The prebiotic emergence of biological evolution
arxiv(2023)
摘要
The origin of life must have been preceded by Darwin-like evolutionary
dynamics that could propagate it. How did that adaptive dynamics arise? And
from what prebiotic molecules? Using evolutionary invasion analysis, we develop
a universal framework for describing any origin story for evolutionary
dynamics. We find that cooperative autocatalysts, i.e. autocatalysts whose
per-unit reproductive rate grows as their population increases, have the
special property of being able to cross a barrier that separates their initial
degradation-dominated state from a growth-dominated state with evolutionary
dynamics. For some model parameters, this leap to persistent propagation is
likely, not rare. We apply this analysis to the Foldcat Mechanism, wherein
peptides fold and help catalyze the elongation of each other. Foldcats are
found to have cooperative autocatalysis and be capable of emergent evolutionary
dynamics.
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