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Updated: Jun 26, 2025

Large-scale Top-down Proteomics Using Capillary Zone Electrophoresis Tandem Mass Spectrometry

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Published on: October 24, 2018

使用喷雾-毛细血管-毛细血管电泳-质谱仪对图形图像级复杂样品进行自上而下的蛋白质学分析

Zhitao Zhao¹, Yanting Guo¹, Trishika Chowdhury²

¹Department of Chemistry and Biochemistry, University of Oklahoma, 101 Stephenson Parkway, Norman, Oklahoma 73019, United States.

Analytical chemistry

|May 9, 2024

概括

我们开发了一种高度敏感的喷雾毛细毛细电泳质谱平台,用于上下蛋白质组学. 这种方法可以在质量有限的生物样本中对完整的蛋白质进行超敏感分析,包括单细胞.

科学领域:

生物化学生物化学
分析化学分析化学
分子生物学分子生物学

背景情况:

顶向下蛋白质组学对于理解生物系统在质量有限的样本 (如患者组织和单细胞) 中至关重要.
现有的自上而下的方法缺乏这些具有挑战性的样本类型所需的灵敏度.
毛细电泳 (CE) 提供高分辨率和低检测极限,使其适用于质量有限的样品.

研究的目的:

开发一个超灵敏的自上而下的蛋白质组学平台,用于量有限的生物样本.
为了提高电子喷雾电离 (ESI) 辅助喷雾毛细血管装置的敏感性,用于蛋白质组学.
为了能够在复杂样本中分析完整的蛋白质,直到单细胞水平.

主要方法:

开发一个喷雾毛细血管CE-MS平台,其中包含一个聚乙烯胺 (PEI) 涂层毛细血管.
优化喷雾毛细血管内部直径以提高灵敏度.
将基于纳米滴的样品制备与优化的CE-MS平台相结合.

主要成果:

从50 pg的E中检测到200多种蛋白质形式. 大肠杆菌酸盐.
实现了高灵敏度,代表了顶向下蛋白质组学检测的重大进步.
成功地从不到50个HeLa细胞和OVCAR-8细胞中分别识别出261±65和174±45个完整的蛋白形.

结论:

经过修改的喷雾毛细体CE-MS平台,可以对图形图层样本进行自上而下的蛋白质组学分析.
这项技术可以对质量有限的样本进行有意义的蛋白质组分析,包括单个哺乳动物细胞.
代表了复杂生物系统中超敏感的自上而下的蛋白质组学的突破.

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