亚细胞质谱检测揭示了非对称分裂 (青) 胚胎干细胞中的蛋白质组重塑
bioRxiv : the preprint server for biology
|June 4, 2025
概括
这项研究引入了一种新的微探针毛细体电泳质谱法 (CE-MS) 方法,用于深层亚细胞蛋白质组学,使得单个胚胎细胞内的1000多种蛋白质的量化成为可能. 这一突破为细胞发育和分子组织提供了新的见解.
科学领域:
- 细胞和分子生物学 细胞和分子生物学
- 蛋白质组学是指蛋白质组学.
- 发展生物学 发展生物学
背景情况:
- 亚细胞蛋白质组学需要高空间分辨率来理解细胞过程.
- 在亚细胞水平进行深度蛋白质组分析,量化数百到数千种蛋白质,仍然是一个重大的技术挑战.
- 了解单细胞内的分子结构对于发育生物学至关重要.
研究的目的:
- 推进微探针毛细血管电泳质谱 (CE-MS) 进行深度亚细胞蛋白质组学.
- 为了在单个,不对称地分裂的胚胎细胞中实现高蛋白质覆盖率.
- 使用空间蛋白质组学研究胚胎早期发育过程中的分子变化.
主要方法:
- 集成CE电子喷雾电离 (CE-ESI) 与被困离子移动性光谱飞行时间 (timsTOF) MS.
- 实施数据独立获取 (DIA) 使用并行积累-串行碎片化 (diaPASEF) 进行定量蛋白质组学.
- 微探针采样Xenopus laevis的芽细胞体,用于蛋白质组分析.
主要成果:
- 使用CE-diaPASEF工作流程,从大约200ppg的蛋白质消化物中量化了1035种蛋白质,实现了高可重现性.
- 在8个细胞的Xenopus laevis胚胎中,在背部动物芽质体的对立极的808到1022个蛋白质的识别和定量.
- 对比蛋白质组分析揭示了胚芽细胞后代的保存和分离的蛋白质概况,与神经和表皮命运相关.
结论:
- 微探测器CE-diaPASEF被确立为深度亚细胞蛋白质组学的强大平台.
- 该技术能够在关键的发育过程中对空间蛋白质组组织进行前所未有的洞察.
- 这种方法促进了从不对称的细胞分裂中产生的分子异质性的研究.
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