Description: Ophiobolin A is a fungal metabolite and a phytotoxin and is an effective and irreversibly inhibitor of calmodulin-activated cyclic nucleotide phosphodiesterase (IC50: 9 µM). Ophiobolin A also has antimicrobial and anticancer activity. Target: Others. Smiles:...

Calmodulin is a calcium-sensing protein that regulates a wide array of proteins involved in diverse cellular functions. Ophiobolin A is a sesterterpenoid fungal phytotoxin that binds and irreversibly antagonizes calmodulin, blocking the activation of calmodulin-dependent phosphodiesterase with an IC50 value of 9 µM....

White solid. Soluble in ethanol, methanol, DMSO or dimethylformamide. Poorly soluble in water. Cell permeable, irreversible calmodulin antagonist. Acts by covalently binding to a lysine-rich inhibitory site. Inhibits by blocking the activation of the Ca2+/calmodulin-dependent phosphodiesterase, Herbicidal mycotoxin,...