通过真核转移DNA聚合酶绕过甲索亚胺诱导的基础部位
Anna V Yudkina1,2, Anna A Novikova3, Anastasia D Stolyarenko3
1Siberian Branch of the Russian Academy of Sciences Institute of Chemical Biology and Fundamental Medicine, 8 Lavrentieva Ave., 630090 Novosibirsk, Russia.
International journal of molecular sciences
|January 25, 2025
概括
甲氧胺 (MOX) 产生阻断修复的DNA附加物. DNA聚合酶Rev1有效地绕过这些MOX-附加物,表明其在细胞对这种损伤的反应中的作用.
科学领域:
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
- 生物化学 生化学
背景情况:
- 阿普里尼克/阿普里米尼克 (AP) 位点是基切除修复 (BER) 修复的突变性DNA病变.
- 甲氧胺 (MOX) 通过形成AP-MOX添加物来抑制BER,这些添加物对AP内核酶具有抗性.
- 转载DNA合成是预期的细胞对未经修复的AP-MOX的反应,但其突变性是未知的.
研究的目的:
- 为了比较AP-MOX和自然AP站点的阻断和变异性特性.
- 研究真核DNA聚合酶 (η, ι, ζ, Rev1, PrimPol) 在这些病变中转化合成中的作用.
主要方法:
- 在体外测试测量DNA聚合酶绕过效率和错误编码.
- 通过多个真核细胞DNA聚合酶进行病变处理的比较.
主要成果:
- AP-MOX和AP位点的错误编码潜力在酶之间是相似的.
- AP-MOX的阻断效率是DNA聚合酶特有的.
- 对于两种病变,Pol η和PrimPol显示出类似的绕道效率.
- AP-MOX的政治绕道比AP站点低15倍.
- Rev1的绕过AP-MOX的效率是AP站点的5倍.
结论:
- 与自然的AP位相比,Rev1显示了AP-MOX的优越绕过.
- Rev1很可能是人类细胞中通过AP-MOX进行转化合成的主要酶.
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