高等学校化学学报 ›› 2024, Vol. 45 ›› Issue (11): 20240344.doi: 10.7503/cjcu20240344

• 研究论文 • 上一篇    下一篇

深度覆盖蛋白质组学质谱分析: 细胞蛋白提取方法的评估

许霞1, 秦伟达1, 李若萌1, 王倩倩2, 刘宁2, 李功玉1()   

  1. 1.南开大学化学学院分析科学研究中心,天津市生物传感与分子识别重点实验室,天津 300071
    2.南开大学药物化学生物学国家重点实验室,天津 300350
  • 收稿日期:2024-07-08 出版日期:2024-11-10 发布日期:2024-08-23
  • 通讯作者: 李功玉 E-mail:ligongyu@nankai.edu.cn
  • 基金资助:
    国家自然科学基金(22104064)

Mass Spectrometry-based Deep Coverage Proteome: Evaluation of Cellular Protein Extraction Methods

XU Xia1, QIN Weida1, LI Ruomeng1, WANG Qianqian2, LIU Ning2, LI Gongyu1()   

  1. 1.Tianjin Key Laboratory of Biosensing and Molecular Recognition,Research Center for Analytical Sciences,College of Chemistry,Nankai University,Tianjin 300071,China
    2.State Key Laboratory of Medicinal Chemical Biology,Nankai University,Tianjin 300350,China
  • Received:2024-07-08 Online:2024-11-10 Published:2024-08-23
  • Contact: LI Gongyu E-mail:ligongyu@nankai.edu.cn
  • Supported by:
    the by the National Natural Science Foundation of China(22104064)

摘要:

综合评估了分别基于尿素(Urea)、 十二烷基硫酸钠(SDS)、 阴离子表面活性剂(BT)和新型总RNA抽提试剂(Trizol)的蛋白质提取方法, 旨在优化基于质谱的蛋白质组学的样品制备流程. 以HeLa细胞为例, 利用与质谱兼容的表面活性剂BT可显著缩短提取蛋白质的总时间, 减少样品制备过程中蛋白质的损失. 整合了4种蛋白质提取方法, 在不依赖柱前分馏技术的前提下, 从HeLa细胞中鉴定出超过7000个蛋白质; 并采用无标定量的方法定量测定了其中2990个蛋白质. 值得注意的是, BT法和SDS法在提取膜蛋白方面具有更高的效率, 而Urea法和Trizol法在提取细胞核和细胞质组分方面更有效. 研究结果为深度覆盖蛋白质组学提供了蛋白质提取的新型解决方案, 尤其在细胞蛋白提取方面, 通过整合质谱兼容型表面活性剂与传统提取方法, 有效提升了蛋白质鉴定数.

关键词: 表面活性剂, 蛋白提取, 蛋白质组学, 质谱

Abstract:

The current study comprehensively evaluates four different protein extraction methods based on urea, sodium dodecyl sulfate(SDS), anionic surfactants(BT), and total RNA extractor(Trizol), aiming to optimize the sample preparation workflow for mass spectrometry-based proteomics. Using HeLa cells as an example, we found that the method employing the mass spectrometry-compatible surfactant BT reagent significantly reduces the total time consumed for protein extraction and minimizes protein losses during the sample preparation process. Further integrating the four protein extraction methods, we identified over 7000 proteins from HeLa cells without relying on pre-fractionation techniques, and 2990 of them were quantified using label-free quantification. It is worth noting that the BT and SDS methods demonstrate higher efficiency in extracting membrane proteins, while the Urea and Trizol methods are more effective in extracting proteins from nuclear and cytoplasmic fractions. In summary, this study provides a novel solution for deep proteome coverage, particularly in the context of cellular protein extraction, by integrating mass spectrometry-compatible surfactants with traditional extraction methods to effectively enhance protein identification numbers.

Key words: Surfactant, Protein extraction, Proteomics, Mass spectrometry

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