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Updated: May 10, 2025

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开发用于低输入向蛋白质组的快速测试,使用多功能线性离子陷

Ariana E Shannon^1,2, Rachael N Teodorescu¹, No Joon Song¹

¹Pelotonia Institute for Immuno-Oncology, The Ohio State University Comprehensive Cancer Center, Columbus, OH, 43210, USA.

Nature communications

|April 22, 2025

概括

本研究介绍了一种具有成本效益的质谱工作流程,用于使用线性离子陷 (LIT) 的向蛋白质组学. 该方法可以在没有高质量精度仪器的情况下,从小样本中精确量化低丰度蛋白质.

科学领域:

生物化学生物化学
分析化学分析化学
质谱测量质量谱测量

背景情况:

高质量精度仪器通常需要在有限的细胞群体上进行蛋白质组学.
三重四极仅限于向蛋白质组学,而线性离子陷 (LIT) 则提供了多功能性.
研究实验室需要具有成本效益的,可访问的质谱学解决方案.

研究的目的:

用混合四极-LIT仪器描述开发针对全球数据独立采集 (DIA) 测量的向蛋白质组学测试的工作流.
为了证明这个工作流能够在没有高质量精度的情况下量化低水平蛋白质.
在复杂的生物样本中验证方法的性能.

主要方法:

使用混合四极-LIT质谱仪器.
开发了一种自动化的软件方法来安排并行反应监测 (PRM) 试验.
执行全球数据独立获取 (DIA) 来生成测试参数.
在1 ng背景蛋白质组中量化低丰度蛋白质.

主要成果:

在一个匹配的矩阵背景中,在三个数量级实现了一致的量化.
对于像转录因子和细胞因子这样的低级蛋白质,已经证明了两级以下的定量线性.
从1 ng样本中显示T细胞子集的流细胞计和基于LIT的蛋白质组学之间的一致性.
在不需要稳定同位素标记标准的情况下验证了该方法.

结论:

混合四极LIT仪器为向蛋白质组学提供了有价值和可访问的解决方案.
描述的工作流程使得从有限的样本中快速开发测试和敏感蛋白质量化.
这种方法扩大了各种实验室环境中质谱的可访问性.

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