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柄曲霉素和5,6-二甲氧基柄曲霉素对线粒体中ATP合成的抑制作用。

Inhibitory effect of sterigmatocystin and 5,6-dimethoxysterigmatocystin on ATP synthesis in mitochondria.

作者信息

Kawai K, Nakamaru T, Nozawa Y, Maebayashi Y, Yamazaki M, Natori S

出版信息

Appl Environ Microbiol. 1984 Nov;48(5):1001-3. doi: 10.1128/aem.48.5.1001-1003.1984.

Abstract

The inhibitory effects of sterigmatocystin, O-methylsterigmatocystin, and 5,6-dimethoxysterigmatocystin on the ATP synthesis system in mitochondria were compared with that of aflatoxin B1, which disturbs the respiratory chain in mitochondria. Sterigmatocystin and 5,6-dimethoxysterigmatocystin were found to uncouple the oxidative phosphorylation process without causing depression of state 3 respiration. O-Methylsterigmatocystin did not exhibit uncoupling activity at the limited concentrations tested (due to its low solubility in an aqueous system). These compounds, as well as aflatoxin B1, elicited neither pseudo-energized nor energized swelling of mitochondria and did not inhibit Ca2+-induced swelling of mitochondria.

摘要

将柄曲霉素、O-甲基柄曲霉素和5,6-二甲氧基柄曲霉素对线粒体中ATP合成系统的抑制作用与黄曲霉毒素B1进行了比较,黄曲霉毒素B1会干扰线粒体中的呼吸链。结果发现,柄曲霉素和5,6-二甲氧基柄曲霉素可使氧化磷酸化过程解偶联,而不会导致状态3呼吸的抑制。在所测试的有限浓度下,O-甲基柄曲霉素未表现出解偶联活性(由于其在水体系中的低溶解度)。这些化合物以及黄曲霉毒素B1既不会引起线粒体的假激发肿胀也不会引起激发肿胀,并且不会抑制Ca2+诱导的线粒体肿胀。

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