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线粒体DNA中的基因顺序影响其转录的丰富性 (海洋虫的案例)

Olga V Nikolaeva¹, Anna S Ovcharenko^1,2, Polina V Khorkhordina^1,2

¹Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, 119234, Russia.

Biochemistry. Biokhimiia

|December 7, 2025

概括

线粒体基因顺序在许多动物中得到保存,但其功能仍然不清楚. 这项研究表明,在Thoracostomopsidae线虫中,基因排列,而不是物种进化,影响基因表达,这表明了保存合成的机制.

科学领域:

进化生物学是进化的生物学.
基因组学就是基因组学.
分子生物学分子生物学

背景情况:

大多数动物的线粒体基因组 (mtDNA) 分享了称为syntenies的保存蛋白编码基因 (PCG) 排列.
这些syntenies在进化上是古老的,这表明它们具有功能意义,但根本的机制是未知的.
在线虫中以前没有报告过正规动物合成物,直到最近在Thoracostomopsidae中发现.

研究的目的:

研究海洋线家族Thoracostomopsidae中的线粒体基因组组织和基因表达.
探索线粒体基因顺序和基因表达水平之间的关系.
假设基因排列在线粒体合成体的长期进化保护中的作用.

主要方法:

测序了三种甲状腺类物种的完整线粒体基因组.
确定线粒体基因组中的蛋白质编码基因顺序.
使用可用家族代表的RNA测序数据对相对mRNA水平的分析.

主要成果:

在六种Thoracostomopsidae物种中,发现了三种不同的蛋白质编码基因排列模式.
相对的mRNA水平与基因顺序相关,独立于物种类型.
这表明基因排列会影响线粒体基因组内的基因表达.

结论:

线粒体基因序列在Thoracostomopsidae的基因表达调节中发挥着重要作用.
基因序列和表达之间的相关性为线粒体合成基因的进化保存提供了一个潜在的机制.
这一发现为动物线粒体基因组中的基因排列的功能意义提供了洞察力.

关键词:

埃诺普利亚 (Enoplia) 是一种在RNA-seqqq.这就是Thoracostomopsidae.基因组测序是指对基因组进行测序.基基因组是如何形成的分子进化分子演变.我们的mtDNA mtDNA 线虫线虫在线虫线虫线虫人类的基因组学.转录组 (transcriptome) 是一个转录组.

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