1ekj: Difference between revisions

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-[[Image:1ekj.gif|left|200px]]<br /><applet load="1ekj" size="350" color="white" frame="true" align="right" spinBox="true"
-caption="1ekj, resolution 1.93&Aring;" />
-'''THE X-RAY CRYSTALLOGRAPHIC STRUCTURE OF BETA CARBONIC ANHYDRASE FROM THE C3 DICOT PISUM SATIVUM'''<br />
-==Overview==
+==THE X-RAY CRYSTALLOGRAPHIC STRUCTURE OF BETA CARBONIC ANHYDRASE FROM THE C3 DICOT PISUM SATIVUM==
-We have determined the structure of the beta-carbonic anhydrase from the dicotyledonous plant Pisum sativum at 1.93 A resolution, using a combination of multiple anomalous scattering off the active site zinc ion and non-crystallographic symmetry averaging. The mol- ecule assembles as an octamer with a novel dimer of dimers of dimers arrangement. Two distinct patterns of conservation of active site residues are observed, implying two potentially mechanistically distinct classes of beta-carbonic anhydrases. The active site is located at the interface between two monomers, with Cys160, His220 and Cys223 binding the catalytic zinc ion and residues Asp162 (oriented by Arg164), Gly224, Gln151, Val184, Phe179 and Tyr205 interacting with the substrate analogue, acetic acid. The substrate binding groups have a one to one correspondence with the functional groups in the alpha-carbonic anhydrase active site, with the corresponding residues being closely superimposable by a mirror plane. Therefore, despite differing folds, alpha- and beta-carbonic anhydrase have converged upon a very similar active site design and are likely to share a common mechanism.
+<StructureSection load='1ekj' size='340' side='right'caption='[[1ekj]], [[Resolution|resolution]] 1.93&Aring;' scene=''>
+== Structural highlights ==
+<table><tr><td colspan='2'>[[1ekj]] is a 8 chain structure with sequence from [https://en.wikipedia.org/wiki/Pisum_sativum Pisum sativum]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1EKJ OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1EKJ 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]] 1.93&#8491;</td></tr>
+<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ACT:ACETATE+ION'>ACT</scene>, <scene name='pdbligand=AZI:AZIDE+ION'>AZI</scene>, <scene name='pdbligand=CIT:CITRIC+ACID'>CIT</scene>, <scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=CU:COPPER+(II)+ION'>CU</scene>, <scene name='pdbligand=EDO:1,2-ETHANEDIOL'>EDO</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></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=1ekj FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1ekj OCA], [https://pdbe.org/1ekj PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1ekj RCSB], [https://www.ebi.ac.uk/pdbsum/1ekj PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1ekj ProSAT]</span></td></tr>
+</table>
+== Function ==
+[https://www.uniprot.org/uniprot/CAHC_PEA CAHC_PEA] Reversible hydration of carbon dioxide.
+== 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/ek/1ekj_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=1ekj ConSurf].
+<div style="clear:both"></div>
-==About this Structure==
+==See Also==
-EKJ is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Pisum_sativum Pisum sativum] with <scene name='pdbligand=ACT:'>ACT</scene>, <scene name='pdbligand=AZI:'>AZI</scene>, <scene name='pdbligand=ZN:'>ZN</scene>, <scene name='pdbligand=CU:'>CU</scene>, <scene name='pdbligand=CL:'>CL</scene>, <scene name='pdbligand=CIT:'>CIT</scene> and <scene name='pdbligand=EDO:'>EDO</scene> as [http://en.wikipedia.org/wiki/ligands ligands]. Active as [http://en.wikipedia.org/wiki/Carbonate_dehydratase Carbonate dehydratase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=4.2.1.1 4.2.1.1] Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1EKJ OCA].
+*[[Carbonic anhydrase 3D structures|Carbonic anhydrase 3D structures]]
+__TOC__
-==Reference==
+</StructureSection>
-The active site architecture of Pisum sativum beta-carbonic anhydrase is a mirror image of that of alpha-carbonic anhydrases., Kimber MS, Pai EF, EMBO J. 2000 Apr 3;19(7):1407-18. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=10747009 10747009]
+[[Category: Large Structures]]
-[[Category: Carbonate dehydratase]]
 [[Category: Pisum sativum]]
-[[Category: Single protein]]
+[[Category: Kimber MS]]
-[[Category: Kimber, M S.]]
+[[Category: Pai EF]]
-[[Category: Pai, E F.]]
-[[Category: ACT]]
-[[Category: AZI]]
-[[Category: CIT]]
-[[Category: CL]]
-[[Category: CU]]
-[[Category: EDO]]
-[[Category: ZN]]
-[[Category: rossman fold domain]]
-[[Category: strand exchange]]
-''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 12:28:42 2008''