title: Solid-phase synthesis of reduced selenocysteine tetrapeptides and their oxidized analogs containing selenenylsulfide eight-membered rings.
abstract: A series of protected and reduced forms of model tetrapeptides that mimic the C-terminus of human thioredoxin reductases were obtained in good yields, using solid-phase peptide synthesis (SPPS). SPPS was performed on the Knorr Amide MBHA resin for Fmoc chemistry using especially protected cystein and selenocystein derivatives. All amino acids have been coupled according to the HBTU/HOBt/DIPEA method. Furthermore, the corresponding oxidized peptides containing eight-membered rings with intramolecular S-S and S-Se bridges were prepared via I[Formula: see text]/MeOH or DMSO/TFA oxidation, respectively.
authors.affiliation: Leibniz-Institut für Pflanzenbiochemie, Weinberg 3, 06120 , Halle (Saale), Germany. wessjohann@ipb-halle.de
authors.forename: Ludger A
authors.initials: LA
authors.lastname: Wessjohann
authors.forename: Alex
authors.initials: A
authors.lastname: Schneider
authors.forename: Goran N
authors.initials: GN
authors.lastname: Kaluđerović
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Brandt
mesh_terms: D015195:Drug Design; D006801:Humans; D009842:Oligopeptides / Q000138:chemical synthesis* / Q000737:chemistry / Q000378:metabolism; D010084:Oxidation-Reduction; D017279:Selenocysteine / Q000138:chemical synthesis* / Q000737:chemistry; D060327:Solid-Phase Synthesis Techniques; D013440:Sulfides / Q000737:chemistry; D013880:Thioredoxin-Disulfide Reductase / Q000378:metabolism*
chemical_list: D009842:Oligopeptides; D013440:Sulfides; D017279:Selenocysteine; D013880:Thioredoxin-Disulfide Reductase