一种化学蛋白质学方法来量化氨酸-化
Chloé Freyermuth1, Jean-William Dupuy2, Thibaud T Renault3
1Univ. Bordeaux, CNRS, Bordeaux INP, CBMN, UMR 5248, IECB, F-33600 Pessac, France.
ACS chemical biology
|January 13, 2026
概括
这项研究引入了一种新方法,可以精确量化蛋白质S-化,这是影响细胞功能和疾病的关键修改. 该工作流允许大规模的S-化分析,揭示了自过程中的动态变化.
科学领域:
- 生物化学 生物化学
- 蛋白质组学是指蛋白质组学.
- 细胞生物学 细胞生物学
背景情况:
- S-化 (S-palmitoylation) 是一种可逆的翻译后修饰,涉及脂肪酸添加到囊残留物中.
- 虽然质谱学已经确定了许多S-化蛋白,但在蛋白质组范围内的S-化水平的精确量化仍然具有挑战性.
- 准确的量化对于理解S-化在细胞过程,健康和疾病中的作用至关重要.
研究的目的:
- 开发和优化一个强大的工作流程,以精确,定量分析整个蛋白质组的S-化.
- 为了使生物样本中的单个氨酸残留物S-化水平的量化.
- 应用开发的工作流程来研究响应细胞刺激的动态S-化变化.
主要方法:
- 开发了一种量化工作流程,使用同位素试剂对自由和S-化氨酸残留物进行序列标记.
- 优化了工作流程,比较基因标记的探头和酸标记的捕获试剂,以确定地点.
- 集成工作流程与高场不对称波形离子移动谱学 (FAIMS) 结合LC-MS/MS用于分离.
主要成果:
- 在使用增强工作流程的生物样本中量化了超过17,000个独特的氨酸残留物.
- 成功地应用了工作流来量化HeLa细胞蛋白质组中的S-化水平.
- 在对自诱导的反应中确定了S-化中的动态变化.
结论:
- 开发的S-化量化工作流显著提高了测量全蛋白体S-化水平的能力.
- 这种方法提供了一个强大的工具,用于剖析S-化在细胞信号传递和疾病发病过程中的功能性作用.
- 工作流揭示了与自相关的动态S-化变化,突出了它在研究动态后翻译修改方面的实用性.
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