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Instruments / Technical Area	Publication Details	Published	Actions
I03-Macromolecular Crystallography	Family-wide chemical profiling and structural analysis of PARP and tankyrase inhibitors Elisabet Wahlberg , Tobias Karlberg , Ekaterina Kouznetsova , Natalia Markova , Antonio Macchiarulo , Ann-Gerd Thorsell , Ewa Pol , Åsa Frostell , Torun Ekblad , Delal Öncü , Björn Kull , Graeme Michael Robertson , Roberto Pellicciari , Herwig Schüler , Johan Weigelt Nature Biotechnology 30 (3), 283 - 288 DOI: 10.1038/nbt.2121 PMID: 22343925 Diamond Proposal Number(s): [6603] Show Abstract ▼ Abstract: Inhibitors of poly-ADP-ribose polymerase (PARP) family proteins are currently in clinical trials as cancer therapeutics, yet the specificity of many of these compounds is unknown. Here we evaluated a series of 185 small-molecule inhibitors, including research reagents and compounds being tested clinically, for the ability to bind to the catalytic domains of 13 of the 17 human PARP family members including the tankyrases, TNKS1 and TNKS2. Many of the best-known inhibitors, including TIQ-A, 6(5H)-phenanthridinone, olaparib, ABT-888 and rucaparib, bound to several PARP family members, suggesting that these molecules lack specificity and have promiscuous inhibitory activity. We also determined X-ray crystal structures for five TNKS2 ligand complexes and four PARP14 ligand complexes. In addition to showing that the majority of PARP inhibitors bind multiple targets, these results provide insight into the design of new inhibitors.	Feb 2012

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