View source for 1cbx


==CRYSTAL STRUCTURE OF THE COMPLEX BETWEEN CARBOXYPEPTIDASE A AND THE BIPRODUCT ANALOG INHIBITOR L-BENZYLSUCCINATE AT 2.0 ANGSTROMS RESOLUTION==
<StructureSection load='1cbx' size='340' side='right'caption='[[1cbx]], [[Resolution|resolution]] 2.00&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[1cbx]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Bos_taurus Bos taurus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1CBX OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1CBX 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&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=BZS:L-BENZYLSUCCINIC+ACID'>BZS</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=1cbx FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1cbx OCA], [https://pdbe.org/1cbx PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1cbx RCSB], [https://www.ebi.ac.uk/pdbsum/1cbx PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1cbx ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/CBPA1_BOVIN CBPA1_BOVIN] Carboxypeptidase that catalyzes the release of a C-terminal amino acid, but has little or no action with -Asp, -Glu, -Arg, -Lys or -Pro (By similarity).
== 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/cb/1cbx_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview03.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=1cbx ConSurf].
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== Publication Abstract from PubMed ==
The X-ray crystal structure of the carboxypeptidase A-L-benzylsuccinate complex has been refined at 2.0 A resolution to a final R-factor of 0.166. One molecule of the inhibitor binds to the enzyme active site. The terminal carboxylate forms a salt link with the guanidinium group of Arg145 and hydrogen bonds with Tyr248 and Asn144. The second carboxylate group binds to the zinc ion in an asymmetric bidentate fashion replacing the water molecule of the native structure. The zinc ion moves 0.5 A from its position in the native structure to accommodate the inhibitor binding. The overall stereochemistry around the zinc can be considered a distorted tetrahedron, although six atoms of the co-ordinated groups lie within 3.0 A from the zinc ion. The key for the strong inhibitory properties of L-benzylsuccinate can be found in its ability both to co-ordinate the zinc and to form a short carboxyl-carboxylate-type hydrogen bond (2.5 A) with Glu270.

Crystal structure of the complex between carboxypeptidase A and the biproduct analog inhibitor L-benzylsuccinate at 2.0 A resolution.,Mangani S, Carloni P, Orioli P J Mol Biol. 1992 Jan 20;223(2):573-8. PMID:1738164<ref>PMID:1738164</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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<div class="pdbe-citations 1cbx" style="background-color:#fffaf0;"></div>

==See Also==
*[[Carboxypeptidase 3D structures|Carboxypeptidase 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Bos taurus]]
[[Category: Large Structures]]
[[Category: Carloni P]]
[[Category: Mangani S]]
[[Category: Orioli P]]