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Selection between Competing Self-Reproducing Lipids: Succession and Dynamic Activation
JACS Au ( IF 8.5 ) Pub Date : 2021-08-16 , DOI: 10.1021/jacsau.1c00138
Michael G Howlett 1 , Robert J H Scanes 1 , Stephen P Fletcher 1
Affiliation  

Models of chemical evolution are central to advancing origins of life research. To design more lifelike systems, we must expand our understanding of molecular selection mechanisms. Here, we show two selection modes that produce evolving populations of self-reproducing species, formed through thiol–disulfide exchange. Competition between thiol precursors can give clear succession patterns based on steric factors, an intrinsic property. A separate, emergent selection mechanism—dynamic activating metathesis—was found when exploring competing disulfide precursors. These experiments reveal that additional species generated in the mixture open up alternative reaction pathways to form self-reproducing products. Thus, increased compositional complexity provides certain species with a unique competitive advantage at the expense of others.

中文翻译:


竞争性自我复制脂质之间的选择:继承和动态激活



化学进化模型对于推进生命起源研究至关重要。为了设计更逼真的系统,我们必须扩大对分子选择机制的理解。在这里,我们展示了两种选择模式,它们产生通过硫醇-二硫化物交换形成的不断进化的自我繁殖物种群体。硫醇前体之间的竞争可以基于空间因素(一种内在特性)给出清晰的演替模式。在探索竞争性二硫键前体时,发现了一种独立的、新兴的选择机制——动态激活复分解。这些实验表明,混合物中产生的其他物质开辟了替代反应途径,以形成自我复制的产物。因此,成分复杂性的增加为某些物种提供了独特的竞争优势,但牺牲了其他物种的利益。
更新日期:2021-09-27
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