title: [DNA-like duplexes containing repetitive sequences. VII. Chemico-enzymatic synthesis of polymers with fragments of natural promotors].
abstract: Two types of DNA-duplexes containing the repeating fragments of natural promoters have been obtained starting from synthetic oligodeoxyribonucleotides TGCATTATAA, AACTAGTT, AGTTAACT. Deca- and octanucleotides have been synthesized by solid phase method with stepwise or blockwise chain elongation. UV- and CD-spectroscopy has been used to study the physico-chemical properties of the synthetic oligonucleotides. Polycondensation of oligonucleotides induced by water-soluble carbodiimide (chemical ligation) or T4-polynucleotide ligase allowed to synthesize the promoter models. The degree of polymerization varied from 2 to 8 in case of chemical ligation and from 2 to 30 in case of enzymatic ligation. A new chain length regulation technique has been developed by means of addition of a terminator of polycondensation (unphosphorylated oligonucleotide) in the reaction mixture.
mesh_terms: D001483:Base Sequence; D004247:DNA / Q000032:analysis* / Q000138:chemical synthesis; D011088:DNA Ligases; D004591:Electrophoresis, Polyacrylamide Gel; D009838:Oligodeoxyribonucleotides / Q000032:analysis* / Q000138:chemical synthesis; D009841:Oligonucleotides / Q000032:analysis*; D009876:Operon; D012091:Repetitive Sequences, Nucleic Acid; D013698:Templates, Genetic; D014783:Viscosity
chemical_list: D009838:Oligodeoxyribonucleotides; D009841:Oligonucleotides; D004247:DNA; D011088:DNA Ligases
vernacular_title: DNK-podobnye dupleksy, soderzhashchie povtory. VII. Khimiko-fermentativnyĭ sintez polimerov s fragmentami prirodnykh promotorov.