Nonenzymatic hydrolysis of adenosine 5'-triphosphate in micellar and reversed micellar systems.
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概要
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The nonenzymatic hydrolysis of adenosine 5′-triphosphate (ATP) in micellar and reversed micellar system was examined as an approach to elucidate the function of ATPase. In aqueous micellar systems an anionic surfactant does not affect the hydrolysis rate, but a cationic surfactant, cetyltrimethylammonium bromide(CTAB), retards the hydrolysis. This deceleration effect is interpreted to be owing to the pH change or accumulation of hydroxide ions at the cationic micellar-water interface which serves as reaction site. In the reversed micellar system where aqueous ATP phase is solubilized in <I>n</I>-hexane by dodecylammonium propionate(DAP), the hydrolysis rate of ATP is enhanced by several times as compared with that in an aqueous system. Addition of Mg<SUP>2+</SUP> or Ca<SUP>2+</SUP> enhances the hydrolysis rate markedly only in the DAP reversed micellar system. The catalytic effect of the DAP reversed micellar system is discussed with respect to the polarity of water phase solubilized in the core of reversed micelles.
- 公益社団法人 日本化学会の論文
著者
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Araki Koji
Institute Of Industrial Science The University Of Tokyo
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SENO Manabu
Institute of Industrial Science, The University of Tokyo
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Shiraishi Shinsaku
Institute Of Industrial Science The University Of Tokyo
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Kise Hideo
Institute of Industrial Science, The University of Tokyo
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