Chemically Induced Degradation of Sirtuin 2 (Sirt2) by a Proteolysis Targeting Chimera (PROTAC) Based on Sirtuin Rearranging Ligands (SirReals)

5 years ago

Chemically Induced Degradation of Sirtuin 2 (Sirt2) by a Proteolysis Targeting Chimera (PROTAC) Based on Sirtuin Rearranging Ligands (SirReals)

Dina Robaa, Attila Lehotzky, Judit Ovádi, Sören Hammelmann, Manfred Jung, Daniel Herp, Sören Swyter, Wolfgang Sippl, Judit Oláh, Matthias Schiedel

Here we report the development of a proteolysis targeting chimera (PROTAC) based on the combination of the unique features of the sirtuin rearranging ligands (SirReals) as highly potent and isotype-selective Sirt2 inhibitors with thalidomide, a bona fide cereblon ligand. For the first time, we report the formation of a PROTAC by Cu(I)-catalyzed cycloaddition of a thalidomide-derived azide to an alkynylated inhibitor. This thalidomide-derived azide as well as the highly versatile linking strategy can be readily adapted to alkynylated ligands of other targets. In HeLa cells, our SirReal-based PROTAC induced isotype-selective Sirt2 degradation that results in the hyperacetylation of the microtubule network coupled with enhanced process elongation. Thus, our SirReal-based PROTAC is the first example of a probe that is able to chemically induce the degradation of an epigenetic eraser protein.

Publisher URL: http://dx.doi.org/10.1021/acs.jmedchem.6b01872

DOI: 10.1021/acs.jmedchem.6b01872