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乙基-乙基异构酶Cyclophilin71促进了SERRATE相分离和miRNA处理在Arabidopsis中
Gaozhan Zhao1,2, Jinrong Niu1,2, Zhuoyan Hai1,2
1Center for Plant Biology, School of Life Sciences, Tsinghua University, Beijing 100084, China.
环林71 (CYP71) 通过促进核体的形成,增强了Arabidopsis中的微RNA (miRNA) 生产. 这涉及与SERRATE (SE) 的直接相互作用及其相分离,对于miRNA处理至关重要.
科学领域:
- 分子生物学分子生物学
- 植物科学 植物科学
- 基因法规 基因法规
背景情况:
- 微RNAs (miRNAs) 是基因表达的关键调节者.
- 在Arabidopsis中,miRNA生物发生依赖于Dicing复合体 (DCL1,SE,HYL1).
- 通过相分离,SE方便将复合组装成核体 (D体).
研究的目的:
- 研究Cyclophilin71 (CYP71) 在miRNA处理中的作用.
- 阐明CYP71影响D体形成和Dicing复合体活动的机制.
主要方法:
- 蛋白相互作用测试以确认CYP71-SE结合.
- 阶段分离试验评估CYP71对SE的影响.
- 分析miRNA水平和D体形成对CYP71活动的反应.
主要成果:
- CYP71直接与SE相互作用,增强其相分离并促进D体的形成.
- CYP71积极调节Dicing复合物的活性,导致miRNA的产生增加.
- CYP71的乙烯基异构酶 (PPIase) 活性对于其在miRNA生物发生中的功能至关重要.
结论:
- CYP71,一个环菲林蛋白,在编排miRNA处理中起着至关重要的作用.
- 由CYP71调解的乙-乙 cis-trans 异体化参与了SE相分离.
- 这项研究揭示了一种新的机制,将蛋白质异构化与植物miRNA生物发生调节联系起来.
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