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Updated: Jan 18, 2026

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RNA聚合酶II转录延长因子的进化保护和创新

Alex M Francette, Aakash Grover, Nathan Clark

bioRxiv : the preprint server for biology

|January 16, 2026

概括

转录延长因子 (TEF) 是古老的,并且在真核生物中保存,自最后一个共同祖先以来就存在. 然而,在早期分离的细胞群中,域组成有所不同,这揭示了对TEF功能的进化见解.

科学领域:

分子生物学分子生物学
进化生物学进化生物学
遗传学遗传学是一个

背景情况:

转录延长因子 (TEF) 对于真核生物的基因表达至关重要,与RNA聚合酶II (RNAPII) 相结合.
TEFs将转录与关键的共同转录过程联系起来,例如染色体调节和RNA处理.
了解TEF演变,可以了解基因调节的基本机制.

研究的目的:

在生命树上对十个关键的TEF正义词进行全面的,以域为中心的进化分析.
调查TEFs的进化模式和结构上下文.
识别保存和类特定的TEF域,并推断其功能意义.

主要方法:

开发一个以域为中心的分析管道,用于测量TEF的ortologs.
跨多种真核生物种群的TEF序列的比较系遗传学分析.
进化速率的协变分析,以确定功能相关的区域.

主要成果:

所有十个调查的TEF (Paf1,Ctr9,Cdc73,Rtf1,Leo1,Spt4,Spt5,Spt6,Spn1,Elf1) 都存在于最后一个真核生物共同祖先中.
证据表明,在元动物和真菌中保留了TEF域,在元动物中确定了一些类别特定的域.
在一些早期分离的真核细胞群中观察到改变了TEF域组成.

结论:

经TEF介导的转录调节是古老的,并在整个真核生物进化过程中得到保护.
TEFs的域组合已经动态演变,早期分离的谱系有所变化.
这项研究揭示了缺乏特征的TEF领域,为未来的功能解剖铺平了道路.

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