Antibiotic UCN-01

Antibiotic UCN-01 is a indolcarbazole. It is a cell-permeable Staurosporine derived anticancer agent that reversibly and ATP-competitively inhibits several protein kinases (IC50 = 29 nM, 34 nM, 30 nM, 590 nM and 530 nM for PKCa, PKCß, PKC?, PKCd and PKCe; IC50 = 7 nM, 27 nM, 50 nM, 50 nM, 150 nM and 1.04 µM for Chk1, Cdc25C-associated protein kinase 1, Cdk1, PAK4, Cdk5/p25 and Chk2; IC50 = 33 nM, 50 nM, 95 nM, 500 nM, 500 nM and 1.0 µM for PDK1, lck, MAPKAP kinase-2, Akt, GSK-3ß and PKA, respectively). At higher concentrations (> 15 µM), affects the activities of Src, PIM-1, CKII, DNA-PK, ErK1, ILK-1 and MAPKK1). Reported to suppress thymidylate synthase expression, induce apoptosis with caspase activation, and sensitize tumor cells to a range of DNA-damaging agents.