对转录因子活动时间动态的翻译后控制 调节神经发生
Xiao-Jiang Quan1, Liqun Yuan2, Luca Tiberi3
1VIB Center for the Biology of Disease, VIB, 3000 Leuven, Belgium; Center for Human Genetics, University of Leuven School of Medicine, 3000 Leuven, Belgium.
Cell
|January 30, 2016
概括
一个转化后的开关,酸化, 控制神经元前蛋白质活动的持续时间, 对于神经元发育至关重要. 改变这个开关会影响神经元数量和命运.
科学领域:
- 发育生物学
- 分子生物学
- 神经科学
背景情况:
- 神经生成依赖于短暂表达的前神经蛋白质,这些蛋白质是bHLH转录调节剂.
- 了解神经元蛋白活性持续时间的调节是理解神经元正常发育的关键.
研究的目的:
- 识别和描述控制前神经蛋白活性持续时间的保存后翻译机制.
- 研究这种机制在发育过程中调节神经元数量和命运中的作用.
主要方法:
- 使用Drosophila的基因组编辑来研究Atonal蛋白.
- 对神经蛋白质的酸化部位进行了研究 (Scute,Atonal,Neurogenin2).
- 在改变酸化状态时分析基因表达动态和神经元发育的变化.
主要成果:
- 通过调节DNA结合,发现了一种保护性酸化开关,调节了亲神经蛋白从活性状态到非活性状态的过渡.
- 通过酸化调节Drosophila的阿托纳蛋白失活,独立于mRNA水平.
- 表明抑制保存的血清残留物的酸化会导致神经元数量和命运的缺陷.
- 观察到单个氨基酸替代 (氨酸到氨酸) 会改变神经元活动的持续时间,并导致神经元命运缺陷.
结论:
- 翻译后化是控制前神经蛋白活性持续时间的关键开关.
- 这种酸化机制对于精确控制神经元发育至关重要,包括神经元数量和细胞命运的确定.
- 这些发现突显出一种保留的调节机制,对理解神经发育过程有影响.
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