3fxr: Difference between revisions
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==Crystal structure of TsaR in complex with sulfate== | ==Crystal structure of TsaR in complex with sulfate== | ||
<StructureSection load='3fxr' size='340' side='right' caption='[[3fxr]], [[Resolution|resolution]] 2.50Å' scene=''> | <StructureSection load='3fxr' size='340' side='right'caption='[[3fxr]], [[Resolution|resolution]] 2.50Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[3fxr]] is a 2 chain structure with sequence from [ | <table><tr><td colspan='2'>[[3fxr]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Comamonas_testosteroni Comamonas testosteroni]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3FXR OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3FXR FirstGlance]. <br> | ||
</td></tr><tr id=' | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.5Å</td></tr> | ||
<tr id=' | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ASC:ASCORBIC+ACID'>ASC</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr> | ||
< | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=3fxr FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3fxr OCA], [https://pdbe.org/3fxr PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3fxr RCSB], [https://www.ebi.ac.uk/pdbsum/3fxr PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3fxr ProSAT]</span></td></tr> | ||
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[ | |||
</table> | </table> | ||
== Function == | |||
[https://www.uniprot.org/uniprot/TSAR_COMTE TSAR_COMTE] Regulates expression of the tsaMBCD1 operon and of tsaT in response to p-toluenesulfonate (TSA). Acts by binding directly to the promoter region. Binding to the tsa promoter depends on TSA concentration.<ref>PMID:12676713</ref> <ref>PMID:13680097</ref> | |||
== Evolutionary Conservation == | == Evolutionary Conservation == | ||
[[Image:Consurf_key_small.gif|200px|right]] | [[Image:Consurf_key_small.gif|200px|right]] | ||
Check<jmol> | Check<jmol> | ||
<jmolCheckbox> | <jmolCheckbox> | ||
<scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/fx/3fxr_consurf.spt"</scriptWhenChecked> | <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/fx/3fxr_consurf.spt"</scriptWhenChecked> | ||
<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked> | <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked> | ||
<text>to colour the structure by Evolutionary Conservation</text> | <text>to colour the structure by Evolutionary Conservation</text> | ||
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__TOC__ | __TOC__ | ||
</StructureSection> | </StructureSection> | ||
[[Category: | [[Category: Comamonas testosteroni]] | ||
[[Category: Kertesz | [[Category: Large Structures]] | ||
[[Category: Kikhney | [[Category: Kertesz MA]] | ||
[[Category: Monferrer | [[Category: Kikhney A]] | ||
[[Category: Svergun | [[Category: Monferrer D]] | ||
[[Category: Tralau | [[Category: Svergun D]] | ||
[[Category: Uson | [[Category: Tralau T]] | ||
[[Category: Uson I]] | |||
Latest revision as of 18:33, 1 November 2023
Crystal structure of TsaR in complex with sulfateCrystal structure of TsaR in complex with sulfate
Structural highlights
FunctionTSAR_COMTE Regulates expression of the tsaMBCD1 operon and of tsaT in response to p-toluenesulfonate (TSA). Acts by binding directly to the promoter region. Binding to the tsa promoter depends on TSA concentration.[1] [2] Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMedLysR-type transcriptional regulators (LTTRs) constitute the largest family of regulators in prokaryotes. The full-length structures of the LTTR TsaR from Comamonas testosteroni T-2 and its complex with the natural inducer para-toluensulfonate have been characterized by X-ray diffraction. Both ligand-free and complexed forms reveal a dramatically different quaternary structure from that of CbnR from Ralstonia eutropha, or a putative LysR-type regulator from Pseudomonas aeruginosa, the only other determined full-length structures of tetrameric LTTRs. Although all three show a head-to-head tetrameric ring, TsaR displays an open conformation, whereas CbnR and PA01-PR present additional contacts in opposing C-terminal domains that close the ring. Such large differences may be due to a broader structural versatility than previously assumed or either, reflect the intrinsic flexibility of tetrameric LTTRs. On the grounds of the sliding dimer hypothesis of LTTR activation, we propose a structural model in which the closed structures could reflect the conformation of a ligand-free LTTR, whereas inducer binding would bring about local changes to disrupt the interface linking the two compact C-terminal domains. This could lead to a TsaR-like, open structure, where the pairs of recognition helices are closer to each other by more than 10 A. Structural studies on the full-length LysR-type regulator TsaR from Comamonas testosteroni T-2 reveal a novel open conformation of the tetrameric LTTR fold.,Monferrer D, Tralau T, Kertesz MA, Dix I, Sola M, Uson I Mol Microbiol. 2010 Mar;75(5):1199-214. Epub 2010 Jan 5. PMID:20059681[3] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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