Engineering of a Peptide α-N-Methyltransferase to Methylate Non-Proteinogenic Amino Acids
- Journal Article
Rights / licenseCreative Commons Attribution 4.0 International
Introduction of α-N-methylated non-proteinogenic amino acids into peptides can improve their biological activities, membrane permeability and proteolytic stability. This is commonly achieved, in nature and in the lab, by assembling pre-methylated amino acids. The more appealing route of methylating amide bonds is challenging. Biology has evolved an α-N-automethylating enzyme, OphMA, which acts on the amide bonds of peptides fused to its C-terminus. Due to the ribosomal biosynthesis of its substrate, the activity of this enzyme towards peptides with non-proteinogenic amino acids has not been addressed. An engineered OphMA, intein-mediated protein ligation and solid-phase peptide synthesis have allowed us to demonstrate the methylation of amide bonds in the context of non-natural amides. This approach may have application in the biotechnological production of therapeutic peptides. Show more
Journal / seriesAngewandte Chemie. International Edition
Pages / Article No.
SubjectCyclic peptides; non-proteinogenic amino acids; RiPPs; split intein; a-N-methylation
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