group="xtra"/>
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</StructureSection>
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[[Category: Histidine kinase]]
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[[Category: Large Structures]]
[[Category: Sinorhizobium meliloti]]
[[Category: Sinorhizobium meliloti]]
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[[Category: Liang, Y H.]]
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[[Category: Liang YH]]
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[[Category: Nan, B Y.]]
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[[Category: Nan BY]]
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[[Category: Nan, J.]]
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[[Category: Nan J]]
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[[Category: Panjikar, S.]]
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[[Category: Panjikar S]]
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[[Category: Su, X D.]]
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[[Category: Su XD]]
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[[Category: Zhou, Y F.]]
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[[Category: Zhou YF]]
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[[Category: N-term helical dimerization domain]]
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[[Category: Pas domain]]
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[[Category: Transferase]]
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Current revision

Crystal structure of apo DctB

PDB ID 3e4q

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