2h09

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[[Image:2h09.jpg|left|200px]]
 
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==Crystal structure of diphtheria toxin repressor like protein from E. coli==
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The line below this paragraph, containing "STRUCTURE_2h09", creates the "Structure Box" on the page.
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<StructureSection load='2h09' size='340' side='right'caption='[[2h09]], [[Resolution|resolution]] 2.10&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'>[[2h09]] 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=2H09 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2H09 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]] 2.1&#8491;</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=2h09 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2h09 OCA], [https://pdbe.org/2h09 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2h09 RCSB], [https://www.ebi.ac.uk/pdbsum/2h09 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2h09 ProSAT], [https://www.topsan.org/Proteins/RSGI/2h09 TOPSAN]</span></td></tr>
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{{STRUCTURE_2h09| PDB=2h09 | SCENE= }}
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</table>
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== Function ==
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'''Crystal structure of diphtheria toxin repressor like protein from E. coli'''
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[https://www.uniprot.org/uniprot/MNTR_ECOLI MNTR_ECOLI] In the presence of manganese, represses expression of mntH and mntS. Up-regulates expression of mntP.<ref>PMID:11466284</ref> <ref>PMID:21908668</ref>
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== Evolutionary Conservation ==
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[[Image:Consurf_key_small.gif|200px|right]]
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==Overview==
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Check<jmol>
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The virulent phenotype of the pathogenic bacterium Corynebacterium diphtheriae is conferred by diphtheria toxin, whose expression is an adaptive response to low concentrations of iron. The expression of the toxin gene (tox) is regulated by the repressor DtxR, which is activated by transition metal ions. X-ray crystal structures of DtxR with and without (apo-form) its coordinated transition metal ion have established the general architecture of the repressor, identified the location of the metal-binding sites, and revealed a metal-ion-triggered subunit-subunit 'caliper-like' conformational change. Here we report the three-dimensional crystal structure of the complex between a biologically active Ni(II)-bound DtxR(C102D) mutant, in which a cysteine is replaced by an aspartate at residue 102, and a 33-base-pair DNA segment containing the toxin operator toxO. This structure shows that DNA interacts with two dimeric repressor proteins bound to opposite sides of the tox operator. We propose that a metal-ion-induced helix-to-coil structural transition in the amino-terminal region of the protein is partly responsible for the unique mode of repressor activation by transition metal ions.
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<jmolCheckbox>
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<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/h0/2h09_consurf.spt"</scriptWhenChecked>
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==About this Structure==
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
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2H09 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=2H09 OCA].
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<text>to colour the structure by Evolutionary Conservation</text>
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</jmolCheckbox>
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==Reference==
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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=2h09 ConSurf].
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Structure of the metal-ion-activated diphtheria toxin repressor/tox operator complex., White A, Ding X, vanderSpek JC, Murphy JR, Ringe D, Nature. 1998 Jul 30;394(6692):502-6. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/9697776 9697776]
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<div style="clear:both"></div>
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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: Kumarevel, T S.]]
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[[Category: Kumarevel TS]]
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[[Category: RSGI, RIKEN Structural Genomics/Proteomics Initiative.]]
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[[Category: Shinkai A]]
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[[Category: Shinkai, A.]]
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[[Category: Tanaka T]]
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[[Category: Tanaka, T.]]
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[[Category: Yokoyama S]]
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[[Category: Yokoyama, S.]]
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[[Category: Diphtheria toxin]]
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[[Category: Manganese transport]]
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[[Category: National project on protein structural and functional analyse]]
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[[Category: Nppsfa]]
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[[Category: Riken structural genomics/proteomics initiative]]
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[[Category: Rsgi]]
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[[Category: Structural genomic]]
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[[Category: Transcription regulator]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun May 4 05:43:03 2008''
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Current revision

Crystal structure of diphtheria toxin repressor like protein from E. coli

PDB ID 2h09

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