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Reference: Pereira MB, et al. (2008) Carbonyl cyanide m-chlorophenylhydrazone induced calcium signaling and activation of plasma membrane H(+)-ATPase in the yeast Saccharomyces cerevisiae. FEMS Yeast Res 8(4):622-30

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Abstract


The plasma membrane H(+)-ATPase from Saccharomyces cerevisiae is an enzyme that plays a very important role in the yeast physiology. The addition of protonophores, such as 2,4-dinitrophenol (DNP) and carbonyl cyanide m-chlorophenylhydrazone (CCCP), also triggers a clear in vivo activation of this enzyme. Here, we demonstrate that CCCP-induced activation of the plasma membrane H(+)-ATPase shares some similarities with the sugar-induced activation of the enzyme. Phospholipase C and protein kinase C activities are essential for this activation process while Gpa2p, a G protein involved in the glucose-induced activation of the ATPase, is not required. CCCP also induces a phospholipase C-dependent increase in intracellular calcium. Moreover, we show that the availability of extracellular calcium is required for CCCP stimulation of H(+)-ATPase, suggesting a possible connection between calcium signaling and activation of ATPase.

Reference Type
Journal Article
Authors
Pereira MB, Tisi R, Fietto LG, Cardoso AS, Franca MM, Carvalho FM, Tropia MJ, Martegani E, Castro IM, Brandao RL
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