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布拉斯托克里蒂迪亚不间断的线粒体基因组及其表达显著地与核密码子重新分配隔离在一起

Dmitry A Afonin¹, Evgeny S Gerasimov^1,2, Ingrid Škodová-Sveráková^3,4,5

¹Faculty of Biology, Lomonosov Moscow State University, Moscow 119991, Russia.

Nucleic acids research

|March 7, 2024

概括

胚芽细胞不间断地重新编码核停止编码子,影响其线粒体基因表达. 尽管指导RNA的数量很少,但线粒体的转录被编辑,这揭示了这种独特的trypanosomatid中复杂的RNA编辑机制.

科学领域:

分子生物学分子生物学
遗传学遗传学是一个
寄生虫学的寄生虫学

背景情况:

特里巴诺索马蒂类动物表现出不寻常的遗传密码,其中核停止密码在Blastocrithidia nonstop中重新编码.
试类动物中的线粒体转录需要RNA编辑以实现功能性的开放阅读框架.
RNA编辑由小RNAs指导,创建一个复杂的线粒体转录基因组.

研究的目的:

调查核基因组重编码对B. nonstop中的线粒体基因组和基因表达的影响.
了解核遗传代码改变的背景下线粒体RNA编辑的机制.

主要方法:

核和线粒体基因组的比较分析.
研究RNA编辑过程和指导RNA种群.
对线粒体基因表达和参与编辑的蛋白质因素的分析.

主要成果:

B. nonstop使用典型的trypanosomatid线粒体遗传密码,表明抑制核编码的抑制器tRNAs.
观察到mRNA编辑因子的变化,但可能不是来自核重编码.
导向RNA的最小数量指导广泛的编辑,即使对于缺乏特定导向RNA的密码基因.

结论:

在B.的核重新编码不间断地影响线粒体遗传密码和tRNA进口.
在B. nonstop中进行线粒体RNA编辑是强大而复杂的,使用有限的引导RNA有效地运行.
密码基因的随机编辑发生在高水平上,尽管没有特定的引导RNA,突出显示了新的编辑调节.

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