View source for 7qgw


==Sulfonated Calpeptin is a promising drug candidate against SARS-CoV-2 infections==
<StructureSection load='7qgw' size='340' side='right'caption='[[7qgw]], [[Resolution|resolution]] 1.30&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[7qgw]] is a 2 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=7QGW OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=7QGW 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]] 1.3&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=MPD:(4S)-2-METHYL-2,4-PENTANEDIOL'>MPD</scene>, <scene name='pdbligand=RN2:(phenylmethyl)+~{N}-[(2~{S})-4-methyl-1-[[(2~{S})-1-oxidanylhexan-2-yl]amino]-1-oxidanylidene-pentan-2-yl]carbamate'>RN2</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=7qgw FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7qgw OCA], [https://pdbe.org/7qgw PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=7qgw RCSB], [https://www.ebi.ac.uk/pdbsum/7qgw PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=7qgw ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/CATL2_HUMAN CATL2_HUMAN] Cysteine protease. May have an important role in corneal physiology.<ref>PMID:9727401</ref> <ref>PMID:10029531</ref> 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Several drug screening campaigns identified Calpeptin as a drug candidate against SARS-CoV-2. Initially reported to target the viral main protease (M(pro)), its moderate activity in M(pro) inhibition assays hints at a second target. Indeed, we show that Calpeptin is an extremely potent cysteine cathepsin inhibitor, a finding additionally supported by X-ray crystallography. Cell infection assays proved Calpeptin's efficacy against SARS-CoV-2. Treatment of SARS-CoV-2-infected Golden Syrian hamsters with sulfonated Calpeptin at a dose of 1 mg/kg body weight reduces the viral load in the trachea. Despite a higher risk of side effects, an intrinsic advantage in targeting host proteins is their mutational stability in contrast to highly mutable viral targets. Here we show that the inhibition of cathepsins, a protein family of the host organism, by calpeptin is a promising approach for the treatment of SARS-CoV-2 and potentially other viral infections.

Calpeptin is a potent cathepsin inhibitor and drug candidate for SARS-CoV-2 infections.,Reinke PYA, de Souza EE, Gunther S, Falke S, Lieske J, Ewert W, Loboda J, Herrmann A, Rahmani Mashhour A, Karnicar K, Usenik A, Lindic N, Sekirnik A, Botosso VF, Santelli GMM, Kapronezai J, de Araujo MV, Silva-Pereira TT, Filho AFS, Tavares MS, Florez-Alvarez L, de Oliveira DBL, Durigon EL, Giaretta PR, Heinemann MB, Hauser M, Seychell B, Bohler H, Rut W, Drag M, Beck T, Cox R, Chapman HN, Betzel C, Brehm W, Hinrichs W, Ebert G, Latham SL, Guimaraes AMS, Turk D, Wrenger C, Meents A Commun Biol. 2023 Oct 18;6(1):1058. doi: 10.1038/s42003-023-05317-9. PMID:37853179<ref>PMID:37853179</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 7qgw" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Homo sapiens]]
[[Category: Large Structures]]
[[Category: Ewert W]]
[[Category: Falke S]]
[[Category: Guenther S]]
[[Category: Karnicar K]]
[[Category: Lieske J]]
[[Category: Lindic N]]
[[Category: Loboda J]]
[[Category: Meents A]]
[[Category: Reinke PYA]]
[[Category: Turk D]]
[[Category: Usenik A]]