Protease activity of PprI facilitates DNA damage response: Mn2+-dependence and substrate sequence-specificity of the proteolytic reaction.
Protease activity of PprI facilitates DNA damage response: Mn2+-dependence and substrate sequence-specificity of the proteolytic reaction.
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DOI:
10.1371/journal.pone.0122071
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发表时间:
2015
期刊:
影响因子:
3.7
通讯作者:
Hua Y
中科院分区:
文献类型:
--
作者:
Wang Y;Xu Q;Lu H;Lin L;Wang L;Xu H;Cui X;Zhang H;Li T;Hua Y
The extremophilic bacterium Deinococcus radiodurans exhibits an extraordinary resistance to ionizing radiation. Previous studies established that a protein named PprI, which exists only in the Deinococcus-Thermus family, acts as a general switch to orchestrate the expression of a number of DNA damage response (DDR) proteins involved in cellular radio-resistance. Here we show that the regulatory mechanism of PprI depends on its Mn(2+)-dependent protease activity toward DdrO, a transcription factor that suppresses DDR genes’ expression. Recognition sequence-specificity around the PprI cleavage site is essential for DNA damage repair in vivo. PprI and DdrO mediate a novel DNA damage response pathway differing from the classic LexA-mediated SOS response system found in radiation-sensitive bacterium Escherichia coli. This PprI-mediated pathway in D. radiodurans is indispensable for its extreme radio-resistance and therefore its elucidation significantly advances our understanding of the DNA damage repair mechanism in this amazing organism.
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影响因子:
2.9
作者:
Hsu, Hsin-Fang;Ngo, Khanh V.;Chitteni-Pattu, Sindhu;Cox, Michael M.;Li, Hung-Wen
通讯作者:
Li, Hung-Wen
影响因子:
3.2
作者:
Grainger, DC;Overton, TW;Busby, SJW
通讯作者:
Busby, SJW
影响因子:
4.2
作者:
Sun H;Xu G;Zhan H;Chen H;Sun Z;Tian B;Hua Y
通讯作者:
Hua Y
DOI:
10.1016/s0006-291x(03)00965-3
发表时间:
2003-06-27
影响因子:
3.1
作者:
Hua, YJ;Narumi, I;Shen, BH
通讯作者:
Shen, BH
影响因子:
3.6
作者:
Ludanyi, Monika;Blanchard, Laurence;de Groot, Arjan
通讯作者:
de Groot, Arjan