Staurosporine (Stsp) is potent inhibitor of protein kinase C (PKC) from rat brain, exhibiting an IC50 value of 2.7 nM. It inhibits rat recombinant PKC-α approximately 100- and 1,000-fold better than PKC-δ and PKC-ζ, respectively. However, Stsp is non-selective in that it also inhibits the activity of a variety of other protein kinases, not only PKC isoforms. The biological effects of Stsp include cytotoxicity, relaxation of smooth muscle, and regulation of eNOS gene expression.
A complex alkaloid. staurosporine has been isolated from a strain of Streptomyces.
Staurosporine is an unusual indolocarbazole alkaloid produced by a range of actinomycete species. It is a potent antitumour active, inducing apoptosis in a variety of cell lines. Staurosporine is a potent inhibitor of many kinases including protein kinase C, tyrosine kinase, CDK2/cyclin A and CDK4/cyclin D. At submicromolar concentrations, staurosporine inhibits both IKKalpha and IKKbeta.
Staurosporine is a protein Kinase C inhibitor that induces apoptosis in many cell types.
ChEBI: Staurosporine is an indolocarbazole alkaloid and an organic heterooctacyclic compound. It has a role as an EC 2.7.11.13 (protein kinase C) inhibitor, a geroprotector, a bacterial metabolite and an apoptosis inducer. It is a conjugate base of a staurosporinium.
A potent, cell-permeable, reversible, ATP-competitive and broad spectrum inhibitor of protein kinases. Inhibits CaM kinase (IC50 = 20 nM), myosin light chain kinase (IC50 = 1.3 nM), protein kinase A (IC50 = 7 nM), protein kinase C (IC50 = 0.7 nM), and protein kinase G (IC50 = 8.5 nM). Also inhibits platelet aggregation induced by collagen or ADP but has no effect on thrombin-induced platelet aggregation. Induces apoptosis in human malignant glioma cell lines. Arrests normal cells at the G1 checkpoint.
Broad spectrum protein kinase inhibitor. Enzymes inhibited include protein kinase C (IC 50 = 3 nM), protein kinase A (IC 50 = 7 nM), p 60v-src tyrosine protein kinase (IC 50 = 6 nM) and CaM kinase II (IC 50 = 20 nM). Also available as part of the Mixed Kinase Inhibitor Tocriset™ .
1) Omura et al. (1977) A new alkaloid AM-2282 of Streptomyces origin taxonomy, fermentation, isolation and preliminary characterization; J. Antibiot., 30 275
2) Ruegg and Burgess (1989) Staurosporine, K-252 and UCN-01: potent but nonspecific inhibitors of protein kinases; Trends in Pharmacological Science 10 218
