Protease activated kinase I from rabbit reticulocytes has been shown to phosphorylate the P-light chain of myosin light chains isolated from rabbit skeletal muscle. The enzyme is not activated by Ca2+ and calmodulin or phospholipids. Protease activated kinase I is not inhibited by trifluoperazine at concentrations up to 200 μM or by the antibody to the Ca2+, calmodulin-dependent myosin light chain kinase from rabbit skeletal muscle. Two-dimensional peptide mapping of chymotryptic digests of myosin P-light chain show the site phosphorylated by the protease activated kinase is different from that phosphorylated by the Ca2+, calmodulin-dependent myosin light chain kinase.
|Original language||English (US)|
|Number of pages||8|
|Journal||Biochemical and Biophysical Research Communications|
|State||Published - Sep 30 1982|
ASJC Scopus subject areas
- Molecular Biology
- Cell Biology