title: One-electron reductive template-directed ligation of oligodeoxynucleotides possessing a disulfide bond.
abstract: Hypoxic X-radiolysis of diluted aqueous solutions was performed to generate hydrated electrons that induced one-electron reduction of oligodeoxynucleotides (ODNs) possessing a disulfide bond. Upon hypoxic irradiation of dinucleotides, two forms of dinucleotides were produced via intermolecular exchange of the disulfides and ligation that proceeded with a multiple turnover. In contrast to the efficient reaction induced by hypoxic irradiation, the reaction efficiency was dramatically decreased when irradiation was performed under aerobic conditions, presumably due to capturing reactive hydrated electrons by molecular oxygen. We subsequently applied these unique reaction characteristics to template-directed ligation. In the presence of a complementary template ODN, two ODNs possessing a disulfide bond produced a prescribed ODN with high regioselectivity via interstrand crossing upon hypoxic irradiation.
authors.affiliation: Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Katsura Campus, Kyoto 615-8510, Japan. tanabeka@scl.kyoto-u.ac.jp
authors.forename: Kazuhito
authors.initials: K
authors.lastname: Tanabe
authors.forename: Emi
authors.initials: E
authors.lastname: Kuraseko
authors.forename: Yoshimi
authors.initials: Y
authors.lastname: Yamamoto
authors.forename: Sei-ichi
authors.initials: S
authors.lastname: Nishimoto
mesh_terms: D001483:Base Sequence; D004220:Disulfides / Q000138:chemical synthesis / Q000737:chemistry*; D009841:Oligonucleotides / Q000138:chemical synthesis / Q000737:chemistry*; D010084:Oxidation-Reduction
chemical_list: D004220:Disulfides; D009841:Oligonucleotides