PhoXplex:将富含的交叉链接与同位素标记相结合,用于蛋白质接口的定量蛋白质宽映射
Runa D Hoenger Ramazanova1, Theodoros I Roumeliotis1, James C Wright1
1Functional Proteomics team, Chester Beatty Laboratories, The Institute of Cancer Research, London SW3 6JB, United Kingdom.
Journal of proteome research
|October 18, 2024
概括
这项研究介绍了PhoXplex,这是一个新的工作流程,结合了交叉链接质谱法 (XL-MS) 和TMT标签,用于大规模的蛋白质结构分析. 它可以详细地绘制蛋白质相互作用和跨细胞系的结构变化.
科学领域:
- 结构生物学 结构生物学
- 蛋白质组学是指蛋白质组学.
- 生物化学 生物化学
背景情况:
- 交联质谱法 (XL-MS) 提供了对蛋白质结构和相互作用的洞察.
- 将XL-MS应用于全细胞样本面临深度和吞吐量方面的挑战.
- 可丰富的交叉链接器和定量方法可以增强蛋白界面检测.
研究的目的:
- 开发一个精简的工作流程,用于全球检测细胞中的差异性结构特征.
- 为了进行增强的分析,将富交叉链与TMT标签相结合.
- 为了使蛋白质结构属性和相互作用的比较表征.
主要方法:
- 开发了PhoXplex工作流程,整合了富交叉链接和TMT标签.
- 将工作流应用于一组细胞系,进行全球蛋白质组范围的分析.
- 利用AlphaFold预测和疾病蛋白质注释来解释数据.
主要成果:
- 实现了深度覆盖,量化了9000多个交叉链接和长环链接.
- 确定了潜在的新型蛋白质-蛋白质相互作用和结构特征.
- 能够探索定量交叉链接数据以将突变与蛋白质结构联系起来.
结论:
- PhoXplex为大规模的蛋白质接口比较分析提供了一种强大的方法.
- 工作流有助于研究不同细胞群体的结构特征差异.
- 未来的前景包括解决更深入的全细胞分析的局限性.
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