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Plant and Cell Physiology, 1978, Vol. 19, No. 4 627-636
© 1978

Article

Comparative studies on the effects of anions on ATPase and acid phosphatase activities from different sources

Noriko Tominaga

Biological Institute, Faculty of Science, Nagoya University Chikusa-ku, Nagoya 464, Japan

The effect of several anions on Mg2+-ATPase activity [EC 3.6.1.3 [EC] ] was studied in crude extracts of the following sources: twelve species of bacteria, one fungus, one yeast, six species of algae, five higher plant tissues, and two animal tissues. All the materials examined exhibited Mg2+-ATPase activity at pH 7.5. Except for a few species of bacteria, blue-green alga and etiolated seedlings of a leguminous plant, Mg2+-ATPases of all the materials studied were stimulated two- to ten-fold by the addition of Group VI anions such as sulfite, selenite, and chromate. This stimulation seems to be a common characteristic of ATPases of most bacteria, chloroplasts, and mitochondria.

On the other hand, the stimulation of acid phosphatase by sulfate was not observed in any organism other than Thiobacillus thiooxidans.

(Received July 27, 1977; )
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