Towards small molecule inhibitors of mono-ADP-ribosyltransferases
作者:Torun Ekblad、Anders E.G. Lindgren、C. David Andersson、Rémi Caraballo、Ann-Gerd Thorsell、Tobias Karlberg、Sara Spjut、Anna Linusson、Herwig Schüler、Mikael Elofsson
DOI:10.1016/j.ejmech.2015.03.067
日期:2015.5
Protein ADP-ribosylation is a post-translational modification involved in DNA repair, protein degradation, transcription regulation, and epigenetic events. Intracellular ADP-ribosylation is catalyzed predominantly by ADP-ribosyltransferases with diphtheria toxin homology (ARTDs). The most prominent member of the ARTD family, poly(ADP-ribose) polymerase-1 (ARTD1/PARP1) has been a target for cancer drug development for decades. Current PARP inhibitors are generally non-selective, and inhibit the mono-ADP-ribosyltransferases with low potency. Here we describe the synthesis of acylated amino benzamides and screening against the mono-ADP-ribosyltransferases ARTD7/PARP15, ARTD8/PARP14, ARTD10/PARP10, and the poly-ADP-ribosyltransferase ARTD1/PARP1. The most potent compound inhibits ARTD10 with sub-micromolar IC50. (C) 2015 The Authors. Published by Elsevier Masson SAS.
Discovery of Ligands for ADP-Ribosyltransferases via Docking-Based Virtual Screening
作者:C. David Andersson、Tobias Karlberg、Torun Ekblad、Anders E. G. Lindgren、Ann-Gerd Thorsell、Sara Spjut、Urszula Uciechowska、Moritz S. Niemiec、Pernilla Wittung-Stafshede、Johan Weigelt、Mikael Elofsson、Herwig Schüler、Anna Linusson
DOI:10.1021/jm300746d
日期:2012.9.13
The diphtheria toxin-like ADP-ribosyltransferases (ARTDs) are an enzyme family that catalyzes the transfer of ADP-ribose units onto substrate proteins by using nicotinamide adenine dinucleotide (NAD(+)) as a cosubstrate. They have a documented role in chromatin remodelling and DNA repair, and inhibitors of ARTD1 and 2 (PARP1 and 2) are currently in clinical trials for the treatment of cancer. The detailed function of most other ARTDs is still unknown. By using virtual screening, we identified small ligands of ARTD7 (PARP15/BAL3) and ARTD8 (PARP14/BAL2). Thermal-shift assays confirmed that 16 compounds, belonging to eight structural classes, bound to ARTD7/ARTD8. Affinity measurements with isothermal titration calorimetry for two isomers of the most promising hit compound confirmed binding in the low micromolar range to ARTD8. Crystal structures showed anchoring of the hits in the nicotinamide pocket. These results form a starting point in the development of chemical tools for the study of the role and function of ARTD7 and ARTD8.
Design and synthesis of potent inhibitors of the mono(ADP-ribosyl)transferase, PARP14
a. BAL-2; ARTD-8). Two syntheticroutes were established for this series and several compounds were identified as sub-micromolar inhibitors of PARP14, the most potent of which was compound 4t, IC50 = 160 nM. Furthermore, profiling other members of this series identified compounds with >20-fold selectivity over PARP5a/TNKS1, and modest selectivity over PARP10, a closely related mono-(ADP-ribosyl)transferase