Properties of ATPase activity in intact vegetative cells and sporulating cells of yeast Saccharomyces cerevisiae.

The properties of ATPase activity were examined in the intact cells of yeast. The activity was stimulated by Mg2+, Mn2+ and Co2+. The activity was inhibited by NaN3 and by high concentrations of NaF, NaVO3 and PCMB. Optimal pH for the activity was approximately 8. The maximum value of the activity was obtained in the cells at the early stationary phase and it decreased in 3 hr after transfer to sporulation medium.