A single XLF dimer bridges DNA ends during nonhomologous end joining.
A single XLF dimer bridges DNA ends during nonhomologous end joining.
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DOI:
10.1038/s41594-018-0120-y
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发表时间:
2018-09
影响因子:
16.8
通讯作者:
Loparo JJ
中科院分区:
文献类型:
--
作者:
Graham TGW;Carney SM;Walter JC;Loparo JJ
Non-homologous end joining (NHEJ) is the primary pathway of DNA double-strand break repair in vertebrate cells, yet it remains unclear how NHEJ factors assemble a synaptic complex that bridges DNA ends. To address the role of XRCC4-like factor (XLF) in synaptic complex assembly, we employed single-molecule fluorescence imaging in Xenopus laevis egg extract, a system that efficiently joins DNA ends. We find that a single XLF dimer binds to DNA substrates just prior to formation of a ligation-competent synaptic complex between DNA ends. The interaction of both globular head domains of the XLF dimer with XRCC4 is required for efficient formation of this synaptic complex. In contrast to a model in which filaments of XLF and XRCC4 bridge DNA ends, our results indicate that binding of a single XLF dimer facilitates the assembly of a stoichiometrically well-defined synaptic complex.
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影响因子:
10.5
作者:
Graham TG;Wang X;Song D;Etson CM;van Oijen AM;Rudner DZ;Loparo JJ
通讯作者:
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影响因子:
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作者:
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通讯作者:
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DOI:
10.1073/pnas.94.9.4267
发表时间:
1997-04-29
影响因子:
11.1
作者:
Cary, RB;Peterson, SR;Chen, DJ
通讯作者:
Chen, DJ