Poliovirus 2A protease triggers a selective nucleo-cytoplasmic redistribution of splicing factors to regulate alternative pre-mRNA splicing.

Poliovirus 2A protease triggers a selective nucleo-cytoplasmic redistribution of splicing factors to regulate alternative pre-mRNA splicing.
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DOI:
10.1371/journal.pone.0073723
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发表时间:
2013
期刊:
影响因子:
3.7
通讯作者:
Izquierdo JM
Izquierdo JM
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Álvarez E;Castelló A;Carrasco L;Izquierdo JM

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脊髓灰质炎病毒蛋白酶2A(2Apro)通过在感染期间重编程转录和转录后调节事件来阻碍宿主基因表达。在这里,我们表明,2Apro的表达诱导几个重要的RNA结合蛋白和剪接因子的选择性核质易位。亚细胞分级分离研究,连同免疫荧光显微镜显示HuR和TIA 1/TIAR在2Apro表达细胞中的不对称分布,其调节人Fas外显子6的剪接。与该结果一致,HuR的敲低或TIA 1/TIAR的过表达导致Fas外显子6包含在2Apro表达细胞中。因此,脊髓灰质炎病毒2Apro可以通过调节蛋白质在细胞核和细胞质之间的穿梭来靶向选择性前体mRNA剪接。
Poliovirus protease 2A (2Apro) obstructs host gene expression by reprogramming transcriptional and post-transcriptional regulatory events during infection. Here we demonstrate that expression of 2Apro induces a selective nucleo-cytoplasm translocation of several important RNA binding proteins and splicing factors. Subcellular fractionation studies, together with immunofluorescence microscopy revealed an asymmetric distribution of HuR and TIA1/TIAR in 2Apro expressing cells, which modulates splicing of the human Fas exon 6. Consistent with this result, knockdown of HuR or overexpression of TIA1/TIAR, leads to Fas exon 6 inclusion in 2Apro-expressing cells. Therefore, poliovirus 2Apro can target alternative pre-mRNA splicing by regulating protein shuttling between the nucleus and the cytoplasm.
DOI: 10.1155/2011/369648
发表时间: 2011
影响因子: --
作者:
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