title: General chemoselective and redox-responsive ligation and release strategy.
abstract: We report a switchable redox click and cleave reaction strategy for conjugating and releasing a range of molecules on demand. This chemoselective redox-responsive ligation (CRRL) and release strategy is based on a redox switchable oxime linkage that is controlled by mild chemical or electrochemical redox signals and can be performed at physiological conditions without the use of a catalyst. Both conjugation and release reactions are kinetically well behaved and quantitative. The CRRL strategy is synthetically modular and easily monitored and characterized by routine analytical techniques. We demonstrate how the CRRL strategy can be used for the dynamic generation of cyclic peptides and the ligation of two different peptides that are stable but can be selectively cleaved upon changes in the redox environment. We also demonstrate a new redox based delivery of cargoes to live cells strategy via the CRRL methodology by synthesizing a FRET redox-responsive probe that is selectively activated within a cellular environment. We believe the ease of the CRRL strategy should find wide use in a range of applications in biology, tissue engineering, nanoscience, synthetic chemistry, and material science and will expand the suite of current conjugation and release strategies.
authors.affiliation: Department of Chemistry, University of North Carolina at Chapel Hill , Chapel Hill, North Carolina 27599, United States.
authors.forename: Sungjin
authors.initials: S
authors.lastname: Park
authors.forename: Nathan P
authors.initials: NP
authors.lastname: Westcott
authors.forename: Wei
authors.initials: W
authors.lastname: Luo
authors.forename: Debjit
authors.initials: D
authors.lastname: Dutta
authors.forename: Muhammad N
authors.initials: MN
authors.lastname: Yousaf
mesh_terms: D000818:Animals; D002448:Cell Adhesion / Q000187:drug effects; D031541:Fluorescence Resonance Energy Transfer; D051379:Mice; D010084:Oxidation-Reduction; D010456:Peptides, Cyclic / Q000138:chemical synthesis / Q000737:chemistry / Q000378:metabolism*; D041701:Swiss 3T3 Cells
chemical_list: D010456:Peptides, Cyclic