Volume 127, Issue 43 pp. 12907-12912
Zuschrift

Oxidative Deselenization of Selenocysteine: Applications for Programmed Ligation at Serine

Dr. Lara R. Malins

Dr. Lara R. Malins

School of Chemistry, The University of Sydney, NSW 2006 (Australia) http://sydney.edu.au/science/chemistry/∼payne/index.html

These authors contributed equally to this work.

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Dr. Nicholas J. Mitchell

Dr. Nicholas J. Mitchell

School of Chemistry, The University of Sydney, NSW 2006 (Australia) http://sydney.edu.au/science/chemistry/∼payne/index.html

These authors contributed equally to this work.

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Dr. Sheena McGowan

Dr. Sheena McGowan

Department of Biochemistry and Molecular Biology, Monash University, Melbourne, VIC 3800 (Australia)

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Prof. Richard J. Payne

Corresponding Author

Prof. Richard J. Payne

School of Chemistry, The University of Sydney, NSW 2006 (Australia) http://sydney.edu.au/science/chemistry/∼payne/index.html

School of Chemistry, The University of Sydney, NSW 2006 (Australia) http://sydney.edu.au/science/chemistry/∼payne/index.htmlSearch for more papers by this author
First published: 01 September 2015
Citations: 36

Abstract

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.

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