Smooth muscle myosin light chain kinase. Amino acid sequence at the site phosphorylated by adenosine cyclic 3',5'-phosphate-dependent protein kinase whether or not calmodulin is bound.
Turkey gizzard smooth muscle myosin light chain kinase is a calmodulin-dependent enzyme containing 2 serine residues that can be phosphorylated by cAMP-dependent protein kinase. One of these sites can be phosphorylated only when calmodulin is not bound to the enzyme; the amino acid sequence around this site has been reported recently (Lukas, T. J., Burgess, W. H., Prendergast, F. G., Lau, W., and Watterson, D. M. (1986) Biochemistry 25, 1458-1464). Here we report the sequence around the site that is phosphorylated by cAMP-dependent protein kinase whether or not calmodulin is bound: Lys-Ala-Ser(P)-Gly-Ser-Ser-Pro-Thr-Ser-Pro-Ile-Asn-Ala-Asp-Lys-Val-Glu-A sn-Glu- . This sequence conforms to the previously defined criteria for substrates of cAMP-dependent protein kinase.
D000595:Amino Acid Sequence; D000818:Animals; D001665:Binding Sites; D002147:Calmodulin / Q000378:metabolism*; D005895:Gizzard, Avian / Q000201:enzymology; D007700:Kinetics; D009130:Muscle, Smooth / Q000201:enzymology*; D009219:Myosin-Light-Chain Kinase / Q000378:metabolism*; D010766:Phosphorylation; D011485:Protein Binding; D011494:Protein Kinases / Q000378:metabolism*; D014422:Turkeys
D002147:Calmodulin; D011494:Protein Kinases; D009219:Myosin-Light-Chain Kinase