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温度驱动的催化开关能够使同生物中自催化 ribozymes 的序列依赖放大

Nayan Chakraborty¹, Sandeep Ameta², Shashi Thutupalli^1,3

¹Simons Centre for the Study of Living Machines, National Centre for Biological Sciences (TIFR), Bangalore, 560065, India.

Small (Weinheim an der Bergstrasse, Germany)

|November 19, 2025

概括

温度波动可以控制共聚生物滴中的自我繁殖RNA网络. 这项研究表明,环境变化如何驱动特定RNA变异的选择,为早期生命进化提供了洞察力.

科学领域:

生命起源研究研究生命的起源.
生物化学生物化学
系统化学系统化学

背景情况:

聚合体滴中的自催化RNA网络是最小的自我繁殖系统.
它们在波动条件下的行为并未得到充分理解.
了解这些动态对于生命起源研究至关重要.

研究的目的:

在热扰动下研究Azoarcus ribozyme在同类动物中的自我组装动态.
确定温度对RNA催化和网络组装的影响.
探索序列特定的温度依赖性和选择性放大.

主要方法:

使用精氨酸多烯酸合体来封装Azoarcus ribozyme.
受到控制的热扰动的协生物.
分析了 ribozyme 催化,扩散有限运输和反应动力学.
研究了序列特定的温度值和温度循环的影响.

主要成果:

温度作为酶催化剂的开关,具有自催化RNA组装的特定值.
由于扩散限制,反应动态在值以下被停止.
切换动力学和温度值是不同的 ribozyme 变体的序列特异.
滴体内部的反应速率偏离了阿雷尼乌斯的行为,表明复杂的催化-分隔合.
温度循环导致 ribozyme 变体的差异放大,使选择性组装成为可能.

结论:

波动的环境可以在分隔的自催化系统中偏向再生动力学.
温度循环可以驱动选择性放大和原始功能差异的出现.
这些发现为原细胞模型中的早期自然选择提供了潜在的机制.

关键词:

自催化剂的自催化作用协类动物协类 ribozymes ribozymes ribozymes 是一种类型的有机化合物.选择的选择选择的选择.

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