1trr

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(New page: 200px<br /><applet load="1trr" size="450" color="white" frame="true" align="right" spinBox="true" caption="1trr, resolution 2.400&Aring;" /> '''TANDEM BINDING IN C...)
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[[Image:1trr.gif|left|200px]]<br /><applet load="1trr" size="450" color="white" frame="true" align="right" spinBox="true"
 
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caption="1trr, resolution 2.400&Aring;" />
 
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'''TANDEM BINDING IN CRYSTALS OF A TRP REPRESSOR/OPERATOR HALF-SITE COMPLEX'''<br />
 
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==Overview==
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==TANDEM BINDING IN CRYSTALS OF A TRP REPRESSOR/OPERATOR HALF-SITE COMPLEX==
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The crystal structure of trp repressor tandemly bound in a 2:1 complex to, a 16-base-pair palindromic DNA containing a central trp operator half-site, has been determined and refined to 2.4 A resolution. Despite dramatically, different DNA sequence contexts and crystallization conditions, the, protein/DNA interface is essentially identical to that seen in the, original trp repressor/operator complex structure. Water-mediated sequence, recognition by trp repressor is likely to be related to the unusual end-on, approach of the recognition helix (E), which allows sharing of the major, groove by tandem dimers. The tandem complex model accounts for the, mutational sensitivity of all trp operator base pairs. The structure also, provides the first detailed view of the tandem interaction, revealing a, key role for the amino-terminal arms.
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<StructureSection load='1trr' size='340' side='right'caption='[[1trr]], [[Resolution|resolution]] 2.40&Aring;' scene=''>
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== Structural highlights ==
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==About this Structure==
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<table><tr><td colspan='2'>[[1trr]] is a 12 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=1TRR OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1TRR FirstGlance]. <br>
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1TRR is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli] with TRP as [http://en.wikipedia.org/wiki/ligand ligand]. Full crystallographic information is available from [http://ispc.weizmann.ac.il/oca-bin/ocashort?id=1TRR OCA].
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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]] 2.4&#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=TRP:TRYPTOPHAN'>TRP</scene></td></tr>
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==Reference==
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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=1trr FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1trr OCA], [https://pdbe.org/1trr PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1trr RCSB], [https://www.ebi.ac.uk/pdbsum/1trr PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1trr ProSAT]</span></td></tr>
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Tandem binding in crystals of a trp repressor/operator half-site complex., Lawson CL, Carey J, Nature. 1993 Nov 11;366(6451):178-82. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=8232559 8232559]
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/TRPR_ECOLI TRPR_ECOLI] This protein is an aporepressor. When complexed with L-tryptophan it binds the operator region of the trp operon (5'-ACTAGT-'3') and prevents the initiation of transcription. The complex also regulates trp repressor biosynthesis by binding to its regulatory region.
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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/tr/1trr_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=1trr ConSurf].
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<div style="clear:both"></div>
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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: Carey, J.]]
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[[Category: Carey J]]
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[[Category: Lawson, C.L.]]
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[[Category: Lawson CL]]
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[[Category: TRP]]
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[[Category: protein-dna complex]]
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''Page seeded by [http://ispc.weizmann.ac.il/oca OCA ] on Wed Nov 21 03:32:46 2007''
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Current revision

TANDEM BINDING IN CRYSTALS OF A TRP REPRESSOR/OPERATOR HALF-SITE COMPLEX

PDB ID 1trr

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