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首页> 外文期刊>Genes and Development: a Journal Devoted to the Molecular Analysis of Gene Expression in Eukaryotes, Prokaryotes, and Viruses >Checkpoint kinases and the INO80 nucleosome remodeling complex enhance global chromatin mobility in response to DNA damage
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Checkpoint kinases and the INO80 nucleosome remodeling complex enhance global chromatin mobility in response to DNA damage

机译:Checkpoint激酶和INO80核小体重塑复合物可响应DNA损伤而提高整体染色质迁移率

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摘要

Double-strand break repair by recombination requires a homology search. In yeast, induced breaks move significantly more than undamaged loci. To examine whether DNA damage provokes an increase in chromatin mobility generally, we tracked undamaged loci under DNA-damaging conditions. We found that the yeast checkpoint factors Mec1, Rad9, and Rad53 are required for genome-wide increases in chromatin mobility, but not the repair protein Rad51. Mec1 activation by targeted Ddc1/Ddc2 enhances chromatin mobility even in the absence of damage. Finally, the INO80 chromatin remodeler is shown to act downstream from Mec1 to increase chromatin mobility, highlighting an additional damage-related role of this nucleosome remodeling complex.
机译:通过重组的双链断裂修复需要同源性搜索。在酵母中,诱发的断裂比未受损的基因座移动得多。为了检查DNA损伤是否通常引起染色质迁移率的增加,我们追踪了在DNA损伤条件下未受损的基因座。我们发现,酵母检查点因子Mec1,Rad9和Rad53是染色质迁移率在全基因组范围内增加所必需的,而修复蛋白Rad51则不是。靶向Ddc1 / Ddc2激活的Mec1即使在没有损伤的情况下也能增强染色质的迁移率。最终,INO80染色质重塑剂显示出在Mec1下游起作用,以增加染色质迁移率,突显了这种核小体重塑复合物的其他损伤相关作用。

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