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模拟早期地球条件,助力揭示生命起源,化学家首次实现RNA与氨基酸连接
Ke Ji Ri Bao· 2025-09-02 06:33
Core Insights - Researchers at University College London (UCL) have achieved a significant breakthrough by successfully connecting RNA with amino acids under simulated early Earth conditions, addressing a long-standing question regarding the synthesis of proteins, which are essential for life [1][2] Group 1: Research Findings - The study demonstrates that amino acids, the building blocks of proteins, can chemically link with RNA, which serves as the "instruction manual" for protein synthesis [1] - The reaction was conducted in a neutral aqueous environment, showing spontaneity and selectivity, suggesting that similar processes could have occurred in primordial Earth environments such as ponds or lakes approximately 4 billion years ago [1][2] Group 2: Methodology - The research team utilized a novel approach by introducing thioester as an activated intermediate, which is a high-energy compound that plays a crucial role in various biochemical processes [2] - They employed a sulfur-containing compound, pantetheine, to generate thioesters, further supporting its potential role in the origin of life under early Earth conditions [2] Group 3: Theoretical Implications - The findings bridge two prevailing theories of life's origin: the "RNA world" hypothesis, which posits that self-replicating RNA is fundamental, and the "thioester world" hypothesis, which suggests that thioesters were the primary energy source for early life [2] - This research provides a new unified framework for understanding the origins of life, indicating that the reaction pathways identified could have naturally occurred on early Earth [2]