title: Activation of type I and type II cyclic AMP-dependent protein kinases by 2,8-disubstituted derivatives of cyclic AMP.
abstract: Derivatives of cyclic AMP with substituents in both the 2-position (methyl or butyl) and the 8-position (bromo, benzylthio, p-chlorophenylthio or azido) and their singly modified parent compounds were examined for their abilities to activate type I isozymes of cyclic AMP-dependent protein kinases from rabbit and porcine muscle and type II isozymes of cyclic AMP-dependent protein kinases from bovine brain and heart. The specificity of 2-n-butyl-cyclic AMP for type II was substantially reduced or eliminated by the addition of 8-substituents. The lack of specificity of 2-methyl-cyclic AMP for either type I or II was not changed by the addition of 8-substituents.
mesh_terms: D000818:Animals; D002417:Cattle; D000242:Cyclic AMP / Q000031:analogs & derivatives* / Q000494:pharmacology; D004789:Enzyme Activation / Q000187:drug effects; D008968:Molecular Conformation; D011494:Protein Kinases / Q000378:metabolism*; D011817:Rabbits; D013329:Structure-Activity Relationship; D013552:Swine
chemical_list: D000242:Cyclic AMP; D011494:Protein Kinases