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在Trypanosoma brucei中,DRBD18作为一个转录特异性的RNA编辑辅助因子

Parul Pandey¹, Katherine Wackowski¹, Ashutosh P Dubey¹

¹Department of Microbiology and Immunology, University at Buffalo Jacobs School of Medicine and Biomedical Sciences, Buffalo, New York 14203, USA.

RNA (New York, N.Y.)

|December 10, 2024

概括

一种RNA结合蛋白DRBD18通过与RESC因子相互作用,直接影响Trypanosoma brucei中的线粒体RNA编辑. 它的低甲基化形式对于编辑A6和COIIImRNA至关重要.

科学领域:

线粒体基因表达的表达
转录后的修改是转录后的修改.
动态塑生物学的生物学

背景情况:

尿液插入/删除 (U-indel) RNA编辑对于生成kinetoplastids中成熟的线粒体mRNA至关重要.
辅助RNA结合蛋白 (RBPs) 在调节这种RNA编辑过程中起到转录特异性的作用.
已知RBP的DRBD18因其在线粒体RNA编辑中的潜在作用而被调查,这是由于观察到与RESC因子的相互作用.

研究的目的:

研究DRBD18在*Trypanosoma brucei*中线粒体U-indelRNA编辑中的作用.
为了确定DRBD18是否与RNA编辑核心复合体 (RESC) 因素直接相互作用.
为了阐明DRBD18的氨酸甲基化状态对其线粒体功能的影响.

主要方法:

在前循环T. brucei*中DRBD18枯竭和过度表达的RNA干扰 (RNAi).
定量逆转录PCR (qRT-PCR) 用于测量编辑的转录水平.
接下来是qRT-PCR,以评估直接的RNA结合.

主要成果:

DRBD18与多个RESC因子进行特定和敏感的相互作用.
DRBD18的耗尽显著降低了编辑的A6和COIIImRNA水平,而过度表达则增加了它们.
DRBD18直接参与A6和COIIImRNA的编辑,其低甲基化形式至关重要.

结论:

DRBD18是一种新型的辅助因子,直接参与*T. brucei*中特定mRNA (A6,COIII) 的线粒体RNA编辑.
在RNA编辑中DRBD18的功能是由其氨酸甲基化状态调节的.
这项研究报告了DRBD18.18的第一个线粒体功能.

关键词:

编辑RNA的RNA编辑这是一种RNA结合蛋白.在Trypanosome的研究中,我们发现了三子体.氨酸甲基化的阿尔金因.后翻译修改后的修改.

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