Global and Site-Specific Effect of Phosphorylation on Protein Turnover.

Global and Site-Specific Effect of Phosphorylation on Protein Turnover.
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磷酸化对蛋白质更新的全球和位点特异性作用。

DOI:
10.1016/j.devcel.2020.10.025
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发表时间:
2021-01-11
期刊:
影响因子:
11.8
通讯作者:
Liu Y
Liu Y
中科院分区:
生物学1区
文献类型:
--
作者:
Wu C;Ba Q;Lu D;Li W;Salovska B;Hou P;Mueller T;Rosenberger G;Gao E;Di Y;Zhou H;Fornasiero EF;Liu Y

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迄今为止,尚未系统地阐明特定修饰类型和位点对蛋白质寿命的影响。在这里,我们描述了一种蛋白质组学方法,DeltaSILAC,以定量评估位点特异性磷酸化对活细胞中数千种蛋白质周转的影响。基于准确且可重复的质谱法、使用细胞中稳定同位素标记的氨基酸的脉冲标记方法(pSILAC)、磷酸蛋白质组学和独特的肽水平匹配策略,我们的DeltaSILAC分析揭示了许多磷酸化位点的全球性、意想不到的延迟效应蛋白质周转。我们进一步发现,磷酸化位点加速蛋白质周转功能选择细胞健身,丰富的细胞周期蛋白依赖性激酶底物,进化保守,而磷酸化位点周围的谷氨酸显着延迟蛋白质周转。我们的方法代表了一种可推广的方法,并提供了丰富的资源,优先考虑磷酸化位点对蛋白质表达寿命的影响,在细胞信号传导和疾病生物学的背景下。通过开发和应用基于大规模质谱的方法,Wu和Ba等人定量评估了磷酸化对蛋白质表达的稳定和不稳定作用。研究结果表明,磷酸化以位点特异性的方式影响蛋白质降解,这与周围的氨基酸,局部结构和磷蛋白功能有关。
To date, the effects of specific modification types and sites on protein lifetime have not been systematically illustrated. Here, we describe a proteomic method, DeltaSILAC, to quantitatively assess the impact of site-specific phosphorylation on the turnover of thousands of proteins in live cells. Based on the accurate and reproducible mass spectrometry, a pulse labeling approach using stable isotope-labeled amino acids in cells (pSILAC), phosphoproteomics, and a unique peptide-level matching strategy, our DeltaSILAC profiling revealed a global, unexpected delaying effect of many phosphosites on protein turnover. We further found that phosphorylated sites accelerating protein turnover are functionally selected for cell fitness, enriched in Cyclin-dependent kinase substrates, and evolutionarily conserved; whereas the Glutamic acids surrounding phosphosites significantly delay protein turnover. Our method represents a generalizable approach and provides a rich resource for prioritizing the effects of phosphorylation sites on protein expression lifetime in the context of cell signaling and disease biology. By developing and applying a large-scale mass spectrometry-based method, Wu and Ba et al. quantitatively assessed the stabilizing and destabilizing effects of phosphorylation on protein expression. The findings revealed that phosphorylation impacts protein degradation in a site-specific manner, which is associated with surrounding amino acids, local structure, and phosphoprotein functions.
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