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Genetic Encoding of Cyanopyridylalanine for In-Cell Protein Macrocyclization by the Nitrile-Aminothiol Click Reaction.

ABSTRACT: Cyanopyridylalanines are non-canonical amino acids that react with aminothiol compounds under physiological conditions in a biocompatible manner without requiring added catalyst. Here we present newly developed aminoacyl-tRNA synthetases for genetic encoding of meta- and para-cyanopyridylalanine to enable the site-specific attachment of a wide range of different functionalities. The outstanding utility of the cyanopyridine moiety is demonstrated by examples of i) post-translational functionalization of proteins, ii) in-cell macrocyclization of peptides and proteins, and iii) protein stapling. The biocompatible nature of the protein ligation chemistry enabled by the cyanopyridylalanine amino acid opens a new path to specific in vivo protein modifications in complex biological environments.

SUBMITTER: Abdelkader EH

PROVIDER: S-EPMC9304162 | biostudies-literature |

REPOSITORIES: biostudies-literature

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