Evaluation of 3- and 4-phenoxybenzamides as selective inhibitors of the Mono-ADP ribosyltransferase PARP10
Korn, Patricia; Classen, Arno; Murthy, Sudarshan; Guareschi, Riccardo; Maksimainen, Mirko M.; Lippok, Barbara E.; Galera-Prat, Albert; Sowa, Sven T.; Voigt, Catharina; Rossetti, Giulia; Lehtiö, Lari; Bolm, Carsten; Lüscher, Bernhard (2021-10-01)
P. Korn, A. Classen, S. Murthy, R. Guareschi, M. M. Maksimainen, B. E. Lippok, A. Galera-Prat, S. T. Sowa, C. Voigt, G. Rossetti, L. Lehtiö, C. Bolm, B. Lüscher, ChemistryOpen 2021, 10, 939, https://doi.org/10.1002/open.202100087
© 2021 The Authors. Published by Wiley-VCH GmbH. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.
https://creativecommons.org/licenses/by-nc/4.0/
https://urn.fi/URN:NBN:fi-fe2021121761478
Tiivistelmä
Abstract
Intracellular ADP-ribosyltransferases catalyze mono- and poly-ADP-ribosylation and affect a broad range of biological processes. The mono-ADP-ribosyltransferase PARP10 is involved in signaling and DNA repair. Previous studies identified OUL35 as a selective, cell permeable inhibitor of PARP10. We have further explored the chemical space of OUL35 by synthesizing and investigating structurally related analogs. Key synthetic steps were metal-catalyzed cross-couplings and functional group modifications. We identified 4-(4-cyanophenoxy)benzamide and 3-(4-carbamoylphenoxy)benzamide as PARP10 inhibitors with distinct selectivities. Both compounds were cell permeable and interfered with PARP10 toxicity. Moreover, both revealed some inhibition of PARP2 but not PARP1, unlike clinically used PARP inhibitors, which typically inhibit both enzymes. Using crystallography and molecular modeling the binding of the compounds to different ADP-ribosyltransferases was explored regarding selectivity. Together, these studies define additional compounds that interfere with PARP10 function and thus expand our repertoire of inhibitors to further optimize selectivity and potency.
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