MG-132, proteasome inhibitor

MG-132 is a potent, cell-permeable inhibitor of the proteasome (IC50=0.1 µM) and calpain (IC50=1.2 μM). MG-132 inhibits TNF-α-induced NF-κB activation and IκBα degradation (IC50=3 µM). MG-132 reduces the degradation of ubiquitin-conjugated proteins in different cell types and promotes apoptosis via activation of c-Jun N-terminal kinase (JNK1).