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Synthesis and Protein Engineering Applications of Cyclotides

ABSTRACT

Haiou Qu, Bronwyn J. Smithies, Thomas Durek, David J. Craik

Cyclotides are a group of cysteine-rich peptides derived from plants. Their exceptional stability based on their head-to-tail cyclized backbone and cystine knot, together with their tolerance to sequence modifications, make them promising drug design scaffolds into which novel bioactive sequences may be grafted. These grafting applications are achievable by solid-phase peptide synthesis. This article describes recent developments in the chemical synthesis and enzyme-mediated cyclization of cyclotides.