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Adenosine Triphosphatase activated by Magnesium and Superprecipitation of Myosin B

Nature volume 215, pages 886–887 (1967)Cite this article

Abstract

THE importance of the divalent cations calcium and magnesium in muscle contraction is widely acknowledged1,2. An ordinary preparation of myosin B has been found to contain the “extra proteins” which are responsible for the effects of calcium on the magnesium-activated super-precipitation and adenosine triphosphatase (ATPase)3,4. As to the effects of magnesium, however, it is not clear whether this ion acts directly on the protein or indirectly by forming a complex with ATP5. How the activity of ATPase is related to the superprecipitation is still not known. We have attempted to ascertain the relationship of the two functional properties of myosin B by observing the effects of magnesium ions on the behaviour of the protein which shows no sensitivity to calcium.

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Authors and Affiliations

  1. Departments of Biochemistry and Medicine, Surgical–Medical Research Institute, University of Alberta, Edmonton

    T. NIHEI

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  1. T. NIHEI
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NIHEI, T. Adenosine Triphosphatase activated by Magnesium and Superprecipitation of Myosin B. Nature 215, 886–887 (1967). https://doi.org/10.1038/215886a0

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  • DOI: https://doi.org/10.1038/215886a0

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