title: Highly efficient synthesis of peptide-oligonucleotide conjugates: chemoselective oxime and thiazolidine formation.
abstract: A convergent strategy for the synthesis of peptide-oligonucleotide conjugates (POC) is presented. Chemoselective ligation of peptide to oligonucleotide was accomplished by oxime and thiazolidine formation. Oxime conjugation was performed by treating an oxyamine-containing peptide with an aldehyde-containing oligonucleotide or vice versa. Ligation by thiazolidine formation was achieved by coupling a peptide, acylated with a cysteine residue, to an oligonucleotide that was derivatised by an aldehyde function. For both approaches, the conjugates were obtained in good yield without the need for a protection strategy and under mild aqueous conditions. Moreover, the oxime ligation proved useful for directly conjugating duplex oligonucleotides. Combined with molecular biology tools, this methodology opens up new prospects for post-functionalisation of high-molecular-weight DNA structures.
authors.affiliation: LEDSS, UMR CNRS 5616, Université Joseph Fourier, Grenoble, France.
authors.forename: D
authors.initials: D
authors.lastname: Forget
authors.forename: D
authors.initials: D
authors.lastname: Boturyn
authors.forename: E
authors.initials: E
authors.lastname: Defrancq
authors.forename: J
authors.initials: J
authors.lastname: Lhomme
authors.forename: P
authors.initials: P
authors.lastname: Dumy
mesh_terms: D000595:Amino Acid Sequence; D001483:Base Sequence; D009838:Oligodeoxyribonucleotides / Q000138:chemical synthesis / Q000737:chemistry*; D009842:Oligopeptides; D010091:Oximes; D020135:Peptide Nucleic Acids / Q000138:chemical synthesis*; D010455:Peptides / Q000138:chemical synthesis / Q000737:chemistry*; D013844:Thiazoles
chemical_list: D009838:Oligodeoxyribonucleotides; D009842:Oligopeptides; D010091:Oximes; D020135:Peptide Nucleic Acids; D010455:Peptides; D013844:Thiazoles; C047981:arginyl-glycyl-aspartic acid