缺氧使SETDB1稳定,以保持基因组的稳定性.
Sungryul Park1, Jin Hwa Cho1, Jong-Hwan Kim2
1Disease Target Structure Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon 34141, Republic of Korea.
Nucleic acids research
|October 18, 2023
概括
希佩尔-林道 (VHL) 瘤抑制剂针对SETDB1进行降解,这是维持基因组稳定性至关重要的过程. 缺氧导致VHL功能丧失导致SETDB1积累,引发免疫反应和DNA损伤.
科学领域:
- 分子生物学分子生物学
- 癌症生物学 癌症生物学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
背景情况:
- ·希佩尔-林道 (VHL) 蛋白是一种瘤抑制剂,也是CRL2VHL E3泛素结合酶复合物的关键组成部分.
- 虽然VHL在瘤抑制中的作用已经确立,但其基质和机制的全谱仍在研究中.
研究的目的:
- 确定CRL2VHL复合物的新基质,阐明VHL的瘤抑制功能,特别是有关氧气水平的功能.
- 在低氧条件下调查SETDB1积累的功能后果.
主要方法:
- 蛋白质组分析以确定与VHL相互作用的蛋白质.
- 生物化学试验研究由CRL2VHL对SETDB1的依赖氧的调节.
- 在不同氧气条件下,分析转移性元素活性,免疫反应和在SETDB1水平改变的细胞中的DNA损伤.
主要成果:
- 基因组H3K9甲基转移酶SETDB1被确定为CRL2VHL复合物的新基质.
- SETDB1以依赖氧气的方式化,标记为CRL2VHL介导的降解.
- 缺氧导致SETDB1积累,增加可转移元素 (TE) 脱压,增加免疫-炎症反应,以及DNA损伤引起的细胞死亡.
结论:
- 在CRL2VHL E3复合物中介于SETDB1.1的依赖氧的降解.
- 通过抑制可转移元素活性,SETDB1在低氧压力下维持基因组稳定性起着至关重要的作用.
- 通过VHL对SETDB1降解的调节失调有助于低氧下细胞反应,影响基因组完整性和潜在的瘤发生.
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