在p53信号传递中对USP28细胞功能的药理查询
Ariana S Bratt1, Susan Kilgas2, Maria I Tarazona Guzman1
1Department of Cancer Biology and the Linde Program in Cancer Chemical Biology, Dana-Farber Cancer Institute, Boston, MA 02215, USA; Department of Biological Chemistry & Molecular Pharmacology, Harvard Medical School, Boston, MA 02115, USA.
Cell chemical biology
|September 3, 2025
概括
研究人员开发了CAS-010,一种针对USP28 (双化酶) 的特定抑制剂,以研究其在p53信号传递和细胞命运中的作用. 这种化学探测器有助于了解无处不在的信号通路.
科学领域:
- 生物化学
- 分子生物学
- 化学生物学
背景情况:
- 解化酶 (DUBs) 调节关键细胞过程,包括蛋白质降解.
- 由于缺乏特定的化学探测器,因此难以理解DUB的功能.
- USP28是一种涉及各种细胞通路的DUB,但其精确的作用需要进一步调查.
研究的目的:
- 为USP28开发和验证一个特定的化学探针.
- 调查USP28在p53的作用和53BP1-USP28的相互作用.
- 为研究USP28在细胞周期控制和细胞命运中的功能提供工具.
主要方法:
- 开发CAS-010,一种与ubiquitin竞争的USP28抑制剂.
- 基于结构的药物设计和SAR分析用于抑制剂选择性.
- 生物化学测试以确定抑制剂的强度和选择性.
- 基于细胞的测试以验证对p53的目标效应.
- 研究CAS-010对53BP1-USP28相互作用的影响.
主要成果:
- CAS-010被确定为一种低纳米级的选择性USP28抑制剂,对USP25有一定的活性.
- 晶体结构合理化了抑制剂选择性和SAR趋势.
- 通过CAS-010验证了p53的目标抑制.
- 证明CAS-010破坏了53BP1-USP28的相互作用,突出显示了USP28的催化作用.
- 开发了一个负对照 (WPT-086) 和耐抑制剂突变,用于进一步研究.
结论:
- CAS-010是研究USP28的经过验证的化学工具.
- 对于53BP1- USP28的相互作用,USP28的催化活性至关重要.
- 这些工具将促进USP28在p53介导的细胞周期控制和细胞命运决定中的作用的研究.
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