UFMylation通过激活duebiquitinase BAP1来维持瘤抑制剂pVHL的稳定性
Xiao Yang1, Yalei Wen2, Shengying Qin3,4
1State Key Laboratory of Bioactive Molecules and Druggability Assessment/International Cooperative Laboratory of Traditional Chinese Medicine Modernization and Innovative Drug Development of Ministry of Education (MOE) of China/College of Pharmacy, Jinan University, Guangzhou 510632, China.
Science advances
|July 11, 2025
概括
BRCA1相关蛋白1 (BAP1) 通过稳定pVHL蛋白来抑制结直肠癌 (CRC). BAP1的UFMylation对于这种瘤抑制功能至关重要,其损失与CRC预后不佳有关.
科学领域:
- 分子生物学分子生物学
- 癌症研究 癌症研究
- 生物化学 生物化学
背景情况:
- 在结直肠癌 (CRC) 中,BRCA1相关蛋白1 (BAP1) 的作用尚未完全理解.
- 根据细胞环境,BAP1可以作为瘤抑制剂或瘤基因.
研究的目的:
- 研究BAP1影响结直肠癌进展的机制.
- 探索BAP1在CRC中的瘤抑制功能中的翻译后修饰的作用.
主要方法:
- 研究了BAP1与希佩尔-林道瘤抑制蛋白 (pVHL) 的相互作用和调节.
- 使用UFMylation试验检查BAP1修饰在特定的氨酸残留物 (Lys51,Lys61,Lys187,Lys205).
- 采用基于细胞系和患者衍生的异种移植模型来评估BAP1 UFMylation对瘤进展的影响.
主要成果:
- BAP1通过去化和稳定pVHL来抑制CRC的进展.
- BAP1经历了UFMylation,这增强了它与pVHL的相互作用和稳定.
- 失去BAP1 UFMylation (通过UFL1耗尽或BAP1 4KR突变) 损害了pVHL稳定,并促进了CRC的进展.
- UFL1和BAP1的下调与减少的pVHL水平和CRC患者的更差预后相关.
结论:
- 通过UFMylation确定了一种通过UFMylation调节BAP1活动的新型后翻译机制.
- 在结直肠癌中,UFMylation对于维持pVHL的瘤抑制功能至关重要.
- 向BAP1UFMylation为CRC和其他具有野生型BAP1和VHL的癌症提供了潜在的治疗策略.
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