Plays a role in the regulation of contractile properties of both striated and smooth muscles. When unphosphorylated, may inhibit myosin dephosphorylation. Phosphorylation at Ser-299 reduces this inhibitory activity.
Specificity
Natural and recombinant Human Smoothelin-like protein 1
Subcellular Location
Cytoplasm myofibril Cytoplasm myofibril sarcomere I band Cytoplasm myofibril sarcomere M line Nucleus Colocalizes with MYH2. In its unphosphorylated state, localizes to the cytoplasm (By similarity). Phosphorylation at Ser-301 promotes translocation to the nucleus.