Abstract
The ability to encode and convert heritable information into molecular function is a defining feature of life as we know it. The conversion of information into molecular function is performed by the translation process, in which triplets of nucleotides in a nucleic acid polymer (mRNA) encode specific amino acids in a protein polymer that folds into a three-dimensional structure. The folded protein then performs one or more molecular activities, often as one part of a complex and coordinated physiological network. Prebiotic systems, lacking the ability to explicitly translate information between genotype and phenotype, would have depended upon either chemosynthetic pathways to generate its components—constraining its complexity and evolvability— or on the ambivalence of RNA as both carrier of information and of catalytic functions—a possibility which is still supported by a very limited set of catalytic RNAs. Thus, the emergence of translation during early evolutionary history may have allowed life to unmoor from the setting of its origin. The origin of translation machinery also represents an entirely novel and distinct threshold of behavior for which there is no abiotic counterpart—it could be the only known example of computing that emerged naturally at the chemical level. Here we describe translation machinery’s decoding system as the basis of cellular translation’s information-processing capabilities, and the four operation types that find parallels in computer systems engineering that this biological machinery exhibits.
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Funding was provided by the John Templeton Foundation Grant #61926 and Margarita Salas Fellowship (Recualifica program) of the Universidad Politécnica de Madrid, funded by the NextGenerationEU, European Commission.
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Cuevas-Zuviría, B., Adam, Z.R., Goldman, A.D. et al. Informatic Capabilities of Translation and Its Implications for the Origins of Life. J Mol Evol 91, 567–569 (2023). https://doi.org/10.1007/s00239-023-10125-0
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DOI: https://doi.org/10.1007/s00239-023-10125-0