estramustine衍生品体外微管装配的效果取决于取代基的电荷。
文章的细节
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引用
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Friden B, Rutberg M, Deinum J,沃林M
estramustine衍生品体外微管装配的效果取决于取代基的电荷。
生物化学杂志。1991年8月8日,42 (5):997 - 1006。
- PubMed ID
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1908244 (在PubMed]
- 文摘
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Estramustine,和衍生品的Estramustine取代基位置17雌激素一半,一直在追究其影响牛脑微管体外。带负电荷的磷酸estramustine已经发现以前microtubule-associated蛋白质(MAP)端依赖微管抑制剂(沃林M, Deinum J和Friden B, 2月179:289 - 293,1985]。在目前研究磷酸estramustine MAP2和τ的绑定了。这两个地图有两到三个结合位点estramustine磷酸盐是兼容的报告数量这些地图的基本氨基酸重复,被认为是终极的微管蛋白结合域。绑定的Kd estramustine磷酸MAP2估计要20 microM 4度,,200 microMτ,绑定的。离解率很低(T1/2大于2小时),这表明estramustine磷酸盐可能稳定protein-drug复杂的绑定通过改变蛋白质的构象。两个新的带负电estramustine衍生品,estramustine硫酸盐和estramustine葡糖苷酸,被发现是类似MAP-dependent微管抑制剂。50%抑制浓度硫酸的大会是100年microM导数,对磷酸estramustine之前发现的一样,250 microM更笨重estramustine葡糖苷酸。一个带正电的导数,estramustine sarcosinate没有抑制微管组装或改变coassembled地图的构成。然而,微管的形态的影响。 The uncharged estramustine bound to both tubulin and MAPs, but no effects were seen on microtubule assembly, the composition of coassembled MAPs or the microtubule morphology. Our results suggest that only negatively charged estramustine derivatives have a MAP-dependent microtubule inhibitory effect. The two new negatively charged derivatives could therefore be valuable tools in the study of tubulin-MAP interactions. The results also confirm that these interactions between tubulin and MAPs are mainly electrostatic.
DrugBank数据引用了这篇文章
- 药物靶点
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药物 目标 类 生物 药理作用 行动 Estramustine Microtubule-associated蛋白2 蛋白质 人类 是的拮抗剂细节