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- W2024300995 abstract "In order to study the mechanism of action of uracil-DNA glycosylase (UDG) from human placenta, single-stranded (ss) and double-stranded (ds) oligodeoxyribonucleotides (oligos), containing deoxyuridine (dU) and a wide variety of their analogs were used. It was shown that UDG has a twofold preference for ss oligos over ds oligos and a twofold preference for intermolecular duplexes over similar hairpin-like duplexes. The replacement of dU with 1-(beta-D-2'-deoxy-threo-pentofuranosil)uracil (xU) or 1-(beta-D-3'-deoxy-threo-pentofuranosil)uracil (tU), which results in a change in sugar hydroxyl configuration, has no influence on UDG binding to such substrates, but inhibits uracil removal. A oligo containing 2'-deoxy-2'-fluorouridine (flU), with a 3'-endo conformation of modified sugar is recognized by UDG 100-200-fold less efficiently than the natural ones. F or Br atoms or a methyl group were introduced at position 5 of a dU residue in an oligo. It was shown that the nature of a substituent at this position is essential for UDG function." @default.
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- W2024300995 date "1995-05-01" @default.
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- W2024300995 title "Modified substrates as probes for studying uracil-DNA glycosylase" @default.
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- W2024300995 doi "https://doi.org/10.1016/0378-1119(94)00771-j" @default.
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