环林B上的酸盐结合口袋控制CDK基质酸化和线粒时间
Henry Y Ng1, Devon H Whelpley1, Armin N Adly1
1Department of Physiology, University of California San Francisco, San Francisco CA.
bioRxiv : the preprint server for biology
|March 11, 2024
概括
新发现的酸盐结合口袋在B型循环素上,类似于Cks1,调节循环素依赖激酶 (CDK) 基质的多位酸化. 这一发现对于理解细胞循环进展的稳定时间至关重要.
科学领域:
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
- 生物化学 生物化学
背景情况:
- 细胞周期进展依赖于循环素依赖激酶 (CDK) 和它们的调节伙伴,循环素和Cks1.
- CDKs通过多站位酸化来调节多种基质,这一过程依赖于Cks1以进行高效的二次站点修饰.
研究的目的:
- 为了研究一种新发现的酸盐结合口袋 (PP) 在B型环林上在调节CDK基质酸化中的作用.
- 为了确定这种与环林相关的PP是否会影响细胞周期时间和基质修饰模式.
主要方法:
- 在Clb2中的酸盐结合口袋的局部定向突变发生,这是芽生长酵母中的关键线粒环林.
- 在突变菌株中分析细胞形态和细胞周期进展 (亚纳相发作).
- 使用野生类型和突变Clb2.2的CDK基质的体外酸化试验.
主要成果:
- Clb2酸盐结合口袋的突变导致了芽形态的改变,并延迟了亚纳相的发生.
- 突变的PP显著降低了CDK基质的多位点酸化,包括阿纳法酶促进复合体/循环体和极极体的组成部分.
- 这些结果表明,环林PP对特定CDK标的高效多站位酸化至关重要.
结论:
- B型环素的酸盐结合口袋在控制CDK基板上的多位酸化模式方面发挥着至关重要的作用.
- 这种循环素介导的调节,类似于Cks1的功能,有助于精确和稳健的关键细胞周期事件的时间.
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