The Application of Isoacyl Structural Motifs in Prodrug Design and Peptide Chemistry

Isobactins: O-acyl isopeptide prodrugs of teixobactin and teixobactin derivatives

O-Acyl isopeptide prodrug analogues of the antibiotic teixobactin are stable and non-gelating at acidic pH but convert to the corresponding active teixobactin analogues at neutral pH, thus overcoming limitations in intravenous dosing of teixobactin.

Selective Lysine Modification Enabled by Intramolecular Acyl Transfer

The chemistries selectively modifying recombinant proteins are valuable for the discovery and development of biologic therapeutics. We report here a Lys modification strategy that engages a Cys residue to covalently tether the reagents to the target that facilitates a proximity-driven intramolecular O-to-N acyl-transfer process yielding desired Lys-acylated products. We utilized GLP-1 as a case study, followed by desulfurization of the Cys mutation to native Ala regenerating the native sequence in a traceless fashion.