由Drosophila shibire基因编码的类似dynamin的蛋白质与囊泡交通相关
A M van der Bliek1, E M Meyerowitz
1Division of Biology, California Institute of Technology, Pasadena 91125.
Nature
|May 30, 1991
概括
德洛索菲拉的shibire基因突变通过阻断内细胞分裂,导致温度敏感性. 该基因编码了一种同类于老鼠激素的蛋白质,这表明它在囊泡运输中发挥了作用.
科学领域:
- 分子生物学分子生物学
- 遗传学 遗传学 是一个
- 神经科学是一个神经科学.
背景情况:
- 德洛索菲拉的shibire突变导致对温度敏感的.
- 这种缺陷与内细胞分裂的可逆阻断有关,损害了膜循环和突触囊泡枯竭.
- 这种Shibire突变会影响各种非神经元组织.
研究的目的:
- 为了绘制和表征石比尔基因.
- 为了确定船突变效应的分子基础.
- 了解shibire基因产物在细胞过程中的作用.
主要方法:
- 一个含有shibire基因的酵母人工染色体的亚克隆.
- 使用限制片段长度多态的分析来定位基因.
- 使用野生型DNA碎片对突变表型的功能性救援.
- 突变异位基因的DNA测序以确定遗传差异.
主要成果:
- 希比尔基因成功地被绘制和分离出来.
- 野生类型的15基基DNA片段拯救了突变的表型.
- 希比尔基因编码了一种具有69%氨基酸特性的蛋白质,用于鼠类.
- 希比尔基因产物和dynamin被提议是同源的同类物.
结论:
- 希比尔基因对Drosophila的内细胞和膜循环至关重要.
- 鉴定到的shibire基因产物是dynamin的同源,这是一个GTP驱动的机械化学酶.
- 这些蛋白质可能在内细胞分裂过程中充当囊泡运输的引擎.
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