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- W2890191449 abstract "Human cells express the UDG superfamily of glycosylases, which excise uracil (U) from the genome. The three members of this structural superfamily are uracil DNA glycosylase (UNG/UDG), single-strand selective monofunctional uracil DNA glycosylase (SMUG1), and thymine DNA glycosylase (TDG). We previously reported that UDG is efficient at removing U from DNA packaged into nucleosome core particles (NCP) and is minimally affected by the histone proteins when acting on an outward-facing U in the dyad region. In an effort to determine whether this high activity is a general property of the UDG superfamily of glycosylases, we compare the activity of UDG, SMUG1, and TDG on a U:G wobble base pair using NCP assembled from Xenopus laevis histones and the Widom 601 positioning sequence. We found that while UDG is highly active, SMUG1 is severely inhibited on NCP and this inhibition is independent of sequence context. Here we also provide the first report of TDG activity on an NCP, and found that TDG has an intermediate level of activity in excision of U and is severely inhibited in its excision of T. These results are discussed in the context of cellular roles for each of these enzymes." @default.
- W2890191449 created "2018-09-27" @default.
- W2890191449 creator A5073012194 @default.
- W2890191449 creator A5088549451 @default.
- W2890191449 creator A5089314180 @default.
- W2890191449 creator A5090725821 @default.
- W2890191449 date "2018-12-01" @default.
- W2890191449 modified "2023-10-15" @default.
- W2890191449 title "Nucleosomes and the three glycosylases: High, medium, and low levels of excision by the uracil DNA glycosylase superfamily" @default.
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- W2890191449 doi "https://doi.org/10.1016/j.dnarep.2018.09.008" @default.
- W2890191449 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6420825" @default.
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