3of8: Difference between revisions
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==Structural Basis for Reversible and Irreversible Inhibition of Human Cathepsin L by their Respective Dipeptidyl Glyoxal and Diazomethylketone Inhibitors== | ==Structural Basis for Reversible and Irreversible Inhibition of Human Cathepsin L by their Respective Dipeptidyl Glyoxal and Diazomethylketone Inhibitors== | ||
<StructureSection load='3of8' size='340' side='right' caption='[[3of8]], [[Resolution|resolution]] 2.20Å' scene=''> | <StructureSection load='3of8' size='340' side='right'caption='[[3of8]], [[Resolution|resolution]] 2.20Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[3of8]] is a 1 chain structure with sequence from [ | <table><tr><td colspan='2'>[[3of8]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3OF8 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3OF8 FirstGlance]. <br> | ||
</td></tr><tr id=' | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.2Å</td></tr> | ||
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=I0Y:NALPHA-[(BENZYLOXY)CARBONYL]-N-[(2S)-1-(4-TERT-BUTOXYPHENYL)-4-HYDROXY-3-OXOBUTAN-2-YL]-L-PHENYLALANINAMIDE'>I0Y</scene></td></tr> | |||
<tr id=' | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=3of8 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3of8 OCA], [https://pdbe.org/3of8 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3of8 RCSB], [https://www.ebi.ac.uk/pdbsum/3of8 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3of8 ProSAT]</span></td></tr> | ||
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[ | |||
</table> | </table> | ||
== Function == | == Function == | ||
[ | [https://www.uniprot.org/uniprot/CATL1_HUMAN CATL1_HUMAN] Important for the overall degradation of proteins in lysosomes. | ||
<div style="background-color:#fffaf0;"> | <div style="background-color:#fffaf0;"> | ||
== Publication Abstract from PubMed == | == Publication Abstract from PubMed == | ||
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==See Also== | ==See Also== | ||
*[[Cathepsin|Cathepsin]] | *[[Cathepsin 3D structures|Cathepsin 3D structures]] | ||
== References == | == References == | ||
<references/> | <references/> | ||
__TOC__ | __TOC__ | ||
</StructureSection> | </StructureSection> | ||
[[Category: | [[Category: Homo sapiens]] | ||
[[Category: | [[Category: Large Structures]] | ||
[[Category: Shenoy | [[Category: Shenoy RT]] | ||
[[Category: Sivaraman | [[Category: Sivaraman J]] | ||
Latest revision as of 12:37, 6 September 2023
Structural Basis for Reversible and Irreversible Inhibition of Human Cathepsin L by their Respective Dipeptidyl Glyoxal and Diazomethylketone InhibitorsStructural Basis for Reversible and Irreversible Inhibition of Human Cathepsin L by their Respective Dipeptidyl Glyoxal and Diazomethylketone Inhibitors
Structural highlights
FunctionCATL1_HUMAN Important for the overall degradation of proteins in lysosomes. Publication Abstract from PubMedCathepsin L plays a key role in many pathophysiological conditions including rheumatoid arthritis, tumor invasion and metastasis, bone resorption and remodeling. Here we report the crystal structures of two analogous dipeptidyl inhibitor complexes which inhibit human cathepsin L in reversible and irreversible modes, respectively. To-date, there are no crystal structure reports of complexes of proteases with their glyoxal inhibitors or complexes of cathepsin L and their diazomethylketone inhibitors. These two inhibitors - inhibitor 1, an alpha-keto-beta-aldehyde and inhibitor 2, a diazomethylketone, have different groups in the S1 subsite. Inhibitor 1 [Z-Phe-Tyr (OBut)-COCHO], with a K(i) of 0.6nM, is the most potent, reversible, synthetic peptidyl inhibitor of cathepsin L reported to-date. The structure of the inhibitor 1 complex was refined up to 2.2A resolution. The structure of the complex of the inhibitor 2 [Z-Phe-Tyr (t-Bu)-diazomethylketone], an irreversible inhibitor that can inactivate cathepsin L at muM concentrations, was refined up to 1.76A resolution. These two inhibitors have substrate-like interactions with the active site cysteine (Cys25). Inhibitor 1 forms a tetrahedral hemithioacetal adduct, whereas the inhibitor 2 forms a thioester with Cys25. The inhibitor 1 beta-aldehyde group is shown to make a hydrogen bond with catalytic His163, whereas the ketone carbonyl oxygen of the inhibitor 2 interacts with the oxyanion hole. tert-Butyl groups of both inhibitors are found to make several non-polar contacts with S' subsite residues of cathepsin L. These studies, combined with other complex structures of cathepsin L, reveal the structural basis for their potency and selectivity. Structural basis for reversible and irreversible inhibition of human cathepsin L by their respective dipeptidyl glyoxal and diazomethylketone inhibitors.,Shenoy RT, Sivaraman J J Struct Biol. 2010 Sep 17. PMID:20850545[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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