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A myosin-like protein from smooth muscle
K Kohama1, Y Lin, H Takano-Ohmuro
1Department of Pharmacology, Gunma University School of Medicine, Japan.
Journal of Cell Science. Supplement
|January 1, 1991
Abstract:
A protein was purified from chicken gizzard smooth muscle. It bound ATP and actin. Actin activated the Mg2(+)-ATPase activity of this protein. The Ca2(+)-ATPase activity was lower than K(+)-EDTA ATPase activity. Thus, it appears that this protein is akin to myosin I rather than to conventional myosin. However, ATPase activities of the protein were much lower than those of myosin I. A protein cofactor, such as protein kinase, which would enhance these activities remains to be purified from the smooth muscle.