相关实验视频
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Imaging Calcium in Drosophila at Egg Activation
Published on: August 6, 2016
哺乳动物卵中的振荡是由可溶性精子蛋白引发的
J Parrington1, K Swann, V I Shevchenko
1MRC National Institute for Medical Research, The Ridgeway, London, UK.
Nature
|January 25, 1996
概括
研究人员鉴定出一种精子蛋白 - - 素,它触发了哺乳动物卵激活和胚胎发育所必需的振荡. 这一发现揭示了启动受精和发育的关键因素.
科学领域:
- 生殖生物学 生殖生物学
- 发展生物学 发展生物学
- 细胞信号传输 细胞信号传输
背景情况:
- 卵中的精子诱导的 (Ca2+) 振荡对于哺乳动物受精和胚胎发育至关重要.
- 精子启动这些Ca2+振荡的确切机制仍然是未知的.
- 精子-卵子相互作用和细胞内Ca2+释放之间的直接联系尚未确立.
研究的目的:
- 为了确定负责启动哺乳动物卵中的Ca2+振荡的精子衍生因子.
- 阐明精子触发卵子激活背后的分子机制.
主要方法:
- 在哺乳动物卵中微注射精子提取物以观察Ca2+振荡.
- 精子蛋白具有Ca2+振荡诱导活性的生物化学表征.
- 克隆和确定精子蛋白的序列分析.
主要成果:
- 鉴定出一种可溶性精子蛋白,称为氨酸,在卵子中具有强大的Ca2+振荡诱导 ("振荡原") 活性.
- 奥西林存在于具有33K子单元的寡合体形式,并且局部存在于精子的赤道段.
- 对于33K冲素子单元的补充DNA显示出与 prokaryotic hexose phosphate isomerase 的相似性.
结论:
- 奥西林被确定为一种主要的精子衍生因子,可触发哺乳动物卵激活所需的Ca2+振荡.
- 这种蛋白质可能代表了哺乳动物胚胎发育的生理触发器.
- 这些发现为了解受精和早期发育的开始提供了分子基础.
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