title: Stimulation of a histone H4 protein kinase in Triton X-100 lysates of rabbit peritoneal neutrophils pretreated with chemotactic factors. Effect of fMet-Leu-Phe and partial characterization of the protein kinase.
abstract: Rabbit peritoneal neutrophils were stimulated with either the chemotactic factor, fMet-Leu-Phe (10(-8) M, 10 s) or the protein kinase C activator, phorbol-12-myristate-13-acetate (PMA), (0.1 microgram/ml, 3 min) at 37 degrees C, lysed with Triton X-100 at the indicated times and the histone H4 kinase activity of the lysate measured. The histone H4 protein kinase activity was increased severalfold by fMet-Leu-Phe but not PMA. The inclusion of the potent protein kinase C inhibitor, 1-(5-isoquinoline-sulfonyl)-2-methylpiperazine (50 microM) inhibited little if any of the histone H4 protein kinase activity. The effect of fMet-Leu-Phe was transient, maximum stimulation occurring within 10 s and decaying thereafter. The soluble fraction (extract) of the Triton X-100 lysates from control and fMet-Leu-Phe-treated cells was found to contain both histone H4 protein kinase and calcium-phospholipid-activated protein kinase (protein kinase C) activities. The histone H4 protein kinase activity obtained after fMet-Leu-Phe treatment was very little affected by calcium, phospholipid, and PMA and preferred histone H4 but not H1 or H2A as its substrate. In contrast, the calcium-phospholipid-activated protein kinase activity of the extract preferred histones H1 or H2A as substrates and was strongly inhibited by 1-(5-isoquinoline-sulfonyl)-2-methylpiperazine. The histone H4 protein kinase was partially separated from kinase C by DEAE-cellulose and phenyl-Sepharose 4B chromatography. It phosphorylated mostly serine in histone H4. The results indicate that the chemotactic factor, fMet-Leu-Phe, stimulates a protein kinase with substrate specificity and biochemical properties distinct from calcium-phospholipid-activated protein kinase C.
authors.affiliation: Department of Pathology, University of Connecticut Health Center, Farmington 06032.
authors.forename: C K
authors.initials: CK
authors.lastname: Huang
authors.forename: G F
authors.initials: GF
authors.lastname: Laramee
mesh_terms: D000818:Animals; D006657:Histones / Q000378:metabolism; D007700:Kinetics; D008666:Metalloendopeptidases / Q000378:metabolism; D009240:N-Formylmethionine Leucyl-Phenylalanine / Q000494:pharmacology*; D009504:Neutrophils / Q000187:drug effects* / Q000201:enzymology; D017830:Octoxynol; D010537:Peritoneum / Q000166:cytology; D011092:Polyethylene Glycols; D006656:Protamine Kinase / Q000378:metabolism*; D011494:Protein Kinases / Q000378:metabolism*; D011817:Rabbits; D013379:Substrate Specificity
chemical_list: D006657:Histones; D011092:Polyethylene Glycols; D009240:N-Formylmethionine Leucyl-Phenylalanine; D017830:Octoxynol; D011494:Protein Kinases; D006656:Protamine Kinase; D008666:Metalloendopeptidases; C022653:auR protein, Staphylococcus aureus