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酵母细胞中枢细胞作为组织中心,促进Polo激酶介导的适应性,以对持续的DNA损伤进行治疗

Laurence Langlois-Lemay¹, Damien D'Amours¹

¹Ottawa Institute of Systems Biology, Department of Cellular and Molecular Medicine, University of Ottawa, Ottawa, ON K1H 8M5, Canada.

Proceedings of the National Academy of Sciences of the United States of America

|July 2, 2025

概括

波罗样类激酶 (PLKs) 通过招募螺旋杆体 (SPBs) 来帮助细胞适应DNA损伤. SPBs协调这个过程,使细胞能够绕过细胞循环停止并适应DNA损伤.

科学领域:

细胞生物学细胞生物学
分子生物学分子生物学
遗传学遗传学是一个

背景情况:

细胞循环停止和适应DNA损伤是由波罗样酶 (PLKs) 调节的.
适应过程中DNA损伤检查点沉默的机制涉及到Cdc5 PLK向微管组织中心 (MTOC) 的丰富.

研究的目的:

研究螺旋杆体 (SPB) 作为超分子组织中心在协调Cdc5 PLK招募和DNA损伤适应过程中的信号传递中的作用.
确定关键的SPB组件和参与该过程的下游影响因素.

主要方法:

研究了持续DNA损伤的酵母细胞中Cdc5 PLK对SPB的招募.
确定了对Cdc5招募至关重要的SPB组件 (Nud1, Spc110, Spc72).
通过Cdc5.5分析了SPB子单位 (Cnm67,Mps3) 的酸化.
评估了这些酸化事件对细胞周期绕过和适应的要求.

主要成果:

在DNA损伤适应过程中,SPB积极协调Cdc5的招募和信号.
在DNA受损的情况下,Nud1,Spc110和Spc72是Cdc5招募到SPB的关键.
Cdc5酸化了SPB子单元Cnm67和Mps3,这对于绕过细胞循环停止至关重要.
这种适应反应是特定的,而不是由于一般的MTOC失活.

结论:

SPBs的功能是作为超分子组织中心招募和激活PLKs以适应DNA损伤.
中心细胞作为平台协调PLK招募和基质选择在DNA损伤反应 (DDR).

关键词:

Cdc5 在线阅读 PLK1 PLK1 的意思是适应适应适应适应中心体中心体中心体中心体螺旋杆杆体的螺旋杆体是什么

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