Nucleosomes and the three glycosylases: High, medium, and low levels of excision by the uracil DNA glycosylase superfamily.
Nucleosomes and the three glycosylases: High, medium, and low levels of excision by the uracil DNA glycosylase superfamily.
复制标题
DOI:
10.1016/j.dnarep.2018.09.008
复制
发表时间:
2018-12
期刊:
影响因子:
3.8
通讯作者:
Delaney S
中科院分区:
文献类型:
--
作者:
Tarantino ME;Dow BJ;Drohat AC;Delaney S
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.
登录
查看更多内容
影响因子:
14.9
作者:
Coey CT;Drohat AC
通讯作者:
Drohat AC
影响因子:
12.3
作者:
通讯作者:
--
影响因子:
14.9
作者:
Da LT;Yu J
通讯作者:
Yu J
DOI:
10.1073/pnas.1803323115
发表时间:
2018-06-05
影响因子:
11.1
作者:
Dodd, Thomas;Yan, Chunli;Ivanov, Ivaylo
通讯作者:
Ivanov, Ivaylo
影响因子:
5.6
作者:
Boland, Michael J.;Christman, Judith K.
通讯作者:
Christman, Judith K.