1qwg: Difference between revisions

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-[[Image:1qwg.jpg|left|200px]]<br /><applet load="1qwg" size="350" color="white" frame="true" align="right" spinBox="true"
-caption="1qwg, resolution 1.60&Aring;" />
-'''Crystal structure of Methanococcus jannaschii phosphosulfolactate synthase'''<br />
-==Overview==
+==Crystal structure of Methanococcus jannaschii phosphosulfolactate synthase==
-Members of the enolase mechanistically diverse superfamily catalyze a wide variety of chemical reactions that are related by a common mechanistic feature, the abstraction of a proton adjacent to a carboxylate group. Recent investigations into the function and mechanism of the phosphosulfolactate synthase encoded by the ComA gene in Methanococcus jannaschii have suggested that ComA, which catalyzes the stereospecific Michael addition of sulfite to phosphoenolpyruvate to form phosphosulfolactate, may be a member of the enolase superfamily. The ComA-catalyzed reaction, the first step in the coenzyme M biosynthetic pathway, likely proceeds via a Mg2+ ion-stabilized enolate intermediate in a manner similar to that observed for members of the enolase superfamily. ComA, however, has no significant sequence similarity to any known enolase. Here we report the x-ray crystal structure of ComA to 1.7-A resolution. The overall fold for ComA is an (alpha/beta)8 barrel that assembles with two other ComA molecules to form a trimer in which three active sites are created at the subunit interfaces. From the positions of two ordered sulfate ions in the active site, a model for the binding of phosphoenolpyruvate and sulfite is proposed. Despite its mechanistic similarity to the enolase superfamily, the overall structure and active site architecture of ComA are unlike any member of the enolase superfamily, which suggests that ComA is not a member of the enolase superfamily but instead acquired an enolase-type mechanism through convergent evolution.
+<StructureSection load='1qwg' size='340' side='right'caption='[[1qwg]], [[Resolution|resolution]] 1.60&Aring;' scene=''>
+== Structural highlights ==
-==About this Structure==
+<table><tr><td colspan='2'>[[1qwg]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Methanocaldococcus_jannaschii Methanocaldococcus jannaschii]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1QWG OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1QWG FirstGlance]. <br>
-QWG is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Methanocaldococcus_jannaschii Methanocaldococcus jannaschii] with <scene name='pdbligand=SO4:'>SO4</scene> as [http://en.wikipedia.org/wiki/ligand ligand]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1QWG OCA].
+</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.6&#8491;</td></tr>
+<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr>
-==Reference==
+<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1qwg FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1qwg OCA], [https://pdbe.org/1qwg PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1qwg RCSB], [https://www.ebi.ac.uk/pdbsum/1qwg PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1qwg ProSAT]</span></td></tr>
-The structural determination of phosphosulfolactate synthase from Methanococcus jannaschii at 1.7-A resolution: an enolase that is not an enolase., Wise EL, Graham DE, White RH, Rayment I, J Biol Chem. 2003 Nov 14;278(46):45858-63. Epub 2003 Sep 2. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=12952952 12952952]
+</table>
+== Function ==
+[https://www.uniprot.org/uniprot/PSLS_METJA PSLS_METJA] Catalyzes the addition of sulfite to phosphoenolpyruvate (PEP) to yield (2R)-phospho-3-sulfolactate (PSL).
+== 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/qw/1qwg_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=1qwg ConSurf].
+<div style="clear:both"></div>
+__TOC__
+</StructureSection>
+[[Category: Large Structures]]
 [[Category: Methanocaldococcus jannaschii]]
-[[Category: Single protein]]
+[[Category: Graham DE]]
-[[Category: Graham, D E.]]
+[[Category: Rayment I]]
-[[Category: Rayment, I.]]
+[[Category: White RH]]
-[[Category: White, R H.]]
+[[Category: Wise EL]]
-[[Category: Wise, E L.]]
-[[Category: SO4]]
-[[Category: beta-alpha-barrel]]
-''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 14:44:25 2008''