Evaluation of dipeptide nitriles as inhibitors of rhodesain, a major cysteine protease of Trypanosoma brucei

• Verfasst von: Schirmeister, Tanja [VerfasserIn]
• Verfasst von: Schmenger, Torsten [VerfasserIn]
• Verfasst von: Krauth-Siegel, Renate [VerfasserIn]
• Titel: Evaluation of dipeptide nitriles as inhibitors of rhodesain, a major cysteine protease of Trypanosoma brucei
• Verf.angabe: Tanja Schirmeister, Janina Schmitz, Sascha Jung, Torsten Schmenger, R. Luise Krauth-Siegel, Michael Gütschow
• Jahr: 2017
• Umfang: 6 S.
• Fussnoten: Online veröffentlicht am 15. November 2016 ; Gesehen am 08.05.2018
• Titel Quelle: Enthalten in: Bioorganic & medicinal chemistry letters
• Ort Quelle: Amsterdam [u.a.] : Elsevier Science, 1991
• Jahr Quelle: 2017
• Band/Heft Quelle: 27(2017), 1, Seite 45-50
• ISSN Quelle: 1464-3405
• DOI: doi:10.1016/j.bmcl.2016.11.036
• Datenträger: Online-Ressource
• Sprache: eng
• Sach-SW: Cysteine protease
• Sach-SW: Dipeptide nitrile
• Sach-SW: Inhibitor
• Sach-SW: Rhodesain
• Sach-SW: Trypanosoma
• K10plus-PPN: 1574249657

Abstract

A series of dipeptide nitriles known as inhibitors of mammalian cathepsins were evaluated for inhibition of rhodesain, the cathepsin L-like protease of Trypanosoma brucei. Compound 35 consisting of a Leu residue fitting into the S2 pocket and a triarylic moiety consisting of thiophene, a 1,2,4-oxadiazole and a phenyl ring fitting into the S3 pocket, and compound 33 with a 3-bromo-Phe residue (S2) and a biphenyl fragment (S3) were found to inhibit rhodesain in the single-digit nanomolar range. The observed steep structure-activity relationship could be explained by covalent docking simulations. With their high selectivity indices (ca. 200) and the good antitrypanosomal activity (8μM) the compounds represent promising starting points for new rhodesain inhibitors.