USP7与SET上蛋白相互作用并使其不稳定
Jianyuan Chen1, Zishan Jiao1, Yajing Liu1
1State Key Laboratory of Common Mechanism Research for Major Diseases & Department of Medical Genetics, Institute of Basic Medical Sciences & School of Basic Medicine, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100005, China.
Biochemical and biophysical research communications
|March 31, 2024
概括
这项研究确定了泛素特异性蛋白酶7 (USP7) 作为蛋白SE转位 (SET) 的调节者. USP7 破坏了 SET 蛋白水平的稳定性,为癌症治疗提供了一个新的目标.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 生物化学 生化学
背景情况:
- 上蛋白SE转位 (SET) 在各种癌症中过度表达,与患者预后不佳相关.
- 准SET是一种有前途的癌症干预策略,但其监管机制尚不清楚.
- 了解SET监管对于开发有效的癌症疗法至关重要.
研究的目的:
- 为了识别调节蛋白SET的蛋白质.
- 为了研究在SET调节中泛素特异性蛋白酶7 (USP7) 的作用.
- 阐明USP7和SET之间的相互作用.
主要方法:
- 串联亲和性净化质谱法 (TAP-MS) 用于识别相互作用的蛋白质.
- 共同免疫沉和西部涂抹以确认蛋白质复合体的形成.
- USP7 敲击实验,以评估对SET水平的影响.
主要成果:
- 在癌细胞中,USP7与SET形成稳定的复合体.
- SET的酸性域与USP7结合;USP7的催化和UBL域是结合所需的.
- USP7 knockdown 增加了 SET 蛋白质水平而不会影响 SET mRNA,这表明了转录后调节.
- USP7被确定为第一个与SET.结合的二维基因酶 (DUB).
结论:
- USP7 破坏了对coprotein SET 的稳定,可能是通过间接机制.
- USP7在控制SET蛋白的稳定性方面发挥了新的监管作用.
- 这种相互作用为涉及SET过度表达的癌症提供了潜在的新治疗标.
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