Title : The effects of calcium and magnesium ions on the adenosine triphosphatase and inosine triphosphatase activities of myosin A.

Pub. Date : 1969 Aug

PMID : 4309596






2 Functional Relationships(s)
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Compound Name
Protein Name
Organism
1 The relationship between the rate of hydrolysis of ATP or ITP and the concentration of Ca(2+) suggests that a relatively weak binding of Ca(2+) either to myosin or to the substrate nucleotide is responsible for the activation of the enzymic activity. Inosine Triphosphate myosin heavy chain 14 Homo sapiens
2 The behaviour of the hydrolytic activity of myosin on ATP or ITP in the presence of both Ca(2+) and Mg(2+) is consistent with the explanation that the inhibition by Mg(2+) is due to the tight binding of Mg(2+) to myosin, whereas the activation by Ca(2+) is caused either by a weak binding of Ca(2+) to myosin or by CaATP(2-) or by both. Inosine Triphosphate myosin heavy chain 14 Homo sapiens