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Updated: Jan 9, 2026

Analyzing Protein Architectures and Protein-Ligand Complexes by Integrative Structural Mass Spectrometry

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Published on: October 15, 2018

渐进的碰撞能量通过消除周期性离子的位置偏差来改善蛋白质化识别

Zhao-Yu Zhu^1,2, Peng-Zhi Mao^2,3, Ching Tarn^2,3

¹Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China.

Communications chemistry

|December 9, 2025

概括

氨酸化在的位置显著影响周期性离子生成. 一种新的阶段性碰撞解离方法提高了蛋白质组学中的化鉴定效率和可靠性.

科学领域:

基于质谱的蛋白质组学.
翻译后的修改分析.

背景情况:

循环离子是酸化 lysine 的关键标记物.
影响它们发电效率的因素尚不清楚.

研究的目的:

调查控制循环离子生成效率的原则.
为蛋白质化分析制定一个优化的策略.

主要方法:

对离子生成的"位置效应"进行系统的调查.
使用了lysargiNase消化和同位素标记的合成.
应用了一种分阶段的高能碰撞解离 (HCD) 策略.

主要成果:

发现了一个强大的"位置效应",有利于在N端附近产生离子.
证明该效应与b型碎片离子不稳定性有关.
实现了增强的序列覆盖和强大的循环离子检测 (~99%) 通过步骤HCD.

结论:

提供了对离子形成的基本理解.
建立了蛋白质化最佳的获取和分析策略.
提高了乙化识别的深度,可靠性和速度.

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