Abstract
Coacervate microdroplets, a protocell model in exploring the origin of life, have gained significant attention. Clay minerals, catalysts during the origin of life, are crucial in the chemical evolution of small molecules into biopolymers. However, our understanding of the relationship between clay minerals and the formation and evolution of protocells on early Earth remains limited. In this work, the nanoclay montmorillonite nanosheet (MMT-Na) was employed to investigate its interaction with coacervate microdroplets formed by oligolysine (K10) and adenine nucleoside triphosphate (ATP). As an anionic component, MMT-Na was noted to promote the formation of coacervate microdroplets. Furthermore, the efficiency of ssDNA enrichment and the degree of ssDNA hybridization within these microdroplets were significantly improved. By combining inorganic nanoclay with organic biopolymers, our work provides an efficient way to enrich genetic biomolecules in the primitive Earth environment and builds a nanoclay-based coacervate microdroplets, shedding new light on life's origin and protocell evolution.
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