通过在酵母中以同位素标记的葡萄糖进行代谢标记来量化三重甘氨酸
Thao Thi Pham1, Ji-Yeon Kim1, Sami T Tuomivaara2
1Department of Chemistry, Changwon National University, Changwon, 51140, Republic of Korea.
Analytica chimica acta
|January 14, 2024
概括
这项研究引入了多糖的三重代谢同位素标记与同位素葡萄糖 (MILPIG) 增强的糖甘分析. 这种新的方法改善了生物研究的定量质谱,准确地测量了酵母细胞中的N-甘氨酸变化.
科学领域:
- 分析化学 分析化学
- 生物化学 生物化学
- 葡萄糖生物学 葡萄糖生物学
背景情况:
- 质谱法是分析生物分子 (如甘氨酸) 的强大工具.
- 稳定同位素标记增强了质谱学中的复杂化和定量准确性.
- 现有的方法面临着越来越复杂的生物复杂性的挑战.
研究的目的:
- 开发一种新的三倍同位素标记方法,用于糖分析.
- 为了提高糖的定量质谱的准确性和精度.
- 为了研究酵母细胞中的差异性N-糖甘配置文件.
主要方法:
- 开发了一种基于双重MILPIG的三重同位素标记方法,使用面包酵母.
- 使用三种不同标记的葡萄糖 (轻,中,重) 来标记N链 glycans.
- 应用了该方法来分析尼卡米辛治疗和控制酵母细胞中的N-糖甘配置文件.
主要成果:
- 成功标记了N链 glycans 中的单糖环,具有可预测的三重谱.
- 对于1:1:1的甘氨酸混合物的相对定量证明了出色的准确性和精度.
- 显示了N-甘氨酸对图尼卡米辛治疗的差异反应.
结论:
- 三倍MILPIG是一种准确和精确的定量甘氨酸分析方法.
- 该方法可以在生物系统中查询差异性糖甘配置文件.
- N-甘氨酸对尼胺素表现出不同的反应,为细胞过程提供了洞察力.
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