The Rad50 coiled-coil domain is indispensable for Mre11 complex functions.

The Rad50 coiled-coil domain is indispensable for Mre11 complex functions.
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DOI:
10.1038/nsmb.2116
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发表时间:
2011-09-04
影响因子:
16.8
通讯作者:
--
中科院分区:
生物学1区
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--
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Mre11复合体(酿酒葡萄球菌中的Mre11、Rad50、Xrs2)在DNA损伤应答中影响多种功能。该复合物包括球形DNA结合域和Rad50钩子域,它们由一个长而延伸的Rad50卷曲线圈域连接。在本研究中,构建了编码线圈结构域截断的rad50等位基因,以确定哪些Mre11复合体功能需要线圈的全长。这些突变破坏了端粒维持,减数分裂DSB的形成,并严重损害了HR,表明需要远距离作用。NHEJ很可能是由Mre11复合体球形结构域介导的,它也因螺旋状结构域和钩状结构域的改变而严重受损,这是它们影响这一过程的第一个证据。这些数据表明,Mre11复函数是由Rad50的卷曲线圈集成的。
The Mre11 complex (Mre11, Rad50, Xrs2 in S. cerevisiae) influences diverse functions in the DNA damage response. The complex comprises the globular DNA binding domain and the Rad50 hook domain which are linked by a long and extended Rad50 coiled coil domain. In this study, rad50 alleles encoding truncations of the coiled coil domain were constructed to determine which Mre11 complex functions required the full length of the coils. These mutations abolished telomere maintenance, meiotic DSB formation, and severely impaired HR, indicating a requirement for long range action. NHEJ, which is likely mediated by the Mre11 complex globular domain was also severely impaired by alteration of the coiled coil and hook domains, providing the first evidence of their influence on this process. These data show that Mre11 complex functions are integrated by the coiled coils of Rad50.
DOI: 10.1016/j.tig.2008.08.007
发表时间: 2008-11
期刊: Trends in genetics : TIG
影响因子: --
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