1ekj: Difference between revisions

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New page: left|200px<br /><applet load="1ekj" size="450" color="white" frame="true" align="right" spinBox="true" caption="1ekj, resolution 1.93Å" /> '''THE X-RAY CRYSTALLOG...
 
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[[Image:1ekj.gif|left|200px]]<br /><applet load="1ekj" size="450" 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==
1EKJ 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 ACT, AZI, ZN, CU, CL, CIT and EDO 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://ispc.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: 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://ispc.weizmann.ac.il/oca OCA ] on Tue Nov 20 14:04:53 2007''

Latest revision as of 10:03, 7 February 2024

THE X-RAY CRYSTALLOGRAPHIC STRUCTURE OF BETA CARBONIC ANHYDRASE FROM THE C3 DICOT PISUM SATIVUMTHE X-RAY CRYSTALLOGRAPHIC STRUCTURE OF BETA CARBONIC ANHYDRASE FROM THE C3 DICOT PISUM SATIVUM

Structural highlights

1ekj is a 8 chain structure with sequence from Pisum sativum. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:X-ray diffraction, Resolution 1.93Å
Ligands:, , , , , ,
Resources:FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

CAHC_PEA Reversible hydration of carbon dioxide.

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

See Also

1ekj, resolution 1.93Å

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