MBP146-78

MBP146-78 inhibits the growth of Eimeria spp. both in vitro and in vivo. The molecular target of MBP146-78 was identified as cGMP-dependent protein kinase (PKG) using a tritiated analogue to purify a approximately 120-kDa protein from lysates of Eimeria tenella. This represents the first example of a protozoal PKG. MBP146-78 is a potent inhibitor of both soluble and membrane-associated isoforms of native PKG, as well as recombinant enzyme, with an IC50 of <1nm.