Oxidative deselenization of selenocysteine: applications for programmed ligation at serine

Lara R Malins, Nicholas J Mitchell, Sheena McGowan, Richard J Payne

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54 Citations (Scopus)


Despite the unique chemical properties of selenocysteine (Sec), ligation at Sec is an under-utilized methodology for protein synthesis. We describe herein an unprecedented protocol for the conversion of Sec to serine (Ser) in a single, high-yielding step. When coupled with ligation at Sec, this transformation provides a new approach to programmed ligations at Ser residues. This new reaction is compatible with a wide range of functionality, including the presence of unprotected amino acid side chains and appended glycans. The utility of the methodology is demonstrated in the rapid synthesis of complex glycopeptide fragments of the epithelial glycoproteins MUC5AC and MUC4 and through the total synthesis of the structured, cysteine (Cys)-free protein eglin C.
Original languageEnglish
Pages (from-to)12716 - 12721
Number of pages6
JournalAngewandte Chemie - International Edition
Issue number43
Publication statusPublished - 2015

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