1amp: Difference between revisions
No edit summary |
No edit summary |
||
| Line 1: | Line 1: | ||
==CRYSTAL STRUCTURE OF AEROMONAS PROTEOLYTICA AMINOPEPTIDASE: A PROTOTYPICAL MEMBER OF THE CO-CATALYTIC ZINC ENZYME FAMILY== | ==CRYSTAL STRUCTURE OF AEROMONAS PROTEOLYTICA AMINOPEPTIDASE: A PROTOTYPICAL MEMBER OF THE CO-CATALYTIC ZINC ENZYME FAMILY== | ||
<StructureSection load='1amp' size='340' side='right' caption='[[1amp]], [[Resolution|resolution]] 1.80Å' scene=''> | <StructureSection load='1amp' size='340' side='right' caption='[[1amp]], [[Resolution|resolution]] 1.80Å' scene=''> | ||
| Line 5: | Line 6: | ||
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr> | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr> | ||
<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Bacterial_leucyl_aminopeptidase Bacterial leucyl aminopeptidase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.4.11.10 3.4.11.10] </span></td></tr> | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Bacterial_leucyl_aminopeptidase Bacterial leucyl aminopeptidase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.4.11.10 3.4.11.10] </span></td></tr> | ||
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1amp FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1amp OCA], [http://pdbe.org/1amp PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1amp RCSB], [http://www.ebi.ac.uk/pdbsum/1amp PDBsum]</span></td></tr> | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1amp FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1amp OCA], [http://pdbe.org/1amp PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1amp RCSB], [http://www.ebi.ac.uk/pdbsum/1amp PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1amp ProSAT]</span></td></tr> | ||
</table> | </table> | ||
== Evolutionary Conservation == | == Evolutionary Conservation == | ||
| Line 26: | Line 27: | ||
</div> | </div> | ||
<div class="pdbe-citations 1amp" style="background-color:#fffaf0;"></div> | <div class="pdbe-citations 1amp" style="background-color:#fffaf0;"></div> | ||
== References == | == References == | ||
<references/> | <references/> | ||
Revision as of 13:40, 15 November 2017
CRYSTAL STRUCTURE OF AEROMONAS PROTEOLYTICA AMINOPEPTIDASE: A PROTOTYPICAL MEMBER OF THE CO-CATALYTIC ZINC ENZYME FAMILYCRYSTAL STRUCTURE OF AEROMONAS PROTEOLYTICA AMINOPEPTIDASE: A PROTOTYPICAL MEMBER OF THE CO-CATALYTIC ZINC ENZYME FAMILY
Structural highlights
Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMedBACKGROUND: Aminopeptidases specifically cleave the amino-terminal residue from polypeptide chains and are involved in the metabolism of biologically active peptides. The family includes zinc-dependent enzymes possessing either one or two zinc ions per active site. Structural studies providing a detailed view of the metal environment may reveal whether the one-zinc and two-zinc enzymes constitute structurally and mechanistically distinct subclasses, and what role the metal ions play in the catalytic process. RESULTS: We have solved the crystal structure of the monomeric aminopeptidase from Aeromonas proteolytica at 1.8 A resolution. The protein is folded into a single alpha/beta globular domain. The active site contains two zinc ions (3.5 A apart) with shared ligands and symmetrical coordination spheres. We have compared it with the related bovine lens leucine aminopeptidase and the cobalt-containing Escherichia coli methionine aminopeptidase. CONCLUSIONS: The environment and coordination of the two zinc ions in A. proteolytica aminopeptidase strongly support the view that the two metal ions constitute a co-catalytic unit and play equivalent roles during catalysis. This conflicts with the conclusions drawn from the related bovine leucine aminopeptidase and early biochemical studies. In addition, the known specificity of the aminopeptidase for hydrophobic amino-terminal residues is reflected in the hydrophobicity of the active site cleft. Crystal structure of Aeromonas proteolytica aminopeptidase: a prototypical member of the co-catalytic zinc enzyme family.,Chevrier B, Schalk C, D'Orchymont H, Rondeau JM, Moras D, Tarnus C Structure. 1994 Apr 15;2(4):283-91. PMID:8087555[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References |
| ||||||||||||||||||