Fourier Transform-Ion Mobility-Orbitrap Mass Spectrometer: A Next-Generation Instrument for Native Mass Spectrometry.

Fourier Transform-Ion Mobility-Orbitrap Mass Spectrometer: A Next-Generation Instrument for Native Mass Spectrometry.
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傅里叶变换 - 离子迁移 - 轨道阱质谱仪:一种用于天然质谱的下一代仪器

DOI:
10.1021/acs.analchem.8b02463
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发表时间:
2018-09-04
影响因子:
7.4
通讯作者:
Russell DH
Russell DH
中科院分区:
化学1区
文献类型:
--
作者:
Poltash ML;McCabe JW;Shirzadeh M;Laganowsky A;Clowers BH;Russell DH

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本文介绍了一种新的自然离子迁移质谱(IM-MS)仪器配置。通过使用耦合到RF离子漏斗的静态ESI源产生大分子离子,然后使用周期性聚焦漂移管IM分析仪和Orbitrap质谱仪对这些离子进行迁移率和质量分析。仪器的设计保留了第一原则的能力,确定旋转平均离子中性碰撞截面和高分辨率测量的完整蛋白质复合物的流动性和质量分析模式。IM模式中的操作利用FT-IMS模式(最初由Knorr(Knorr,F.等,Anal. 1985,57(2),402-406)),其提供了克服漂移管(DT)-IM和Orbitrap质量分析的固有占空比失配的手段。使用与小分子(分别为ADP和生物素)结合的蛋白质复合物Gln K(MW 44 kDa)和链霉亲和素(MW 53 kDa)以及与甲状腺素和锌结合的甲状腺素运载蛋白(MW 56 kDa)评价天然ESI-FT-DT-IM-Orbitrap MS仪器的性能。
A new instrument configuration for native ion mobility-mass spectrometry (IM-MS) is described. Macromolecule ions are generated by using a static ESI source coupled to an RF ion funnel, and these ions are then mobility and mass analyzed using a periodic focusing drift tube IM analyzer and an Orbitrap mass spectrometer. The instrument design retains the capabilities for first-principles determination of rotationally averaged ion-neutral collision cross sections and high-resolution measurements in both mobility and mass analysis modes for intact protein complexes. Operation in the IM mode utilizes FT-IMS modes (originally described by Knorr (Knorr, F. J. et al. Anal. Chem. 1985, 57(2), 402–406)), which provides a means to overcome the inherent duty cycle mismatch for drift tube (DT)-IM and Orbitrap mass analysis. The performance of the native ESI-FT-DT-IM-Orbitrap MS instrument was evaluated using the protein complexes Gln K (MW 44 kDa) and streptavidin (MW 53 kDa) bound to small molecules (ADP and biotin, respectively) and transthyretin (MW 56 kDa) bound to thyroxine and zinc.
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