Abstract
THE 'RNA world' hypothesis proposes an early stage in the evolution of life in which both genomic and catalytic functions were fulfilled by RNA1. The evolution of RNA-catalysed protein synthesis would have been a necessary step in the transition from such an RNA world to modern protein-dominated biology. For this to have been possible, RNA must be capable of catalysing amide-bond formation using acylated carrier RNA substrates as amino-acid donors. We have used in vitro selection and evolution to isolate ribozymes with acyl transferase activity from a pool of random RNA sequences. One of these acyl transferases with a 5′-amino group transfers an amino acid to itself in a reaction that we propose to be analogous to peptidyl transfer on the ribosome.
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Lohse, P., Szostak, J. Ribozyme-catalysed amino-acid transfer reactions. Nature 381, 442–444 (1996). https://doi.org/10.1038/381442a0
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DOI: https://doi.org/10.1038/381442a0
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