title: Amino acid sequence of the regulatory subunit of bovine type I adenosine cyclic 3',5'-phosphate dependent protein kinase.
abstract: The complete amino acid sequence of the regulatory subunit of type I cAMP-dependent protein kinase from bovine skeletal muscle is presented. The S-carboxymethylated protein was cleaved with cyanogen bromide to provide a complete set of nonoverlapping fragments. These fragments were overlapped and aligned by using peptides generated by proteolytic cleavage. The protein contains 379 amino acid residues corresponding to a molecular weight of 42 804. As in the type II regulatory subunit of cAMP-dependent protein kinase, a pattern of internal gene duplication is observed, which is consistent with two cAMP-binding domains. The two types of regulatory subunit from type I and type II kinase display similarities in domain substructure and in amino acid sequence, which provide a molecular basis for new insight into their regulatory roles. Detailed analyses of the homology of the regulatory subunits of type I and type II cAMP-dependent protein kinase and of similar relationships to cGMP-dependent protein kinase and Escherichia coli catabolite gene activator protein are presented in accompanying reports from this laboratory [Takio, K., Smith, S. B., Krebs, E. G., Walsh, K., & Titani, K. (1984) Biochemistry (second paper of three in this issue); Takio, K., Wade, R. D., Smith, S. B., Krebs, E. G., Walsh, K. A., & Titani, K. (1984) Biochemistry (third paper of three in this issue)].
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D002250:Carbon Radioisotopes; D002417:Cattle; D003488:Cyanogen Bromide; D046911:Macromolecular Substances; D009132:Muscles / Q000201:enzymology; D010446:Peptide Fragments / Q000032:analysis; D011494:Protein Kinases; D014357:Trypsin
chemical_list: D002250:Carbon Radioisotopes; D046911:Macromolecular Substances; D010446:Peptide Fragments; D011494:Protein Kinases; D014357:Trypsin; D003488:Cyanogen Bromide