title: Synthesis and hybridization of dodecadeoxyribonucleotides containing a fluorescent pyridopyrimidine deoxynucleoside.
abstract: Partially self-complementary dodecadeoxyribonucleotides containing a fluorescent nucleoside, 3-beta-D-2'-deoxyribofuranosyl-2, 7-dioxopyrido[2, 3-d]pyrimidine (pyridopyrimidine deoxynucleoside, dF) were synthesized by the phosphotriester solidphase method. A dodecanucleotide d(GGGAAFGTTCCC) pairing the analog and guanine at the centre of the chain showed a higher melting temperature than the corresponding G-C paired duplex. A similar comparison between A-T and A-F suggested that weaker hydrogen bonds exist when adenine and pyridopyrimidine residues are paired.
mesh_terms: D002942:Circular Dichroism; D006358:Hot Temperature; D006860:Hydrogen Bonding; D009690:Nucleic Acid Conformation; D009838:Oligodeoxyribonucleotides / Q000138:chemical synthesis; D011741:Pyrimidine Nucleosides / Q000138:chemical synthesis; D013050:Spectrometry, Fluorescence; D013056:Spectrophotometry, Ultraviolet; D013329:Structure-Activity Relationship
chemical_list: D009838:Oligodeoxyribonucleotides; D011741:Pyrimidine Nucleosides