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Sis2以剂量取决的方式调节酵母复制寿命
Tolga T Ölmez1,2,3,4, David F Moreno1,2,5, Ping Liu1,2
1Department of Molecular Cellular and Developmental Biology, Yale University, 219 Prospect Street, New Haven, CT, 06511, USA.
微流体平台精确测量了307个基因被删除的菌株的酵母复制寿命 (RLS). 许多菌株没有显示延长寿命,SIS2基因删除揭示了剂量依赖的寿命调节.
科学领域:
- * 分子生物学 * 分子生物学
- * 遗传学 在遗传学方面
- * 衰老研究研究
背景情况:
- *微流体平台可以高精度测量酵母复制寿命 (RLS).
- * 在大型菌株库中对RLS的比较量化一直缺乏.
- *以前的研究报告了各种基因被删除的酵母菌株的延长寿命.
研究的目的:
- * 为了对307个单基因被删除酵母菌株进行高精度的RLS比较量化.
- * 确定能够显著改变酵母寿命的基因删除,并验证先前的发现.
- * 调查SIS2基因及其相关途径在寿命调节中的作用.
主要方法:
- *对307种酵母菌株进行RLS的微流体测量,每种菌株都有单个基因缺失.
- *对RLS与野生型菌株进行比较分析.
- *RNA测序 (RNA-seq) 用于分析SIS2删除突变体中的转录变化.
- * 功能分析涉及引入人类PPCDC基因.
主要成果:
- *56%的被测试的基因删除菌株与野生类型相比没有表现出扩展的RLS.
- *44%的菌株显示RLS扩展,但扩展程度往往不同于之前的报告.
- *删除SIS2基因导致RLS最显著的增加,证明了剂量依赖的效果.
- *人类PPCDC基因在sis2Δ背景中中和了寿命延长.
- *RNA-seq揭示了sis2Δ菌株中细胞循环机械组件的转录增加.
结论:
- *高精度的微流体测量对于准确的酵母寿命研究至关重要,揭示了与以前发现的差异.
- *SIS2基因在酵母寿命调节中起着重要作用,可能通过协酶A生物合成途径.
- *细胞循环调节与sis2Δ突变体中观察到的寿命延长有关.
- *进一步阐明控制寿命的基因网络需要精确的测量技术.
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