马德2B与Cdc20,Cdc27,Rev3和Rev1形成一个复合体,以应对西斯诱导的DNA损伤
Ju Hwan Kim1, Rajnikant Patel2
1Department of Pharmacology, College of Medicine, Dankook University, Cheonan 31116, Korea.
概括
甲基关闭缺陷2像2 (Mad2L2) 蛋白在DNA损伤反应过程中加快了阿纳促进复合物/循环体 (APC/C) 的激活. 这种Mad2L2-APC/C-Cdc20复合体有助于DNA损伤反应蛋白的无处不在.
科学领域:
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
- 癌症研究 癌症研究
背景情况:
- 线粒体逮捕缺陷2像2 (Mad2L2),也称为Mad2B,是DNA聚合酶 ζ.的调节子单元.
- Mad2L2与线粒检查点蛋白 Mad2 具有同质性,此前曾涉及西斯胺诱导的DNA损伤反应.
- 在未受损的细胞中,Mad2L2与Polζ-Rev1和APC/C子单元Cdc27.2形成复合体.
研究的目的:
- 为了研究Mad2L2在DNA损伤反应途径中的作用.
- 为了阐明Mad2L2与DNA损伤后的亚纳促进复合体/循环体 (APC/C) 的相互作用.
- 为了确定Mad2L2-APC/C相互作用在DNA修复中的功能后果.
主要方法:
- 招募测试以确定DNA损伤部位的Mad2L2定位.
- 复杂的形成分析包括Mad2L2,Polζ-Rev1,Cdc27和Cdc20.
- 在体外无化测试以评估APC/C活性.
主要成果:
- 在西斯治疗后,Mad2L2被招募到人类癌细胞中的DNA损伤部位.
- 西斯普拉丁治疗增加了Mad2L2和Cdc20的招募到Mad2L2-Polζ-Rev1-Cdc27复合体中.
- 在实验室中证实了Mad2L2依赖APC/C的激活,这表明Mad2L2在DNA损伤期间加速了APC/C的激活.
结论:
- 通过促进APC/C激活,Mad2L2在DNA损伤反应中发挥着新的作用.
- Mad2L2-APC/C-Cdc20复合体参与了对DNA损伤反应至关重要的蛋白质的无处不在.
- Mad2L2作为APC/C激活的加速器,突出了DNA修复中的新机制.
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