Ribosome-Free Translation up to Pentapeptides via Template Walk on RNA Sequences.
Angew Chem Int Ed Engl
; : e202410317, 2024 Jul 05.
Article
em En
| MEDLINE
| ID: mdl-38967604
ABSTRACT
The origin of translation is one of the most difficult problems of molecular evolution. Identifying molecular systems that translate an RNA sequence into a peptide sequence in the absence of ribosomes and enzymes is a challenge. Recently, single-nucleotide translation via coupling of 5' phosphoramidate-linked amino acids to 2'/3'-aminoacyl transfer-NMPs, as directed by the sequence of an RNA template, was demonstrated for three of the four canonical nucleotides. How single-nucleotide translation could be expanded to include all four bases and to produce longer peptides without translocation along the template strand remained unclear. Using transfer strands of increasing length containing any of the four bases that interrogate adjacent positions along the template, we now show that pentapeptides can be produced in coupling reactions and subsequent hydrolytic release in situ. With 2'/3'-aminoacylated mono-, di-, tri- and tetranucleotides we thus show how efficient translation can be without biomacromolecules.
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01-internacional
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MEDLINE
Idioma:
En
Revista:
Angew Chem Int Ed Engl
Ano de publicação:
2024
Tipo de documento:
Article