Inhibitor-induced dimerization of an essential oxidoreductase from african trypanosomes

• Verfasst von: Wagner, Annika [VerfasserIn]
• Verfasst von: Dirdjaja, Natalie [VerfasserIn]
• Verfasst von: Krauth-Siegel, Renate [VerfasserIn]
• Titel: Inhibitor-induced dimerization of an essential oxidoreductase from african trypanosomes
• Verf.angabe: Annika Wagner, Thien Anh Le, Martha Brennich, Philipp Klein, Nicole Bader, Erika Diehl, Daniel Paszek, A. Katharina Weickhmann, Natalie Dirdjaja, R. Luise Krauth‐Siegel, Bernd Engels, Till Opatz, Hermann Schindelin, and Ute A. Hellmich
• E-Jahr: 2019
• Jahr: 03 January 2019
• Umfang: 5 S.
• Fussnoten: Gesehen am 27.05.2019
• Titel Quelle: Enthalten in: Angewandte Chemie / International edition
• Ort Quelle: Weinheim : Wiley-VCH, 1962
• Jahr Quelle: 2019
• Band/Heft Quelle: 58(2019), 11, Seite 3640-3644
• ISSN Quelle: 1521-3773
• DOI: doi:10.1002/anie.201810470
• Datenträger: Online-Ressource
• Sprache: eng
• Sach-SW: African trypanosomes
• Sach-SW: chemically induced dimerization (CID)
• Sach-SW: covalent inhibitor
• Sach-SW: oxidoreductase
• Sach-SW: tryparedoxin
• K10plus-PPN: 1666337528

Abstract

Trypanosomal and leishmanial infections claim tens of thousands of lives each year. The metabolism of these unicellular eukaryotic parasites differs from the human host and their enzymes thus constitute promising drug targets. Tryparedoxin (Tpx) from Trypanosoma brucei is the essential oxidoreductase in the parasite's hydroperoxide-clearance cascade. In vitro and in vivo functional assays show that a small, selective inhibitor efficiently inhibits Tpx. With X-ray crystallography, SAXS, analytical SEC, SEC-MALS, MD simulations, ITC, and NMR spectroscopy, we show how covalent binding of this monofunctional inhibitor leads to Tpx dimerization. Intra- and intermolecular inhibitor-inhibitor, protein-protein, and inhibitor-protein interactions stabilize the dimer. The behavior of this efficient antitrypanosomal molecule thus constitutes an exquisite example of chemically induced dimerization with a small, monovalent ligand that can be exploited for future drug design.