USP15通过使MeCP2脱和稳定MeCP2来抑制缺氧诱导的IL-6信号传递
Zi-Tong Zhang1, Shu-Xuan Niu1, Chen-Hao Yu1
1School of Pharmacy, Tongji Medical College and State Key Laboratory for Diagnosis and Treatment of Severe Zoonotic Infectious Diseases, Huazhong University of Science and Technology, Wuhan, China.
The FEBS journal
|October 8, 2024
概括
乌比奎丁特异性蛋白酶15 (USP15) 稳定了甲基-CpG结合蛋白2 (MeCP2),通过防止其在缺氧下降解. 这种调节会影响IL-6 (IL-6) 信号传递,从而提供有关神经发育障碍的见解.
科学领域:
- 分子生物学分子生物学
- 神经科学是一个神经科学.
- 生物化学 生物化学
背景情况:
- 甲基-CpG结合蛋白2 (MeCP2) 对神经发育至关重要;其失调导致Rett和MECP2重复综合征.
- MeCP2的表达非常重要,功能丧失突变导致严重的神经发育障碍.
- 之前的研究表明,MeCP2通过抑制IL-6/STAT3信号来保护脏免受缺血-再输液损伤 (IRI).
研究的目的:
- 阐明在低氧条件下调节MeCP2蛋白稳定性的机制.
- 为了确定参与细胞应激期间MeCP2上调调节的因素.
- 了解MeCP2稳定在调节炎症信号通路中的作用.
主要方法:
- 在细胞模型中利用低氧和再氧化和化刺激来模拟低氧条件.
- 采用了对二基化酶库的无偏查,以确定MeCP2调节器.
- 研究了USP15和MeCP2之间的相互作用,重点研究了泛化和降解途径.
主要成果:
- 在MeCP2上去除 lysine 48-linked ubiquitination,可以防止其在低氧状态下的蛋白质体降解.
- 乌比基特异蛋白酶15 (USP15) 被确定为MeCP2.2的一个关键稳定剂.
- USP15二基化MeCP2,抑制缺氧诱导的降解和随后的IL-6/STAT3通路激活.
结论:
- 在低氧压力下,USP15在维持MeCP2稳定性方面发挥着至关重要的作用.
- USP15通过去除与K48结合的泛素链来调节MeCP2的稳定性,主要来自MeCP2的C终端域.
- USP15-MeCP2相互作用为IL-6信号提供了一个新的调节机制,并对神经发育障碍产生影响.
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