综合的二维液态染色学-高分辨率质谱学,用于使用平行梯度进行复杂的蛋白质消化分析
Rick S van den Hurk1,2, Bart Lagerwaard1,2, Nathan J Terlouw1,2
1Analytical Chemistry Group, Van't Hoff Institute for Molecular Sciences, University of Amsterdam, Amsterdam1098 XH,The Netherlands.
Analytical chemistry
|May 17, 2024
概括
本研究引入了用于蛋白质消化剂的高分辨率质谱 (LC × LC-HRMS) 综合二维液态色谱的平行梯度. 这种方法提高了与转移梯度和1D-LC.相比的灵敏度和鉴定.
科学领域:
- 蛋白质组学是指蛋白质组学
- 分析化学 分析化学
- 染色体学 染色体学 是一种染色学.
背景情况:
- 在线全面的二维液态色谱与高分辨率质谱学 (LC × LC-HRMS) 相结合,为复杂样品提供高峰容量.
- 然而,由于二维 (2D) 中的高流速,敏感性降低,限制了其在蛋白质消化分析中的应用.
研究的目的:
- 开发和评估一个RPLC×RPLC-HRMS方法,使用并行梯度来提高灵敏度和鉴定.
- 为了比较平行梯度与转移梯度的性能和1D-RPLC方法.
主要方法:
- 开发一种具有平行梯度的RPLC × RPLC-HRMS方法 (0.7mLmin-1 2D流速).
- 与转移梯度方法 (1.4 mL min-1 2D 流速) 和 1D-RPLC 的比较.
- 使用QExactive-PlusMS的细胞线消化样本的分析.
主要成果:
- 与转移的梯度相比,平行梯度显著增加了MS强度 (3x) 和鉴定 (3900vs2600).
- 将调制时间缩短到10秒增加了MS/MS事件.
- 与1D-RPLC相比,具有平行梯度的RPLC × RPLC-HRMS提高了分离性能和增加了分析物识别 (7000个,1990个蛋白质).
结论:
- 在RPLC × RPLC-HRMS的平行梯度提高了复杂蛋白质消化的灵敏度和分析深度.
- 这种方法比1D-RPLC提供了优越的分离性能,具有可管理的灵敏性权衡.
- 该方法有望在蛋白质组学研究中得到更广泛的应用.
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