稳定的母体蛋白质是小鼠卵细胞到胚胎过渡期间不同的转录组,转录组和蛋白质组重编程的基础
Hongmei Zhang1,2, Shuyan Ji1,2, Ke Zhang1,2
1Center for Stem Cell Biology and Regenerative Medicine, MOE Key Laboratory of Bioinformatics, New Cornerstone Science Laboratory, School of Life Sciences, Tsinghua University, Beijing, 100084, China.
Genome biology
|July 13, 2023
概括
鼠标卵细胞到胚胎过渡 (OET) 与转录组和翻译组相比显示出不同的蛋白质组动态. 卵细胞产生的蛋白质是稳定的,可能为胚胎发育节约资源.
科学领域:
- 发展生物学 发展生物学
- 分子生物学分子生物学
- 基因组学就是基因组学.
背景情况:
- 卵子细胞转化为胚胎 (OET) 对于早期哺乳动物发育至关重要,将雌激细胞转化为全能胚胎.
- 母亲的mRNA和蛋白质控制OET,而胚胎基因组在激活之前保持沉默.
- 在OET期间的转录组,转录组和蛋白质组的协调是不太了解的.
研究的目的:
- 调查小鼠OET期间蛋白质组,翻译组和转录组的协调和动态.
- 将蛋白质组重编程与早期发育过程中的转录和翻译变化进行比较.
主要方法:
- 利用超敏感定量质谱分析了小鼠7个发育阶段的蛋白质组 (从成熟的卵细胞到芽细胞).
- 整合蛋白质组数据与现有的转录组和转录组数据.
- 开发了一种动力学模型,根据初始丰富性和翻译动力学来预测蛋白质动力学.
主要成果:
- 在OET期间的蛋白质组动力学与转录组和翻译组动力学有很大的不同.
- 从成熟卵细胞到8细胞阶段的蛋白质由储存的母体蛋白质主导.
- 即使在转录分解时,母体蛋白质也会持续到囊胚阶段,短半衰期蛋白质和转化调节后的转化后调节后的蛋白质的一致性更好.
结论:
- 鼠标卵细胞蛋白质体在OET期间表现出显著的稳定性,与更动态的转录组和转录组形成鲜明对比.
- 稳定的母体蛋白质组可以节约资源,以满足早期胚胎发育的高需求.
- 这些发现提升了对哺乳动物OET和基因表达调节原理的理解.
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