A DNA damage response screen identifies RHINO, a 9-1-1 and TopBP1 interacting protein required for ATR signaling.

A DNA damage response screen identifies RHINO, a 9-1-1 and TopBP1 interacting protein required for ATR signaling.
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DOI:
10.1126/science.1203430
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发表时间:
2011-06-10
期刊:
Science (New York, N.Y.)
影响因子:
--
通讯作者:
Elledge SJ
Elledge SJ
中科院分区:
其他
文献类型:
--
作者:
Cotta-Ramusino C;McDonald ER 3rd;Hurov K;Sowa ME;Harper JW;Elledge SJ

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DNA损伤反应(DDR)是一种蛋白激酶级联反应,通过转录和翻译后机制协调DNA修复过程。细胞周期停滞是DDR的标志。我们进行了损伤诱导的细胞周期阻滞筛选,并揭示了范可尼贫血(FA)和同源重组(HR)蛋白在ATR信号传导中的关键作用。需要HR来维持延长的细胞周期停滞和防止大规模基因组不稳定。对100多名成绩优异的复员方案候选人进行了询问,询问他们在复员方案中的作用。三种蛋白质,INTS 7,CLOCK和一种新的蛋白质RHINO,被招募到DNA损伤的位点。RHINO独立地结合Rad 9-Rad 1-Hus 1复合物(9-1-1)和TopBP 1。RHINO被9-1-1复合物募集到DNA损伤位点,并且是促进Chk 1活化所必需的。我们认为RHINO与9-1-1复合物和TopBP 1一起发挥作用,以完全激活ATR。
The DNA damage response (DDR) is a protein kinase cascade that orchestrates DNA repair processes via transcriptional and post-translational mechanisms. Cell cycle arrest is a hallmark of the DDR. We performed a damage-induced cell cycle arrest screen and uncovered a critical role for Fanconi anemia (FA) and homologous recombination (HR) proteins in ATR signaling. HR was required to maintain prolonged cell cycle arrest and to prevent massive genomic instability. Over 100 high scoring DDR candidates were interrogated for their roles in the DDR. Three proteins, INTS7, CLOCK and a novel protein RHINO, are recruited to sites of DNA damage. RHINO independently binds the Rad9-Rad1-Hus1 complex (9-1-1) and TopBP1. RHINO is recruited to sites of DNA damage by the 9-1-1 complex and is necessary to promote Chk1 activation. We suggest that RHINO functions together with the 9-1-1 complex and TopBP1 to fully activate ATR.
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