酵母果基因酶β子单元具有RNA解活性,并调节细胞循环进展
Waleed S Albihlal1, Ana M Matia-González1,2, Tobias Schmidt3
1School of Biosciences, Faculty of Health and Medical Sciences, University of Surrey, Guildford GU2 7XH, United Kingdom.
Nucleic acids research
|March 12, 2026
概括
酵母果酸酶 (PFK) 的子单元Pfk1p和Pfk2p与信使RNA结合. Pfk2p亚单元作为细胞周期基因的转化激活剂,将新陈代谢与细胞增殖联系起来.
科学领域:
- 生物化学 生化学
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
背景情况:
- 酸果酸酶 (PFK) 是一个关键的糖解酶.
- PFK子单元具有未表征的RNA结合活性.
研究的目的:
- 为了研究酵母PFK子单元的RNA结合能力.
- 阐明PFK在细胞循环调节中的RNA结合活性的功能影响.
主要方法:
- 传递 RNA (mRNA) 免疫沉降测定.
- 对RNA动机进行分析.
- 在体外RNA解试验.
- 核糖体关联研究.
- 对酵母突变表型 (细胞大小,细胞周期进展) 的分析.
主要成果:
- 酵母PFK子单元 (Pfk1p和Pfk2p) 结合了数百种功能相关的mRNA,包括那些参与线粒细胞周期控制的mRNA.
- 这两个子单元在它们的mRNA目标上都能识别GA,UC,AU和U丰富的基因.
- 与Pfk1p不同的是,Pfk2p表现出5'-3'双链RNA解活性.
- Pfk2p与核糖体结合并增强细胞周期基因的转化.
- 缺少Pfk2p (pfk2∆) 的突变体显示细胞大小增加和G1/S相过渡延迟,独立于糖溶性功能.
结论:
- 酵母PFK Pfk2亚单元作为线粒细胞循环转录的转化激活剂.
- 这种激活可能是由能源依赖的RNA解活动介导的.
- 这些发现揭示了中央能量代谢和细胞增殖控制之间的新联系.
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