PMID- 3552814 OWN - NLM STAT- MEDLINE DCOM- 19870529 LR - 20190816 IS - 0012-186X (Print) IS - 0012-186X (Linking) VI - 29 IP - 12 DP - 1986 Dec TI - Polyamine-enhanced casein kinase II in mouse pancreatic islets. PG - 888-92 AB - The occurrence of polyamine-stimulated protein kinase (casein kinase II) in cytosol of mouse pancreatic islets was investigated. Islet protein phosphorylation was enhanced by spermidine, spermine, lysine-rich histone and polylysine; the major endogenous substrates in the cytosol were three proteins of Mr 50,000, 55,000 and 100,000. Cadaverine and putrescine were without effects. A Mr 100,000 protein is a major substrate for Ca2+-calmodulin-dependent protein kinase, and Mr 50,000 and 55,000 proteins are substrates for cyclic adenosine 3',5'-cyclic monophosphate (AMP) dependent protein kinase in mouse islets. However, neither cyclic-AMP-dependent protein kinase inhibitor nor trifluoperazine inhibited polyamine-enhanced protein phosphorylation. Both basal and polyamine-enhanced protein phosphorylation patterns were identical when either [gamma-32P] adenosine 5'-triphosphate (ATP) or [gamma-32P] guanosine 5'-triphosphate (GTP) was used as phosphate donors, indicative of the presence of a polyamine-stimulated casein kinase II in pancreatic islets. It is suggested that polyamines and polyamine-enhanced casein kinase II activity may have an important role in regulation of protein phosphorylation in pancreatic islets. FAU - Thams, P AU - Thams P FAU - Capito, K AU - Capito K FAU - Hedeskov, C J AU - Hedeskov CJ LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - Germany TA - Diabetologia JT - Diabetologia JID - 0006777 RN - 0 (Histones) RN - 0 (Polyamines) RN - 0 (Protein Kinase Inhibitors) RN - 214IZI85K3 (Trifluoperazine) RN - 25104-18-1 (Polylysine) RN - 2FZ7Y3VOQX (Spermine) RN - EC 2.7.- (Protein Kinases) RN - EC 2.7.11.1 (Casein Kinases) RN - L90BEN6OLL (Cadaverine) RN - U87FK77H25 (Spermidine) RN - V10TVZ52E4 (Putrescine) SB - IM MH - Animals MH - Cadaverine/pharmacology MH - Casein Kinases MH - Histones/pharmacology MH - In Vitro Techniques MH - Islets of Langerhans/drug effects/*enzymology MH - Male MH - Mice MH - Phosphorylation MH - Polyamines/*pharmacology MH - Polylysine/pharmacology MH - Protein Kinase Inhibitors MH - Protein Kinases/*metabolism MH - Putrescine/pharmacology MH - Spermidine/pharmacology MH - Spermine/pharmacology MH - Trifluoperazine/pharmacology EDAT- 1986/12/01 00:00 MHDA- 1986/12/01 00:01 CRDT- 1986/12/01 00:00 PHST- 1986/12/01 00:00 [pubmed] PHST- 1986/12/01 00:01 [medline] PHST- 1986/12/01 00:00 [entrez] AID - 10.1007/BF00870145 [doi] PST - ppublish SO - Diabetologia. 1986 Dec;29(12):888-92. doi: 10.1007/BF00870145.