Wortmannin
A cell-permeable, fungal metabolite that acts as a potent, selective, and irreversible inhibitor of phosphatidylinositol 3-kinase in purified preparations and cytosolic fractions (IC50 = 5 nM). Blocks the catalytic activity of PI 3-kinase without affecting the upstream signaling events. Preincubation of fibroblasts with wortmannin abolishes PDGF-mediated Ins(3,4,5)P3 formation (IC50 = 5 nM). Also blocks the metabolic effects of insulin in isolated rat adipocytes without affecting the insulin receptor tyrosine kinase activity. Inhibits MAP kinase activation induced by platelet activating factor in guinea pig neutrophils (200 - 300 nM). Also inhibits other kinases such as myosin light chain kinase (IC50 = 200 nM) and PI 4-kinase at concentrations higher than that required for inhibition of PI 3-kinase. Also blocks phospholipase D. A 10 mM (1 mg/233 µl) solution of Wortmannin (Cat. No. 681676) in DMSO is also available
Form:  White to off-white solid 
Primary Target:  phosphatidylinositol-3-kinase 
Primary Target: IC50  5 nM 
Secondary target:  mlck (IC,sub>50 = 200 nM) 
Molar mass:  428.4 
Protect from Light : Yes 
Packaged under inert gas  Yes 
Cell permeable:  Yes 
Purity : ≥95% by HPLC 
Solubility:  DMSO or MeOH 
Chemical formula:  C23H24O8 
RTECS : CB9641000 
CAS number : 19545-26-7 
Merck USA index : 14, 10053
Storage:  -20°C 
Ship : Ambient Temperature Only
       Highly Toxic