2ara: Difference between revisions

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-[[Image:2ara.gif|left|200px]]<br /><applet load="2ara" size="450" color="white" frame="true" align="right" spinBox="true"
-caption="2ara, resolution 2.8&Aring;" />
-'''APO FORM OF ESCHERICHIA COLI REGULATORY PROTEIN ARAC'''<br />
-==Overview==
+==APO FORM OF ESCHERICHIA COLI REGULATORY PROTEIN ARAC==
-The crystal structure of the arabinose-binding and dimerization domain of, the Escherchia coli gene regulatory protein AraC was determined in the, presence and absence of L-arabinose. The 1.5 angstrom structure of the, arabinose-bound molecule shows that the protein adopts an unusual fold, binding sugar within a beta barrel and completely burying the arabinose, with the amino-terminal arm of the protein. Dimer contacts in the presence, of arabinose are mediated by an antiparallel coiled-coil. In the 2.8, angstrom structure of the uncomplexed protein, the amino-terminal arm is, disordered, uncovering the sugar-binding pocket and allowing it to serve, as an oligomerization interface. The ligand-gated oligomerization as seen, in AraC provides the basis of a plausible mechanism for modulating the, protein's DNA-looping properties.
+<StructureSection load='2ara' size='340' side='right'caption='[[2ara]], [[Resolution|resolution]] 2.80&Aring;' scene=''>
+== Structural highlights ==
+<table><tr><td colspan='2'>[[2ara]] 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=2ARA OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2ARA FirstGlance]. <br>
+</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.8&#8491;</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=2ara FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2ara OCA], [https://pdbe.org/2ara PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2ara RCSB], [https://www.ebi.ac.uk/pdbsum/2ara PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2ara ProSAT]</span></td></tr>
+</table>
+== Function ==
+[https://www.uniprot.org/uniprot/ARAC_ECOLI ARAC_ECOLI] This protein controls the expression of at least six genes that are involved in the transport and catabolism of L-arabinose. It regulates initiation of transcription of the araBAD operon and it also controls its own synthesis. The L-arabinose operon displays both positive and negative regulation through AraC.
+== Evolutionary Conservation ==
+[[Image:Consurf_key_small.gif|200px|right]]
+Check<jmol>
+  <jmolCheckbox>
+    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/ar/2ara_consurf.spt"</scriptWhenChecked>
+    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
+    <text>to colour the structure by Evolutionary Conservation</text>
+  </jmolCheckbox>
+</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=2ara ConSurf].
+<div style="clear:both"></div>
+<div style="background-color:#fffaf0;">
+== Publication Abstract from PubMed ==
+The crystal structure of the arabinose-binding and dimerization domain of the Escherchia coli gene regulatory protein AraC was determined in the presence and absence of L-arabinose. The 1.5 angstrom structure of the arabinose-bound molecule shows that the protein adopts an unusual fold, binding sugar within a beta barrel and completely burying the arabinose with the amino-terminal arm of the protein. Dimer contacts in the presence of arabinose are mediated by an antiparallel coiled-coil. In the 2.8 angstrom structure of the uncomplexed protein, the amino-terminal arm is disordered, uncovering the sugar-binding pocket and allowing it to serve as an oligomerization interface. The ligand-gated oligomerization as seen in AraC provides the basis of a plausible mechanism for modulating the protein's DNA-looping properties.
-==About this Structure==
+Structural basis for ligand-regulated oligomerization of AraC.,Soisson SM, MacDougall-Shackleton B, Schleif R, Wolberger C Science. 1997 Apr 18;276(5311):421-5. PMID:9103202<ref>PMID:9103202</ref>
-ARA is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. Full crystallographic information is available from [http://ispc.weizmann.ac.il/oca-bin/ocashort?id=2ARA OCA].
-==Reference==
+From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
-Structural basis for ligand-regulated oligomerization of AraC., Soisson SM, MacDougall-Shackleton B, Schleif R, Wolberger C, Science. 1997 Apr 18;276(5311):421-5. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=9103202 9103202]
+</div>
+<div class="pdbe-citations 2ara" style="background-color:#fffaf0;"></div>
+==See Also==
+*[[Transcriptional activator 3D structures|Transcriptional activator 3D structures]]
+== References ==
+<references/>
+__TOC__
+</StructureSection>
 [[Category: Escherichia coli]]
-[[Category: Single protein]]
+[[Category: Large Structures]]
-[[Category: Soisson, S.M.]]
+[[Category: Soisson SM]]
-[[Category: Wolberger, C.]]
+[[Category: Wolberger C]]
-[[Category: carbohydrate binding]]
-[[Category: coiled-coil]]
-[[Category: jelly-roll]]
-[[Category: transcription regulation]]
-''Page seeded by [http://ispc.weizmann.ac.il/oca OCA ] on Wed Nov 21 08:18:56 2007''