相关实验视频
Updated: May 28, 2025

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Glycopeptide Capture for Cell Surface Proteomics
Published on: May 9, 2014
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由PNGaseF生成的N-Glycans在气相中添加到上
Valentina Rangel-Angarita1, Joann Chongsaritsinsuk1, Keira E Mahoney1
1Department of Chemistry, Yale University, New Haven, Connecticut 06511, United States.
Journal of the American Society for Mass Spectrometry
|February 12, 2025
概括
通过PNGaseF的消化,释放出N-甘氨酸,通过与一起形成添加物来干扰O-甘氨酸蛋白质组分析. 使用分子量切断过器去除这些自由甘氨酸可显著改善O-糖的检测和覆盖范围.
科学领域:
- 生物化学 生物化学
- 分析化学 分析化学
- 蛋白质组学是指蛋白质组学
背景情况:
- 糖蛋白组学,特别是O-糖蛋白组学,面临着包括信号抑制和搜索算法限制在内的挑战.
- 标准的O-glycoproteomic工作流通常使用PNGaseF消化来去除N-glycans,简化分析.
- 然而,释放的N-甘氨酸可以干扰随后的O-甘氨酸识别.
研究的目的:
- 在O-glycoproteomic分析中研究PNGaseF消化释放的N-甘氨酸的干扰.
- 确定释放的N-甘氨酸阻碍O-甘氨酸检测的机制.
- 开发一种方法来克服这一局限性,并改善O-糖蛋白组覆盖范围.
主要方法:
- 在O-glycoproteomic工作流程中利用PNGaseF消化.
- 分析了质谱数据,以识别干扰的N-甘氨酸及其添加物与.
- 采用分子量切断极限 (MWCO) 过方法,在消化之前去除释放的N-甘氨酸.
- 与MWCO过和不过的O-糖蛋白质组结果进行比较.
主要成果:
- 在数据采集过程中检测到识别的释放的N-甘氨酸,干扰O-甘氨酸分析.
- 观察到自由的N-甘氨酸在气相中与未经修改的一起形成添加物,导致误认为O-甘氨酸.
- 在多个实验数据集中证实了干扰自由甘氨酸的存在.
- 证明MWCO过有效地去除释放的N-糖.
结论:
- 从PNGaseF消化中释放的N-glycans在O-glycoproteomic分析中构成了重大挑战.
- 在 (glyco) 蛋白酶消化之前的MWCO过是一种有效的策略,可以去除干扰的N-glycans.
- 这种方法通过防止错误识别和改进信号检测来提高O-糖蛋白组覆盖率和准确性.
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