Refereed journal article or data article (A1)

Discovery of potent and selective nonplanar tankyrase inhibiting nicotinamide mimics

List of Authors: Nkizinkiko Y, Kumar BVSS, Jeankumar VU, Haikarainen T, Koivunen J, Madhuri C, Yogeeswari P, Venkannagari H, Obaji E, Pihlajaniemi T, Sriram D, Lehtio L


Publication year: 2015

Journal: Bioorganic and Medicinal Chemistry


Journal acronym: BIOORGAN MED CHEM

Volume number: 23

Start page: 4139

End page: 4149

Number of pages: 11

ISSN: 0968-0896


Diphtheria toxin-like ADP-ribosyltransferases catalyse a posttranslational modification, ADP-ribosylation and form a protein family of 17 members in humans. Two of the family members, tankyrases 1 and 2, are involved in several cellular processes including mitosis and Wnt/beta-catenin signalling pathway. They are often over-expressed in cancer cells and have been linked with the survival of cancer cells making them potential therapeutic targets. In this study, we identified nine tankyrase inhibitors through virtual and in vitro screening. Crystal structures of tankyrase 2 with the compounds showed that they bind to the nicotinamide binding site of the catalytic domain. Based on the co-crystal structures we designed and synthesized a series of tetrahydroquinazolin-4-one and pyridopyrimidin-4-one analogs and were subsequently able to improve the potency of a hit compound almost 100-fold (from 11 mu M to 150 nM). The most potent compounds were selective towards tankyrases over a panel of other human ARTD enzymes. They also inhibited Wnt/beta-catenin pathway in a cell-based reporter assay demonstrating the potential usefulness of the identified new scaffolds for further development. (C) 2015 Elsevier Ltd. All rights reserved.

Last updated on 2022-01-12 at 11:09