2vkv

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{{Seed}}
 
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[[Image:2vkv.png|left|200px]]
 
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==TetR (BD) variant L17G with reverse phenotype==
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The line below this paragraph, containing "STRUCTURE_2vkv", creates the "Structure Box" on the page.
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<StructureSection load='2vkv' size='340' side='right'caption='[[2vkv]], [[Resolution|resolution]] 1.74&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'>[[2vkv]] 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=2VKV OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2VKV FirstGlance]. <br>
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or leave the SCENE parameter empty for the default display.
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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]] 1.74&#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=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=TDC:5A,6-ANHYDROTETRACYCLINE'>TDC</scene></td></tr>
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{{STRUCTURE_2vkv| PDB=2vkv | SCENE= }}
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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=2vkv FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2vkv OCA], [https://pdbe.org/2vkv PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2vkv RCSB], [https://www.ebi.ac.uk/pdbsum/2vkv PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2vkv ProSAT]</span></td></tr>
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/TETR4_ECOLX TETR4_ECOLX] TetR is the repressor of the tetracycline resistance element; its N-terminal region forms a helix-turn-helix structure and binds DNA. Binding of tetracycline to TetR reduces the repressor affinity for the tetracycline resistance gene (tetA) promoter operator sites.
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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/vk/2vkv_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=2vkv 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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Today's proteome is the result of innumerous gene duplication, mutagenesis, drift and selection processes. Whereas random mutagenesis introduces predominantly only gradual changes in protein function, a case can be made that an abrupt switch in function caused by single amino acid substitutions will not only considerably further evolution but might constitute a prerequisite for the appearance of novel functionalities for which no promiscuous protein intermediates can be envisaged. Recently, tetracycline repressor (TetR) variants were identified in which binding of tetracycline triggers the repressor to associate with and not to dissociate from the operator DNA as in wild-type TetR. We investigated the origin of this activity reversal by limited proteolysis, CD spectroscopy and X-ray crystallography. We show that the TetR mutant Leu17Gly switches its function via a disorder-order mechanism that differs completely from the allosteric mechanism of wild-type TetR. Our study emphasizes how single point mutations can engender unexpected leaps in protein function thus enabling the appearance of new functionalities in proteins without the need for promiscuous intermediates.
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===TETR (BD) VARIANT L17G WITH REVERSE PHENOTYPE===
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A protein functional leap: how a single mutation reverses the function of the transcription regulator TetR.,Resch M, Striegl H, Henssler EM, Sevvana M, Egerer-Sieber C, Schiltz E, Hillen W, Muller YA Nucleic Acids Res. 2008 Aug;36(13):4390-401. Epub 2008 Jun 28. PMID:18587152<ref>PMID:18587152</ref>
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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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<div class="pdbe-citations 2vkv" style="background-color:#fffaf0;"></div>
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==About this Structure==
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==See Also==
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2VKV 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=2VKV OCA].
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*[[Tetracycline repressor protein 3D structures|Tetracycline repressor protein 3D structures]]
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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: Egerer-Sieber, C.]]
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[[Category: Egerer-Sieber C]]
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[[Category: Henssler, E M.]]
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[[Category: Henssler EM]]
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[[Category: Hillen, W.]]
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[[Category: Hillen W]]
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[[Category: Muller, Y A.]]
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[[Category: Muller YA]]
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[[Category: Resch, M.]]
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[[Category: Resch M]]
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[[Category: Schiltz, E.]]
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[[Category: Schiltz E]]
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[[Category: Sevvana, M.]]
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[[Category: Sevvana M]]
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[[Category: Striegl, H.]]
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[[Category: Striegl H]]
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[[Category: Anhydrotetracycline]]
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[[Category: Antibiotic resistance]]
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[[Category: Bacterial repressor]]
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[[Category: Disorder to order mechanism]]
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[[Category: Dna-binding]]
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[[Category: Helix-turn-helix motif]]
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[[Category: Magnesium]]
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[[Category: Metal-binding]]
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[[Category: Plasmid]]
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[[Category: Repressor]]
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[[Category: Reverse phenotype]]
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[[Category: Tetr]]
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[[Category: Transcription]]
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[[Category: Transcription regulation]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Wed Jul 30 09:30:46 2008''
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Current revision

TetR (BD) variant L17G with reverse phenotype

PDB ID 2vkv

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