Implicated in the level of global muscle contraction and cardiac function. Phosphorylates a specific serine in the N-terminus of a myosin light chain.
Subcellular locations: Cytoplasm
Colocalizes with phosphorylated myosin light chain (RLCP) at filaments of the myofibrils.
Heart and skeletal muscles. Increased expression in the apical tissue compared to the interventricular septal tissue.