title: Activation of calcium-activated, phospholipid-dependent protein kinase (protein kinase C) by new classes of tumor promoters: teleocidin and debromoaplysiatoxin.
abstract: The new potent tumor promoters teleocidin and debromoaplysiatoxin , which are structurally unrelated to phorbol esters, activate Ca2+-activated, phospholipid-dependent protein kinase (protein kinase C). The concentrations of 12-O-tetradecanoylphorbol-13-acetate, teleocidin and debromoaplysiatoxin for half-maximum activation of protein kinase C were found to be approximately 3 ng/ml, 40 ng/ml and 400 ng/ml, respectively. These three types of tumor promoters bind to protein kinase C, and appear to exhibit their pleiotropic actions through activation of this enzyme.
mesh_terms: D000470:Alkaloids / Q000494:pharmacology*; D000818:Animals; D002273:Carcinogens; D004305:Dose-Response Relationship, Drug; D004789:Enzyme Activation / Q000187:drug effects; D007783:Lactones / Q000494:pharmacology*; D008235:Lyngbya Toxins; D011493:Protein Kinase C; D011494:Protein Kinases / Q000378:metabolism*; D051381:Rats; D013329:Structure-Activity Relationship; D013755:Tetradecanoylphorbol Acetate / Q000494:pharmacology
chemical_list: D000470:Alkaloids; D002273:Carcinogens; D007783:Lactones; D008235:Lyngbya Toxins; C017179:debromoaplysiatoxin; D011494:Protein Kinases; D011493:Protein Kinase C; D013755:Tetradecanoylphorbol Acetate; C019457:lyngbyatoxin A