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The regulation of CaM BP-10 mediated PM H~(+)-ATPase activity by phosphorylation

Abstract

The present study showed that BP-10 inhibited the IAA-induced activity and phosphorylation of plasma membrane H~(+)-ATPase (PM H~(+)-ATPase) in in vivo experiment. The inhibitory effect can be reversed by IAA and can also be overcome by the addition of CaM. The results are perfectly in accord with those of our preliminary studies. The activity of PM-ATPase (Y) has been found to be positively correlated with the extent of its phosphorylation (X) which can be expressed as Y=22.3303+0.7656X(P<0.01).

Key words: Calmodulin;Calmodulin binding protein auxin;Plasma membrane H~(+)-ATPase; Protein phosphorylation;

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Citing This Article：

. The regulation of CaM BP-10 mediated PM H~(+)-ATPase activity by phosphorylation. Acta Physiol Sin 1998; 50 (3): (in Chinese with English abstract).