Glucose-dependent, cAMP-mediated ATP efflux from Saccharomyces cerevisiae

Article Abstract:

An analysis the cAMP-mediated ATP efflux from Saccharomyces cerevisiae was conducted to determine ATP's important role in the physiology of multicellular organisms. Results show that ATP efflux require glucose. Furthermore, the rate of efflux was increased by proton ionophores such as nigericin and monensin as well as by the plasma membrane proton pump inhibitor diethylstilbestrol. Results also indicat that the cAMP pathway triggered ATP efflux and that yeast cells release ATP in a regulated manner.

Adenosine triphosphate, ATP, Cyclic adenylic acid, Cyclic adenosine monophosphate, Ionophores

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Reduction of ATPase activity accompanied by photodecomposition of ergosterol by near-UV irradiation in plasma membranes prepared from Saccharomyces cerevisiae

Article Abstract:

Intact yeast plasma membranes and reconstructed liposomes were used to investigate the relationship between change in ATPase activity and decomposition of ergosterol by near-UV irradiation. Results suggest that the reduction of ATPase activity in the plasma membrane by near-UV is attributable to conformational changes in the membrane-spanning region of ATPase and not by the photochemical destruction of the primary structure of enzyme molecule.

Adenosine triphosphatase

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