SirReal1-O-propargyl is a selective and highly potent Sirtuin 2 (Sirt2) inhibitor, with an IC50 of 2.4 μM. SirReal1-O-propargyl, the SirReal1-based moiety, binds to the cereblon ligand via a linker to form PROTAC to degrade Sirt2[1].
Kirromycin is an antibiotic originally isolated from Streptomyces and an inhibitor of protein biosynthesis. It inhibits isoleucine incorporation, polyphenylalanine synthesis, and growth of B. brevis. Kirromycin inhibits elongation factor Tu-dependent peptidyl transfer activity in E. coli.