title: Regulation of membrane associated protein kinase C activity by guanine nucleotide in rabbit peritoneal neutrophils.
abstract: Evidence is shown that protein kinase C is the major kinase which can phosphorylate histone H-1 in a membrane fraction prepared from rabbit peritoneal neutrophils. Addition of phorbol-12-myristate-13-acetate (PMA) (0.1 microgram/ml) or guanosine-5'-(3-O-thio)triphosphate (GTP gamma S) (10 microM) to the membrane fraction results in an increase of the phosphorylation of histone H-1. To achieve this effect, calcium (20 microM) is required for GTP gamma S but not for PMA. The effect of GTP gamma S, but not PMA is inhibited in membranes obtained from cells pretreated with pertussis toxin. The kinase activity is also enhanced by treatment of the membrane with 10 microM of GppNHp or GTP but not with GDP, GMP, cGMP, ATP, ADP, AMP and cAMP. This is the first direct evidence that a GTP binding protein is involved in the activation of membrane associated protein kinase C.
mesh_terms: D000818:Animals; D002118:Calcium / Q000494:pharmacology; D002462:Cell Membrane / Q000201:enzymology; D004789:Enzyme Activation / Q000187:drug effects; D006150:Guanine Nucleotides / Q000502:physiology*; D016244:Guanosine 5'-O-(3-Thiotriphosphate); D006160:Guanosine Triphosphate / Q000031:analogs & derivatives / Q000494:pharmacology; D006657:Histones / Q000378:metabolism; D008565:Membrane Proteins / Q000378:metabolism; D009504:Neutrophils / Q000201:enzymology*; D010529:Peritoneal Cavity / Q000166:cytology; D010716:Phosphatidylinositols / Q000378:metabolism; D010750:Phosphoproteins / Q000378:metabolism; D011493:Protein Kinase C / Q000378:metabolism*; D011817:Rabbits; D013755:Tetradecanoylphorbol Acetate / Q000494:pharmacology; D013873:Thionucleotides / Q000494:pharmacology
chemical_list: D006150:Guanine Nucleotides; D006657:Histones; D008565:Membrane Proteins; D010716:Phosphatidylinositols; D010750:Phosphoproteins; D013873:Thionucleotides; D016244:Guanosine 5'-O-(3-Thiotriphosphate); D006160:Guanosine Triphosphate; D011493:Protein Kinase C; D013755:Tetradecanoylphorbol Acetate; D002118:Calcium