Nucleolar and coiled-body phosphoprotein 1 (NOLC1) regulates the nucleolar retention of TRF2.

Nucleolar and coiled-body phosphoprotein 1 (NOLC1) regulates the nucleolar retention of TRF2.
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核仁和卷曲体磷蛋白 1 (NOLC1) 调节 TRF2 的核仁保留

DOI:
10.1038/cddiscovery.2017.43
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发表时间:
2017
影响因子:
7
通讯作者:
Tong T
Tong T
中科院分区:
医学2区
文献类型:
--
作者:
Yuan F;Li G;Tong T

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端粒重复序列结合因子2(TRF2)被报道以细胞周期依赖的方式定位在人类细胞的核仁中,但其潜在的机制尚不清楚。在此,我们发现在人293T和HepG2细胞中,核仁和盘状体磷蛋白1(NOLC1)与TRF2相互作用,并介导TRF2在核仁和细胞核之间的穿梭。消融NOLC1表达后,TRF2核内病灶数目增加,核仁水平降低。相反,NOLC1的过表达促进了TRF2的核仁积累。NOLC1的过表达也增加了53BP1的数目,并诱导了DNA损伤反应。此外,TRF2的共表达挽救了NOLC1过表达诱导的细胞周期停滞和细胞凋亡。
Telomeric repeat-binding factor 2 (TRF2) was reported to localize in the nucleolus of human cells in a cell cycle-dependent manner; however, the underlying mechanism remains unclear. Here, we found that nucleolar and coiled-body phosphoprotein 1 (NOLC1) interacted with TRF2 and mediated the shuttling of TRF2 between the nucleolus and nucleus in human 293T and HepG2 cells. Ablation of NOLC1 expression increased the number of nuclear TRF2 foci and decreased the nucleolar level of TRF2. Conversely, NOLC1 overexpression promoted the nucleolar accumulation of TRF2. NOLC1 overexpression also increased the number of 53BP1 foci and induced the DNA damage response. In addition, co-expression of TRF2 rescued NOLC1 overexpression-induced cell cycle arrest and apoptosis.
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发表时间: 2005
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