量化化学蛋白质组学方法用于识别翻译后修饰介导的蛋白质-蛋白质相互作用
Xiang Li1, Emily A Foley, Kelly R Molloy
1Laboratory of Chemistry and Cell Biology, The Rockefeller University, New York, New York 10065, USA.
Journal of the American Chemical Society
|January 14, 2012
概括
研究人员开发了一种新的方法来识别由翻译后修改 (PTM) 调节的蛋白质相互作用. 这种技术成功地确定了MORC3作为三甲基化组素H3氨酸4 (H3K4Me3) 的新型结合伙伴.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 蛋白质组学是指蛋白质组学.
背景情况:
- 翻译后修饰 (PTMs) 调节了对细胞功能至关重要的蛋白质-蛋白质相互作用.
- 检测PTM已经确立,但对PTM依赖的相互作用进行分析仍然具有挑战性.
- 基因组甲基化,特别是H3K4Me3,与活性基因促进体有关.
研究的目的:
- 开发和验证一种用于识别PTM-依赖的蛋白质-蛋白质相互作用的新方法.
- 调查与H3K4Me3.3相关的蛋白质相互作用.
- 为了发现与H3K4Me3.3结合的新蛋白质.
主要方法:
- 基于细胞培养 (SILAC) 的定量质谱学中结合光交联策略与稳定同位素标记.
- 应用了该方法来研究三甲基化氨酸-4在基因素H3 N-终端 (H3K4Me3) 的研究.
- 使用交叉链接辅助和基于SILAC的蛋白质识别 (CLASPI).
主要成果:
- 成功鉴定出已知识别H3K4Me3.3的蛋白质.
- 发现MORC3是一种与H3K4Me3.3结合的新型蛋白质.
- 证明了CLASPI方法在分析PTM介导相互作用方面的实用性.
结论:
- 克拉斯皮方法对于识别PTM依赖的蛋白质与蛋白质相互作用是有效的.
- 这种方法推进了对氨酸甲基化介导相互作用的研究.
- 这些发现扩大了我们对与基因素修饰相关的蛋白质相互作用体的理解.
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