非催化性UBL2域将duebiquitinaseUSP11引导到与K48结合的多比基因链
Sin-Rong Lee1, Han-Hsiun Chen1, Ruey-Hwa Chen1
1Institute of Biological Chemistry, Academia Sinica, Taipei, Taiwan; Institute of Biochemical Sciences, College of Life Science, National Taiwan University, Taipei, Taiwan.
The Journal of biological chemistry
|November 9, 2025
概括
在USP11蛋白中的UBL2域是它选择性地切割K48连接的泛素链的关键. 这一发现有助于开发针对USP11相关疾病的向疗法,例如癌症和神经退行.
科学领域:
- 生物化学 生化学
- 分子生物学分子生物学
- 药物发现 药物发现 药物发现
背景情况:
- 乌比基因特异蛋白酶 (USP) 是关键的二维基因酶,但它们的链型选择性通常是有限的.
- 涉及癌症和神经退行症的USP11具有异常结构,具有分裂的催化域.
- 由于相互矛盾的实验数据,USP11的精确链选择性一直受到争议.
研究的目的:
- 研究UBL2内在无序区域 (IDR) 在USP11的二维基丁酶活性和链选择性中的作用.
- 为潜在的治疗应用确定USP11的选择性抑制剂.
主要方法:
- 在实验室测试中使用了Ub-四胺和无处不在的蛋白质.
- 基于细胞的分析以评估USP11活体中的活性.
- 基于人工智能的虚拟查用于抑制剂识别.
主要成果:
- UBL2-IDR显著改变了USP11的裂变偏好,特别是对于K48连接的无处不在链.
- 通过UBL2介导的USP11的K48选择性与其类似的USP4和USP15不同.
- 人工智能查确定了FDA批准的药物 (芬诺多帕姆,奥兰扎宾) 和类似物作为具有体外和细胞疗效的选择性USP11抑制剂.
结论:
- UBL2域对USP11的K48连接的泛素链选择性至关重要,揭示了一个新的调节机制.
- 非催化域在杜比基酶的功能和选择性中起着至关重要的作用.
- 已识别的USP11抑制剂为开发针对USP11相关疾病的向治疗提供了有希望的基础.
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