对FAIMS进行分析,用于使用轨道升三杂质质谱仪研究亲和纯化蛋白质复合体
Pratik Goswami1, Joseph Cesare1,2, Michaella J Rekowski1
1Department of Cancer Biology, University of Kansas Medical Center, Kansas City, KS, 66160, USA.
bioRxiv : the preprint server for biology
|December 16, 2024
概括
高场不对称波形离子流动性光谱法 (FAIMS) 提高了亲和净化质谱法 (AP-MS) 的灵敏度,并减少了污染物. 这种方法显著增加了蛋白质和的检测,以进行更深入的蛋白质组分析.
科学领域:
- 蛋白质组学是指蛋白质组学.
- 分析化学 分析化学
- 生物化学 生化学
背景情况:
- 亲和净化质谱 (AP-MS) 对于识别蛋白质复合体至关重要.
- 提高AP-MS中的灵敏度和减少污染物对于全面的蛋白质组分析至关重要.
研究的目的:
- 评估高场不对称波形离子流动性光谱学 (FAIMS) 与AP-MS的纳米LC-MS的集成.
- 评估FAIMS对检测SAP25蛋白质复合物的灵敏度,稳定性和污染物减少的影响.
主要方法:
- 亲和净化质谱 (AP-MS) 结合纳米LC-MS.
- 在nanoLC-MS和一个轨道飞行器上升三杂质质谱仪之间集成高场不对称波形离子移动性光谱学 (FAIMS).
- 对纳米LC-FAIMS-MS与纳米LC-MS (没有FAIMS) 进行SAP25蛋白质复合体分析的比较分析.
主要成果:
- 纳米LC-FAIMS-MS显著提高了蛋白质和水平的灵敏度和检测极限.
- FAIMS 增加了 42% 的总蛋白质和 92% 的独特蛋白质.
- FAIMS增加了44%的总和88%的独特,同时减少了化学污染物和缺失值 (<15%).
结论:
- FAIMS集成可以提高AP-MS数据的深度和质量.
- FAIMS与Orbitrap Ascend Tribrid质谱仪的接口为敏感的蛋白质组学研究提供了一个强大的方法.
- 这种方法对于过污染物和减少复杂生物样本中缺失值非常有价值.
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