title: [Photoaffinity modification of amino acid derivatives of oligonucleotides in a complementary complex].
abstract: Intracomplex photochemical interaction of photoactive derivatives R-CONH(CH2)3NH-pGATACCAA, where R= p-azidotetrafluorophenyl (I) or 2-nitro-5-azidophenyl (II), and 5'-phospho-p-azidoanilide pGATACCAA (III) with a target - oligonucleotide *pGGTATCp (IV) and its derivatives *pGGTATCp-NH(CH2)3NHX, where X = H (V), Phe (VI), or Lys (VII), was studied. According to electrophoretic data, photoreagent (I) gives rise to a covalent photoadduct with compound (IV) as well as with derivatives (VI) and (VII). In the case of reagent (II), only targets (V) - (VII) including aliphatic amino groups participate in the photocoupling. Upon irradiation of the duplexes comprising photoreagent (III) and targets (V)-(VII), the process is accompanied by the cleavage of the reagent's oligonucleotide moiety off the photomodification product. A plausible mechanism of the cleavage is discussed.
authors.forename: T S
authors.initials: TS
authors.lastname: Godovikova
authors.forename: M V
authors.initials: MV
authors.lastname: Berezovskiĭ
authors.forename: D G
authors.initials: DG
authors.lastname: Knoppe
mesh_terms: D000345:Affinity Labels; D000596:Amino Acids / Q000737:chemistry*; D001386:Azides / Q000737:chemistry*; D004578:Electron Spin Resonance Spectroscopy; D009841:Oligonucleotides / Q000737:chemistry*; D010777:Photochemistry
chemical_list: D000345:Affinity Labels; D000596:Amino Acids; D001386:Azides; D009841:Oligonucleotides
vernacular_title: Fotoaffinnaia modifikatsiia aminokislotnykh proizvodnykh oligonukleotidov v komplementarnom komplekse.