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ATP and the autonomy of the contractile vacuole inAmoeba proteus

✍ Scribed by Pothier, F. ;Couillard, P. ;Forget, J.

Publisher
John Wiley and Sons
Year
1984
Tongue
English
Weight
776 KB
Volume
230
Category
Article
ISSN
0022-104X

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✦ Synopsis

Abstract

Contractile vacuole function in amoebae treated with immobilizing (5 mM) and nonimmobilizing (0.125 mM) concentrations of ATP has been studied. In ATP‐immobilized amoebae, most vacuolar parameters are accelerated, especially the rate of output which passes from 30 to 70 ΞΌm^3^/sec. This favors the concept of an autonomous vacuole, fully functional in the absence of any bulk contribution to it from remote points of the cell. A lower concentration of ATP (0.125 mM), which does not inhibit movement, causes a still greater acceleration of vacuolar function. Work is in progress to elucidate the site and mode of action of exogenous ATP on Amoeba.

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