蒙特莫里隆尼特K10粘土对RNA结构和功能的影响
Ranajay Saha1, Wei-Ling Kao2, Brandon Malady3
1Department of Chemical and Biomolecular Engineering, Department of Chemistry and Biochemistry, University of California, Los Angeles, California; Department of Chemistry and Biochemistry, University of California, Santa Barbara, California.
Biophysical journal
|November 4, 2023
概括
矿物表面可能有助于早期的RNA生命,但这项研究表明,蒙特莫里隆石粘土会破坏RNA折叠和功能. 这挑战了矿物吸收RNA世界的想法.
科学领域:
- 生命起源研究研究生命的起源.
- 益生菌化学 益生菌化学
- RNA生物化学与RNA生物化学
背景情况:
- RNA世界假设表明RNA是早期生命的核心.
- 矿物表面被认为是前生物化学的关键环境,可能有助于RNA聚合和稳定.
- 以前的研究表明矿物质可以支持RNA过程,但模拟表明RNA折叠的干扰.
研究的目的:
- 为了研究合成粘土蒙特莫里隆尼特K10对马拉绿色RNA吸收体的影响.
- 评估矿物质吸附如何影响RNA结合,二次结构形成和整体功能.
- 为了评估矿物质吸收RNA世界的可信性.
主要方法:
- 研究了马拉基特绿色RNA吸收体和模型RNA/DNA寡核酸.
- 使用光光谱学,吸附试验,化曲线,弗斯特共振能量转移 (FRET) 和质子核磁共振 (1H-NMR).
- 检查了粘土与RNA的结合以及马拉绿色染料.
主要成果:
- 蒙莫里隆尼特K10在很大程度上破坏了马拉绿色RNA的整体折叠和结合.
- 虽然一些基配对没有受到影响,但基的结构和功能受到粘土的显著影响.
- 对蒙莫里隆石的吸附影响了模型RNA和DNA寡核酸中的二次结构形成.
结论:
- 矿物表面,如蒙莫里隆石,可能会显著限制吸附RNA分子的结构和功能.
- 这些发现表明,由于结构性破坏,拟议的矿物吸收RNA世界场景可能不那么合理.
- 需要进一步的研究,以了解矿物质和核酸在前生物环境中的复杂相互作用.
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