title: Amino acid sequence around the serine phosphorylated by casein kinase II in brain myosin heavy chain.
abstract: Casein kinase II from bovine brain transfers about one mole of phosphate to a serine residue near the COOH terminus of the heavy chain of myosin isolated from bovine brain. We have purified and characterized a peptide that contains this phosphoserine. The peptide was generated by chymotryptic and thermolytic digestion and was isolated by gel filtration, Fe3+ affinity chromatography, and reverse-phase high pressure liquid chromatography. Its sequence, Leu-Glu-Leu-Ser(PO4)-Asp-Asp-Asp-Asp-Glu-Ser-Lys-Ala-Ser-(Xaa)-Ile-Asn-Glu-Thr- Gln-Pro-Pro-Gln, shows that the Ser(PO4) is in an acidic environment, as is typical for casein kinase II phosphorylation sites. The "hydrophobic repeat" typical of alpha-helical coiled-coils is absent, suggesting that the sequence is part of a non-helical "tail piece" of the heavy chain. A synthetic peptide corresponding to residues 1-9 is shown to be an effective substrate for casein kinase II.
authors.affiliation: Laboratory of Neurobiochemistry, New York State Institute for Basic Research in Developmental Disabilities, Staten Island 10314.
authors.forename: N
authors.initials: N
authors.lastname: Murakami
authors.forename: G
authors.initials: G
authors.lastname: Healy-Louie
authors.forename: M
authors.initials: M
authors.lastname: Elzinga
mesh_terms: D000595:Amino Acid Sequence; D000596:Amino Acids / Q000032:analysis; D000818:Animals; D001345:Autoradiography; D001921:Brain / Q000201:enzymology / Q000378:metabolism*; D047388:Casein Kinases; D002417:Cattle; D002846:Chromatography, Affinity; D002850:Chromatography, Gel; D004591:Electrophoresis, Polyacrylamide Gel; D007700:Kinetics; D008969:Molecular Sequence Data; D009218:Myosins / Q000378:metabolism*; D010766:Phosphorylation; D011494:Protein Kinases / Q000378:metabolism*; D012694:Serine / Q000378:metabolism*
chemical_list: D000596:Amino Acids; D012694:Serine; D011494:Protein Kinases; D047388:Casein Kinases; D009218:Myosins