title: Monitoring of duplex and triplex formation by 19F NMR using oligodeoxynucleotides possessing 5-fluorodeoxyuridine unit as 19F signal transmitter.
abstract: We prepared oligodeoxynucleotides (ODNs) possessing a 5-fluorodeoxyuridine (5-FU) unit as a 19F-signal transmitter, and characterized their structures including single strand, duplex, and triplex using 19F NMR. The change in chemical shift induced by incorporation of 5-FU into the ODNs and the formation of higher order structures allowed monitoring of structural changes. Data from UV melting experiments and CD spectra were consistent with the spectral changes in the NMR studies. These 19F-labeled ODNs may be promising molecular probes for the identification of DNA structures in complicated biological conditions.
authors: Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Katsura Campus, Nishikyo-ku, Kyoto 615-8510, Japan. tanabeka@scl.kyoto-u.ac.jp
authors: Kazuhito
authors: K
authors: Tanabe
authors: Masaaki
authors: M
authors: Sugiura
authors: Sei-ichi
authors: S
authors: Nishimoto
mesh_terms: D001483:Base Sequence; D002942:Circular Dichroism; D004247:DNA / Q000737:chemistry*; D005467:Floxuridine / Q000737:chemistry*; D005462:Fluorine Radioisotopes / Q000737:chemistry; D009682:Magnetic Resonance Spectroscopy; D009690:Nucleic Acid Conformation; D009838:Oligodeoxyribonucleotides / Q000737:chemistry*
chemical_list: D005462:Fluorine Radioisotopes; D009838:Oligodeoxyribonucleotides; C051802:triplex DNA; D005467:Floxuridine; D004247:DNA