索罗林锁定了凝聚力的DNA出口门,以保持姐妹染色体凝聚力的凝聚力
Qinfu Chen1, Xueying Yuan1,2,3, Miao Shi3
1Department of Gynecologic Oncology, Women's Hospital, School of Medicine, Zhejiang University, Hangzhou, China.
Nature communications
|March 11, 2026
概括
索罗林作为双重调节剂,直接锁定凝聚蛋白复合体的DNA退出门,并对抗Wapl-Pds5,以在细胞分裂过程中保持姐妹染色体凝聚力.
科学领域:
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
背景情况:
- 凝聚蛋白复合体对于姐妹染色体凝聚力至关重要,涉及SMC1-SMC3-RAD21环.
- 除了对抗Pds5-Wapl之外,索罗林在维护凝聚力的作用尚未完全理解.
研究的目的:
- 阐明索罗林保留凝聚力介导的姐妹染色体凝聚力的机制.
- 调查索罗林与凝聚体复合物的直接相互作用及其调节.
主要方法:
- 生物化学复制试验. 生物化学复制试验.
- 在AlphaFold3指导下进行结构建模.
- 有针对性的突变发生研究.
- 在体内对凝聚素复合体动态的分析.
主要成果:
- 索罗林的C终端区域 (CTR) 通过启动RAD21-SMC3接口,直接锁定凝聚性DNA出口门.
- 中心层绑定索罗林-CTR恢复凝聚力;构成性绑定导致Wapl-loss表型.
- 索罗林-CTR与RAD21-SMC3门之间的保持联系对于凝聚力至关重要.
- 索罗林的线性酸化调节了Pds5的结合,而不是门的结合.
结论:
- 索罗林作为双重调节剂,通过锁定凝聚体出口门,稳定姐妹染色体凝聚力,并对抗Wapl-Pds5.
- 这种双重功能允许在线粒分裂过程中及时溶解凝聚力.
- 这些发现重新定义了索罗林在维持基因组稳定性方面的作用机制.
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