Alternative splicing regulation of cell-cycle genes by SPF45/SR140/CHERP complex controls cell proliferation.

Alternative splicing regulation of cell-cycle genes by SPF45/SR140/CHERP complex controls cell proliferation.
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DOI:
10.1261/rna.078935.121
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发表时间:
2021-12
期刊:
RNA (New York, N.Y.)
影响因子:
--
通讯作者:
Valcárcel J
Valcárcel J
中科院分区:
其他
文献类型:
--
作者:
Martín E;Vivori C;Rogalska M;Herrero-Vicente J;Valcárcel J

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前体mRNA加工的调节对细胞分裂和癌细胞增殖的控制具有重要影响,但其潜在的分子机制仍然知之甚少。我们报道了三个剪接因子,SPF45,SR140和CHERP,形成了一个紧密的物理和功能一致的复合体,调节各种选择性剪接事件,通常通过抑制侧接次优3 ′剪接位点的短外显子。这些包括嵌入在细胞周期进程中具有重要功能的基因中的替代外显子,包括G2/M关键调节因子FOXM1和纺锤体调节因子SPDL1。这三种因子中的任何一种的敲除都会导致HeLa细胞G2/M期阻滞并增强细胞凋亡。促进由SPF 45/SR140/CHERP敲低诱导的FOXM1或SPDL1剪接的变化部分地概括了对细胞生长的影响,认为该复合物协调了有效细胞增殖所必需的可变剪接程序。
The regulation of pre-mRNA processing has important consequences for cell division and the control of cancer cell proliferation, but the underlying molecular mechanisms remain poorly understood. We report that three splicing factors, SPF45, SR140, and CHERP, form a tight physical and functionally coherent complex that regulates a variety of alternative splicing events, frequently by repressing short exons flanked by suboptimal 3′ splice sites. These comprise alternative exons embedded in genes with important functions in cell-cycle progression, including the G2/M key regulator FOXM1 and the spindle regulator SPDL1. Knockdown of either of the three factors leads to G2/M arrest and to enhanced apoptosis in HeLa cells. Promoting the changes in FOXM1 or SPDL1 splicing induced by SPF45/SR140/CHERP knockdown partially recapitulates the effects on cell growth, arguing that the complex orchestrates a program of alternative splicing necessary for efficient cell proliferation.
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