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1sxg

From Proteopedia

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(New page: 200px<br /><applet load="1sxg" size="450" color="white" frame="true" align="right" spinBox="true" caption="1sxg, resolution 2.75&Aring;" /> '''Structural studies o...)
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[[Image:1sxg.gif|left|200px]]<br /><applet load="1sxg" size="450" color="white" frame="true" align="right" spinBox="true"
 
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caption="1sxg, resolution 2.75&Aring;" />
 
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'''Structural studies on the apo transcription factor form B. megaterium'''<br />
 
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==Overview==
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==Structural studies on the apo transcription factor form B. megaterium==
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Carbon catabolite repression (CCR) is one of the most fundamental, environmental-sensing mechanisms in bacteria and imparts competitive, advantage by establishing priorities in carbon metabolism. In, gram-positive bacteria, the master transcription regulator of CCR is CcpA., CcpA is a LacI-GalR family member that employs, as an allosteric, corepressor, the phosphoprotein HPr-Ser46-P, which is formed in, glucose-replete conditions. Here we report structures of the Bacillus, megaterium apoCcpA and a CcpA-(HPr-Ser46-P)-DNA complex. These structures, reveal that HPr-Ser46-P mediates a novel two-component allosteric DNA, binding activation mechanism that involves both rotation of the CcpA, subdomains and relocation of pivot-point residue Thr61, which leads to, juxtaposition of the DNA binding regions permitting "hinge" helix, formation in the presence of cognate DNA. The structure of the, CcpA-(HPr-Ser46-P)-cre complex also reveals the elegant mechanism by which, CcpA family-specific interactions with HPr-Ser46-P residues Ser46-P and, His15 partition the high-energy CCR and low-energy PTS pathways, the, latter requiring HPr-His15-P.
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<StructureSection load='1sxg' size='340' side='right'caption='[[1sxg]], [[Resolution|resolution]] 2.75&Aring;' scene=''>
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== Structural highlights ==
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<table><tr><td colspan='2'>[[1sxg]] is a 6 chain structure with sequence from [https://en.wikipedia.org/wiki/Priestia_megaterium Priestia megaterium]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1SXG OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1SXG 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=171:2-PHENYLAMINO-ETHANESULFONIC+ACID'>171</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=1sxg FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1sxg OCA], [https://pdbe.org/1sxg PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1sxg RCSB], [https://www.ebi.ac.uk/pdbsum/1sxg PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1sxg ProSAT]</span></td></tr>
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/CCPA_PRIMG CCPA_PRIMG] Global transcriptional regulator of carbon catabolite repression (CCR) and carbon catabolite activation (CCA), which ensures optimal energy usage under diverse conditions.
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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/sx/1sxg_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=1sxg ConSurf].
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<div style="clear:both"></div>
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==About this Structure==
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==See Also==
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1SXG is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Bacillus_megaterium Bacillus megaterium] with 171 as [http://en.wikipedia.org/wiki/ligand ligand]. Full crystallographic information is available from [http://ispc.weizmann.ac.il/oca-bin/ocashort?id=1SXG OCA].
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*[[Catabolite control protein 3D structures|Catabolite control protein 3D structures]]
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__TOC__
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==Reference==
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</StructureSection>
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Structural basis for allosteric control of the transcription regulator CcpA by the phosphoprotein HPr-Ser46-P., Schumacher MA, Allen GS, Diel M, Seidel G, Hillen W, Brennan RG, Cell. 2004 Sep 17;118(6):731-41. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=15369672 15369672]
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[[Category: Large Structures]]
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[[Category: Bacillus megaterium]]
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[[Category: Priestia megaterium]]
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[[Category: Single protein]]
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[[Category: Allen GS]]
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[[Category: Allen, G.S.]]
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[[Category: Brennan RG]]
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[[Category: Brennan, R.G.]]
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[[Category: Diel M]]
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[[Category: Diel, M.]]
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[[Category: Hillen W]]
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[[Category: Hillen, W.]]
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[[Category: Schumacher MA]]
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[[Category: Schumacher, M.A.]]
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[[Category: Seidel G]]
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[[Category: Seidel, G.]]
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[[Category: 171]]
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[[Category: allosterism; phosphoprotein; transcription regulation]]
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''Page seeded by [http://ispc.weizmann.ac.il/oca OCA ] on Wed Nov 21 02:49:01 2007''
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Current revision

Structural studies on the apo transcription factor form B. megaterium

PDB ID 1sxg

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