考古物中tRNA修饰的进化格局:高通量测序的见解
Jesse S Leavitt1, Henry Moore1, Thomas J Santangelo2
1Department of Biomolecular Engineering, Baskin School of Engineering, University of California Santa Cruz, Santa Cruz, CA 95064, USA.
bioRxiv : the preprint server for biology
|July 14, 2025
概括
转移RNA (tRNA) 修改对于细胞功能至关重要. 这项研究揭示了古生物中的协调和类特异性tRNA修饰模式,与进化酶变化有关.
科学领域:
- 分子生物学分子生物学
- 进化生物学 进化生物学
- 基因组学就是基因组学.
背景情况:
- 转移RNA (tRNA) 修改对于蛋白质合成的准确性和效率至关重要.
- 进化轨迹和tRNA修饰的多样性尚未完全理解.
- 高通量测序方法,如有序双模板中继测序 (OTTR-seq),可以实现全基因组tRNA修饰分析.
研究的目的:
- 通过OTTR-seq.使用多种古老物种全面描述tRNA修饰的情况.
- 研究古物中tRNA修饰的进化动态和模式.
- 为了将tRNA修饰与修饰酶的进化变化相关联.
主要方法:
- 订购的两个模板中继测序 (OTTR-seq) 用于转录组范围的tRNA修改检测.
- 对tRNA修饰酶 (例如Trm14,Trm10,Trm11,Trm1) 的比较基因组分析.
- 对tRNA标识元素的分析,包括D-干结构,如G10oU25对.
主要成果:
- 在超热友的古生物中确定了协调和相互排斥的甲基化模式.
- 在Thermoprotei中核心位置发现了类特定的共同修饰,表明对抗决定物的耐受性.
- 在酶域架构中的tRNA修饰和进化分歧之间建立了相关性.
- 提供了进一步的洞察力D-干身份元素,控制酶基质相互作用.
结论:
- 考古tRNA修饰模式表现出显著的进化动态和多样性.
- 在tRNA修饰酶的进化变化与观察到的修饰模式有关.
- 这些发现有助于更好地理解古老的tRNA修饰生物学和进化.
- 这项研究为未来的生化和机理学研究提供了基础.
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