title: Optimized Fmoc solid-phase synthesis of the cysteine-rich peptide linaclotide.
abstract: Linaclotide, a small 14-mer peptide highly rich in cysteines, is currently in phase III clinical trials for the treatment of gastrointestinal disorders. The challenge in the assembly of linaclotide consists of achieving the correct and clean folding of its three disulfide bridges. For this purpose, a number of regioselective, semiregioselective, and random strategies have been studied. In addition to selecting distinct protecting groups for the thiol function, their position in the sequence, the influence of the neighboring protecting groups, as well as the order in which the disulfides fold were studied. Here we describe an optimized solid-phase synthesis of linaclotide that should allow the production of this peptide in multigram amounts.
authors.affiliation: Institute for Research in Biomedicine, Barcelona Science Park, Baldiri Reixac 10, 08028 Barcelona, Spain.
authors.forename: Miriam
authors.initials: M
authors.lastname: Góngora-Benítez
authors.forename: Judit
authors.initials: J
authors.lastname: Tulla-Puche
authors.forename: Marta
authors.initials: M
authors.lastname: Paradís-Bas
authors.forename: Oleg
authors.initials: O
authors.lastname: Werbitzky
authors.forename: Matthieu
authors.initials: M
authors.lastname: Giraud
authors.forename: Fernando
authors.initials: F
authors.lastname: Albericio
mesh_terms: D000595:Amino Acid Sequence; D002851:Chromatography, High Pressure Liquid; D003545:Cysteine / Q000737:chemistry*; D004220:Disulfides / Q000737:chemistry; D005449:Fluorenes / Q000737:chemistry*; D010084:Oxidation-Reduction; D010455:Peptides / Q000138:chemical synthesis* / Q000737:chemistry; D021241:Spectrometry, Mass, Electrospray Ionization; D013237:Stereoisomerism
chemical_list: C496789:9-fluorenylmethoxycarbonyl; D004220:Disulfides; D005449:Fluorenes; D010455:Peptides; D003545:Cysteine; C523483:linaclotide