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Tandem mass spectrometry is a technique that uses multiple mass analyzers in series to obtain a higher selectivity and reduce chemical noise during analyte detection. Instruments with multiple analyzers separated by an interaction cell enable secondary fragmentation and selected study of the fragment ions.Secondary fragmentations occur in the interaction cell and can be induced by various factors. Fragmentation induced by collision with inert gases, such as N2, Ar, He, etc., is called...
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When proton-coupled carbon-13 spectra are simplified by a broadband proton decoupling technique, structural information about the coupled protons is lost. Distortionless enhancement by polarization transfer (DEPT) is a technique that provides information on the number of hydrogens attached to each carbon in a molecule. While the DEPT experiment utilizes complex pulse sequences, the pulse delay and flip angle are specifically manipulated. The resulting signals have different phases depending on...
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Tandem mass spectrometry, also known as MS/MS or MS2, is an analytical technique that employs two mass analyzers. Essentially it is a series of mass spectrometers that helps isolate a particular biomolecule and then helps study its chemical properties.
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通过快速循环诊断-PASEF方法的保留时间下方采样来增强识别和量化.

Christopher R Below1, Oliver M Bernhardt1, Stephanie Kaspar-Schönefeld2

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在timsTOF HT上优化对角-PASEF与保留时间总和 (RTsum) 显著提高了蛋白质组量化. 与标准方法相比,这种新的方法可以改善信号噪声比率,并增加和蛋白质的识别.

关键词:
通过dia-PASEF截面-PASEF 是一个简单的方法.发现 蛋白质组学

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科学领域:

  • 质谱测量质量谱测量
  • 蛋白质组学是指蛋白质组学
  • 分析化学是一种分析化学.

背景情况:

  • 数据独立采集 (DIA) 质谱对于全面的蛋白质组量化至关重要.
  • 诊断-PASEF是timsTOF平台上的一个先进的获取方法,用于改进前体离子分析.
  • 对于常规应用,需要进一步优化对角-PASEF工作流程.

研究的目的:

  • 系统地优化对角-PASEF在17分钟梯度上的时间TOF HT上的获取.
  • 通过将对角-PASEF与保留时间总和 (RTsum) 结合起来,开发和验证一种增强的分析策略.
  • 为了比较优化的对角-PASEF策略与标准的对角-PASEF方法的性能.

主要方法:

  • 在 timsTOF HT仪器上对对角-PASEF采集参数的系统优化.
  • 将保留时间总和 (RTsum) 与对角-PASEF数据采集集成.
  • 使用 Spectronaut 软件进行数据分析的性能评估.
  • 用细胞系样本的不同输入量进行定量实验.

主要成果:

  • "光谱探测器"完全支持对角-PASEF方法,用户干预最小.
  • RTsum与对角PASEF的结合提高了信号噪声比和峰值形状.
  • 这种综合策略显著增加了和蛋白质识别的数量,而不是标准的PASEF.
  • 用RTsum进行的Diagonal-PASEF在受控实验中表现出卓越的定量精度和识别率.

结论:

  • 与RTsum相结合的Diagonal-PASEF代表了深度蛋白质组定量化的强大策略.
  • 这种优化的工作流提供了对现有的DIA方法的有竞争力的替代方案,提高了识别深度和定量准确性.
  • RTsum有效地利用了对角-PASEF的高采样率,提高了其在蛋白质组分析中的实用性.