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通过SLIM集成提高低负载蛋白质学轨道轨道工作流程的灵敏度.

Liulin Deng1, Brian Adamson2, Alan McKenzie-Coe1

  • 1MOBILion Systems, Inc., 4 Hillman Drive, Suite 130, Chadds Ford, Pennsylvania 19317, United States.

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概括

一个新的结构无损离子操纵轨道探测器480 (SLIM-OE) 系统提高了离子移动性质谱 (IM-MS) 的灵敏度,达到190倍. 这一进步显著改善了蛋白质组学分析,特别是对于较少的样本量.

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科学领域:

  • 分析化学 分析化学
  • 质谱测量质量谱测量
  • 蛋白质组学是指蛋白质组学.

背景情况:

  • 离子移动性质谱 (IM-MS) 提供了增强的分离能力.
  • 现有的IM-MS平台面临复杂生物样本的灵敏度和吞吐量方面的局限性.
  • 为低样本负载保护学优化IM-MS需要先进的仪器.

研究的目的:

  • 开发和评估一个新的结构无损离子操纵轨道探测器480 (SLIM-OE) 平台.
  • 评估SLIM-OE在离子移动性分离和蛋白质组学分析方面的性能.
  • 为了证明在低样本负载场景中提高灵敏度和改善蛋白质识别.

主要方法:

  • 整合SLIM离子移动性分离与Orbitrap Exploris 480质谱仪.
  • 开发一种"分阶段IMS"模式,用于直接输液方法的开发.
  • 实现一个SLIM-enabled数据独立获取 (SLIM-DIA) 工作流程,用于LC-MS/MS蛋白质组学.

主要成果:

  • 与标准MS和MS/MS相比,在IM-MS和IM-MS/MS模式中实现了高达190倍的灵敏度增强.
  • 由于敏感度增加,对Qual/Quant QC Mix蛋白质的蛋白质覆盖率得到了改善.
  • 与标准DIA相比,SLIM-DIA从2 ng的HeLa溶解酸中确定了2.3倍多的蛋白质组,保持了定量准确性.

结论:

  • SLIM-OE平台显著提高了IM-MS灵敏度和蛋白质识别能力.
  • SLIM-DIA 工作流对于低样本负载蛋白质组学是有效的,比标准 DIA 提供了显著的改进.
  • 这项工作为开发下一代蛋白质组学高性能SLIM-Orbitrap仪器提供了基础.