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一些脊椎动物和昆虫谷胱甘肽转移酶以甲基对硫磷(二甲基对硝基苯基硫代磷酸酯)、1-氯-2,4-二硝基苯和反式巴豆酰-N-乙酰半胱氨酸为底物时的交叉特异性。

Cross specificity in some vertebrate and insect glutathione-transferases with methyl parathion (dimethyl p-nitrophenyl phosphorothionate), 1-chloro-2,4-dinitro-benzene and s-crotonyl-N-acetylcysteamine as substrates.

作者信息

Clark A G, Smith J N, Speir T W

出版信息

Biochem J. 1973 Nov;135(3):385-92. doi: 10.1042/bj1350385.

Abstract
  1. Enzymes catalysing the reaction between GSH and methylparathion (dimethyl p-nitrophenyl phosphorothionate), 1-chloro-2,4-dinitrobenzene and S-crotonyl-N-acetylcysteamine were separated by (NH(4))(2)SO(4) precipitation from homogenates of sheep, rat and mouse livers and from homogenates of cockroaches, houseflies and grass grubs. 2. Electrofocusing of the preparations from each of these species separated a number of zones, each of which catalysed the reaction of GSH with all three substrates. 3. Ion-exchange chromatography on CM-cellulose also separated a number of fractions in which activity towards the three substrates coincided. 4. In both separation methods patterns of the activities were consistent with the presence in all species of several GSH transferases each having a degree of cross specificity towards the three substrates.
摘要
  1. 通过硫酸铵沉淀法,从绵羊、大鼠和小鼠肝脏匀浆以及蟑螂、家蝇和蛴螬匀浆中分离出催化谷胱甘肽(GSH)与甲基对硫磷(二甲基对硝基苯基硫代磷酸酯)、1-氯-2,4-二硝基苯和S-巴豆酰基-N-乙酰半胱氨酸之间反应的酶。2. 对这些物种各自的制剂进行等电聚焦,分离出多个区域,每个区域都催化GSH与所有三种底物的反应。3. 在CM-纤维素上进行离子交换色谱也分离出多个部分,其中对三种底物的活性一致。4. 在两种分离方法中,活性模式与所有物种中存在几种谷胱甘肽转移酶一致,每种酶对三种底物都具有一定程度的交叉特异性。

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