Expanded toolbox for directing the biosynthesis of macrocyclic peptides in bacterial cells.

ABSTRACT: The macrocyclization of recombinant polypeptides by means of genetically encodable non-canonical amino acids has recently provided an attractive strategy for the screening and discovery of macrocyclic peptide inhibitors of protein-protein interactions. Here, we report the development of an expanded suite of electrophilic unnatural amino acids (eUAAs) useful for directing the biosynthesis of genetically encoded thioether-bridged macrocyclic peptides in bacterial cells (E. coli). These reagents are shown to provide efficient access to a broad range of macrocyclic peptide scaffolds spanning from 2 to 20 amino acid residues, with the different eUAAs offering complementary reactivity profiles toward mediating short- vs. long-range macrocyclizations. Swapping of the eUAA cyclizatio

SUBMITTER: Iannuzzelli JA 

PROVIDER: S-EPMC7480269 | biostudies-literature | 2020 Jun

REPOSITORIES: biostudies-literature