A ubiquitination-mediated degradation system to target 14-3-3-binding phosphoproteins.

A ubiquitination-mediated degradation system to target 14-3-3-binding phosphoproteins.
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DOI:
10.1016/j.heliyon.2023.e16318
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发表时间:
2023-05
期刊:
影响因子:
4
通讯作者:
Liu, Liu
Liu, Liu
中科院分区:
综合性期刊4区
文献类型:
--
作者:
Li, Zhaokai;Huang, Xiaoqiang;Li, Mohan;Chen, Eugene;Wang, Zhong;Liu, Liu

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14-3-3 结合基序的磷酸化参与许多细胞过程。基础研究非常需要一种能够靶向降解 14-3-3 结合磷蛋白 (14-3-3-BPP) 以研究其功能的策略。在这里,我们报告了一种磷酸化诱导的泛素蛋白酶体系统介导的靶向蛋白质降解(TPD)策略,该策略允许 14-3-3-BPP 的特异性降解。具体来说,通过将改良的 von Hippel-Lindau E3 连接酶与工程化 14-3-3 诱饵连接,我们生成了一种蛋白质嵌合体,称为 14-3-3 结合磷酸蛋白的靶向降解 (TDPP)。基于对 14-3-3 结合基序中磷酸化的特异性识别,TDPP 可作为 14-3-3-BPP 的通用降解剂。 TDPP 对二福平-EGFP 报告基因、通用和特异性 14-3-3-BPP 显示出高效率和特异性。 TDPP 还可用于 14-3-3-BPP 的验证。这些结果有力地支持了 TDPP 作为 14-3-3 相关研究的强大工具。
The phosphorylation of 14-3-3 binding motif is involved in many cellular processes. A strategy that enables targeted degradation of 14-3-3-binding phosphoproteins (14-3-3-BPPs) for studying their functions is highly desirable for basic research. Here, we report a phosphorylation-induced, ubiquitin-proteasome-system-mediated targeted protein degradation (TPD) strategy that allows specific degradation of 14-3-3-BPPs. Specifically, by ligating a modified von Hippel-Lindau E3-ligase with an engineered 14-3-3 bait, we generated a protein chimera referred to as Targeted Degradation of 14-3-3-binding PhosphoProtein (TDPP). TDPP can serve as a universal degrader for 14-3-3-BPPs based on the specific recognition of the phosphorylation in 14-3-3 binding motifs. TDPP shows high efficiency and specificity to a difopein-EGFP reporter, general and specific 14-3-3-BPPs. TDPP can also be applied for the validation of 14-3-3-BPPs. These results strongly support TDPP as a powerful tool for 14-3-3 related research.
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