Caltropin interactions

C, Regulation of Caldesmon and Heavy Meromyosin Interaction by Caltropin... 

Current studies suggest a vital role for CaD in the regulation of smooth muscle contraction since it inhibits the actin-activated ATPase activity of myosin (Da-browska et al., 1985 Smith and Marston, 1985 Moody et al., 1985 Sobue et al., 1985) and its subfragments (Lash et al., 1986 Chalovich et al., 1987). However, defining the precise role of CaD in cells requires an understanding of its interaction with several key proteins, namely, actin, myosin, calmodulin, and caltropin. 

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