通过促进DNA双链断裂修复,VGLL3调节化学敏感性
Wei Wu1,2, Zhenzhen Fan1,2, Hui Fu1,2,3
1China National Center for Bioinformation, Beijing 100101, China.
Science advances
|October 9, 2024
概括
遗传样3 (VGLL3) 蛋白对于DNA损伤反应 (DDR) 和同源重组至关重要. 它的耗尽会影响瘤发育和化疗敏感性.
科学领域:
- 分子生物学分子生物学
- 癌症研究 癌症研究
- 遗传学 是一个遗传学.
背景情况:
- 转录辅因子遗留样3 (VGLL3) 调节自身免疫和瘤的发展.
- 这些过程中VGLL3的精确机制尚未完全理解.
研究的目的:
- 研究VGLL3在DNA损伤反应 (DDR) 中的作用.
- 阐明VGLL3影响DDR和同源重组的分子机制.
主要方法:
- 研究了VGLL3对DNA损伤部位的招募.
- 评估了VGLL3枯竭对DNA修复蛋白积累的影响 (RNF8,RAD51).
- 分析了同源的重组效率和细胞对化疗药物的敏感性.
- 检查了涉及VGLL3,KLHL15,CtIP,MDC1,TRIP12和USP7.7的蛋白质与蛋白质相互作用.
主要成果:
- 通过PARylation,VGLL3被招募到DNA损伤部位.
- 减少VGLL3减少了RNF8和RAD51在损伤部位的积累,损害了同源重组.
- VGLL3稳定了MDC1并防止了CtIP的降解,从而促进了RNF8的信号传输.
- 减少VGLL3会延缓瘤的生长,并增加异种移植中对乙托胺的敏感性.
结论:
- 在DNA损伤反应中,VGLL3起着新的非转录性作用.
- VGLL3对于高效的同源重组修复至关重要.
- 在DDR中VGLL3的功能与其已知的转录辅因子活性不同,并且在VGLL家族成员中没有保留.
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