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Peptide Identification Using Tandem Mass Spectrometry

Peptide Identification Using Tandem Mass Spectrometry

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.
This technique helps gather information regarding the protein from which the peptide was obtained and to study the peptides’ amino acid sequence. Identifying peptides from a complex mixture is an important component of the growing field of...

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Updated: Jan 16, 2026

A Hydrogen-Deuterium Exchange Mass Spectrometry HDX-MS Platform for Investigating Peptide Biosynthetic Enzymes

A Hydrogen-Deuterium Exchange Mass Spectrometry HDX-MS Platform for Investigating Peptide Biosynthetic Enzymes

Published on: May 4, 2020

保留时间插值增强了对HDX-MS的片映射.

Damon Griffiths^1,2, Juan P Rincon Pabon^1,2, Charlotte Guffick^1,2

¹Faculty of Biology, Medicine and Health, Division of Molecular and Cellular Function, The University of Manchester, Manchester, M13 9PT, U.K.

Journal of the American Society for Mass Spectrometry

|September 26, 2025

概括

这项研究介绍了RTinterpolator,一个R脚本,通过使用长液态染色学 (LC) 梯度用于映射来增强/交换质谱学 (HDX-MS). 这种方法可以改善的识别和序列覆盖,而不会影响的保留.

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相关实验视频

Last Updated: Jan 16, 2026

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Published on: May 4, 2020

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科学领域:

生物化学和分子生物学
分析化学分析化学
蛋白质组学是指蛋白质组学.

背景情况:

/交换质谱 (HDX-MS) 对于研究蛋白质结构动态至关重要.
有效的片映射对于准确的HDX-MS分析至关重要,需要高序列覆盖率和冗余性.
在HDX-MS工作流程中,短液态色谱 (LC) 梯度限制了由于反向交换限制的鉴定.

研究的目的:

开发一个灵活的工作流程,克服HDX-MS中短LC梯度的局限性.
在HDX-MS实验中增强标识,序列覆盖和冗余性.
为了使长LC梯度的丰富图可以在不影响保留的情况下使用.

主要方法:

引入了使用长LC梯度进行初始映射的工作流,随后进行保留时间 (RT) 插值.
创建了一个回归模型,使用从长度和短度梯度映射中共享的来预测短度梯度RT.
使用"RTinterpolator"实现了该方法,这是一个与HDX分析平台兼容的自由可用的R脚本.

主要成果:

该RTinterpolator工作流成功地预测了长梯度实验中识别的的短梯度RTs.
这种方法可以利用HDX-MS.的约束范围内的长度梯度的全面基图.
在HDX-MS数据中增加了序列覆盖率和冗余性,特别是在复杂蛋白质样本中.

结论:

RTinterpolator为改善HDX-MS数据质量提供了一种实用且易于使用的解决方案.
该方法独立于仪器,并增强了HDX-MS研究的信息内容.
方便对蛋白质结构动态进行更详细的分析,特别是对于具有挑战性的蛋白质标.