一个非正规的Puf3p结合序列调节CAT5/COQ7mRNA在发芽酵母的发酵和呼吸条件下
Sachiko Hayashi1, Kazumi Iwamoto2, Tohru Yoshihisa1
1Graduate School of Science, University of Hyogo, Ako-gun, Hyogo, Japan.
PloS one
|December 15, 2023
概括
普米利奥家族蛋白3 (Puf3p) 通过向CAT5 mRNA来调节酵母中的线粒体基因表达. 这项研究揭示了Puf3pp.
科学领域:
- * 分子生物学 * 分子生物学
- * 酵母遗传学 酵母遗传学
- * 转录后的调节.
背景情况:
- *当葡萄糖存在时,Saccharomyces cerevisiae表现出高的葡萄糖代谢,抑制线粒体功能.
- *Pumillio家族蛋白3 (Puf3p) 通过影响mRNA稳定性和翻译,对调节发酵期间的线粒体活性至关重要.
- *Puf3p通常在核编码线粒体 (nc-线粒体) mRNA的3'-未翻译区域 (3'-UTR) 结合保存序列.
研究的目的:
- * 通过Puf3p在不同的生长条件下研究nc-线粒体mRNAs的转录后调节.
- * 探索Puf3p和CAT5/COQ7mRNA之间的相互作用,这是线粒体功能中的关键基因.
- *阐明非正规结合点在Puf3p介导的基因调节中的作用.
主要方法:
- * 西部斑点分析,以评估Cat5p蛋白质水平.
- *体外结合测定以确认Puf3p-CAT5mRNA相互作用.
- *对在CAT5mRNA中具有改变非正规Puf3p结合位的酵母突变的分析.
主要成果:
- * Puf3p通过其3'-UTR.的非正规结合序列直接与CAT5mRNA结合.
- * Puf3p抑制了Cat5p的翻译,并使CAT5mRNA不稳定,无论培养基是什么.
- *CAT5 mRNA被确定为真实的Puf3p标,有额外的调节因素影响通过非正规位点的表达.
结论:
- * Puf3p对Cat5p采用独特的调节机制,涉及mRNA破坏稳定和转化抑制.
- * 这一发现扩大了对酵母Puf3p调节网络的理解.
- * 该研究提供了关于COQ7相关疾病的见解,考虑到酵母Cat5p和人类COQ7.7之间的功能保存.
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