Biophysical and structural insight into the USP8/14-3-3 interaction

Biophysical and structural insight into the USP8/14-3-3 interaction
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DOI:
10.1002/1873-3468.13017
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发表时间:
2018-04-01
期刊:
影响因子:
3.5
通讯作者:
Ottmann, Christian
Ottmann, Christian
中科院分区:
生物学3区
文献类型:
--
作者:
Centorrino, Federica;Ballone, Alice;Ottmann, Christian

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泛素特异性蛋白酶 8 (USP8)/14-3-3 蛋白质-蛋白质相互作用最近被证明在库欣病 (CD) 的发病机制中发挥着重要作用。 USP8 是一种去泛素酶,可防止表皮生长因子受体 (EGFR) 降解。 14-3-3 结合受损会导致 EGFR 去泛素化程度更高,并导致 EGFR 信号传导增强和促肾上腺皮质激素产生增加。在这里,我们报告了 USP8 的 14-3-3 结合基序围绕 Ser718 与 14-3-3 zeta 的复合物的高分辨率晶体结构,并表征了与荧光偏振和等温滴定量热法的相互作用。此外,我们分析了 CD 中发现的 USP8 突变对与 14-3-3 结合的影响。
The ubiquitin-specific protease 8 (USP8)/14-3-3 protein-protein interaction has recently been shown to exert a significant role in the pathogenesis of Cushing's disease (CD). USP8 is a deubiquitinase that prevents epidermal growth factor receptor (EGFR) degradation. Impairment of 14-3-3 binding leads to a higher deubiquitination of EGFR and results in a higher EGFR signaling and an increased production of adrenocorticotropic hormone. Here we report the high-resolution crystal structure of the 14-3-3 binding motif of USP8 surrounding Ser718 in complex with 14-3-3 zeta and characterize the interaction with fluorescence polarization and isothermal titration calorimetry. Furthermore, we analyze the effect of USP8 mutations identified in CD on binding to 14-3-3.