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高氮杂甾醇介导的酵母甾醇生物合成抑制作用。

Homoazasterol-mediated inhibition of yeast sterol biosynthesis.

作者信息

Bailey R B, Hays P R, Parks L W

出版信息

J Bacteriol. 1976 Dec;128(3):730-4. doi: 10.1128/jb.128.3.730-734.1976.

Abstract

A naturally occurring azasterol has been shown to inhibit sterol transmethylation in both in vitro and in vivo in the yeast Saccharomyces cerevisiae. The inhibition was competitive, with a calculated dissociation constant of 43 muM. The compound prevented the accumulation of ergosterol in aerobically adapting cells. Cultures forced to gain energy by respiration were found to be much more sensitive to growth inhibition by the azasterol than those cells fermenting glucose. The growth inhibition is reversible at low concentrations of the azasterol.

摘要

一种天然存在的氮杂甾醇已被证明在体外和体内均能抑制酿酒酵母中的甾醇转甲基化。这种抑制是竞争性的,计算得出的解离常数为43μM。该化合物可阻止需氧适应细胞中麦角甾醇的积累。与发酵葡萄糖的细胞相比,发现通过呼吸获取能量的培养物对氮杂甾醇的生长抑制更为敏感。在低浓度的氮杂甾醇下,生长抑制是可逆的。

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