Reference: Aburai N, et al. (2013) Pisiferdiol restores the growth of a mutant yeast suffering from hyperactivated Ca2+ signalling through calcineurin inhibition. FEMS Yeast Res 13(1):16-22

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Abstract


In the course of our screening program for a new inhibitor of the Ca(2+) signalling pathway using mutant yeast [Saccharomyces cerevisiae (zds1? erg3? pdr1? pdr3?)], a mouse PP2Ca activator, pisiferdiol, isolated from Chamaecyparis pisifera, was found to alleviate the Ca(2+) signal-mediated growth inhibition. Pisiferdiol showed growth inhibition activity against the mpk1? strain compared with the cnb1? strain and induced Li(+) sensitivity to the wild-type strain, indicating that it suppresses the calcineurin pathway in the yeast. However, the Li(+) sensitivity to ptc1? strain by pisiferdiol was diminished. Pisiferdiol showed growth restored activity in the zds1? strain without immunophilins Fkb1p or Cph1p, and in the pmc1? strain. It inhibited calcineurin-induced expression in the reporter gene assay and decreased the protein expression (Western blots) of calcineurin (Cnb1p) in addition to a decrease of Swe1p and phosphorylation of Cdc28p in the mutant yeast. These results showed that pisiferdiol could suppress indirectly the action of calcineurin and restored the growth inhibition of the mutant yeast through Ptc1p activation.

Reference Type
Journal Article
Authors
Aburai N, Yoshida J, Kobayashi M, Mizunuma M, Ohnishi M, Kimura KI
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