SR proteins SRp20 and 9G8 contribute to efficient export of herpes simplex virus 1 mRNAs.

SR proteins SRp20 and 9G8 contribute to efficient export of herpes simplex virus 1 mRNAs.
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DOI:
10.1016/j.virol.2010.02.023
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发表时间:
2010-06-05
期刊:
影响因子:
3.7
通讯作者:
Sandri-Goldin RM
Sandri-Goldin RM
中科院分区:
医学3区
文献类型:
--
作者:
Escudero-Paunetto L;Li L;Hernandez FP;Sandri-Goldin RM

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单纯疱疹病毒1 (HSV-1) mrna通过输出受体TAP/NFX1输出到细胞质中。HSV-1多功能蛋白ICP27与TAP/NXF1相互作用,结合病毒RNA,是有效的病毒RNA输出所必需的。在ICP27突变体感染中,病毒RNA输出减少但不消失,这表明其他输出接头可以帮助病毒RNA输出。输出接头蛋白Aly/REF被招募到病毒复制区室,然而,Aly/REF敲低对病毒RNA输出的影响很小。SR蛋白SRp20和9G8与TAP/NXF1相互作用,介导一些细胞rna的输出。我们报道SRp20或9G8的siRNA敲低导致病毒产量和聚(a +) RNA的核积累减少约10倍。在SRp20缺失的感染细胞中,新转录的溴嘧啶标记RNA也在细胞核中积累。我们认为SRp20和9G8参与了HSV-1 RNA的输出。
Herpes simplex virus 1 (HSV-1) mRNAs are exported to the cytoplasm through the export receptor TAP/NFX1. HSV-1 multifunctional protein ICP27 interacts with TAP/NXF1, binds viral RNAs, and is required for efficient viral RNA export. In ICP27 mutant infections, viral RNA export is reduced but not ablated, indicating that other export adaptors can aid in viral RNA export. Export adaptor protein Aly/REF is recruited to viral replication compartments, however, Aly/REF knockdown has little effect on viral RNA export. SR proteins SRp20 and 9G8 interact with TAP/NXF1 and mediate export of some cellular RNAs. We report that siRNA knockdown of SRp20 or 9G8 resulted in about a 10 fold decrease in virus yields and in nuclear accumulation of poly(A+) RNA. In infected cells depleted of SRp20, newly transcribed Bromouridine-labelled RNA also accumulated in the nucleus. We conclude that SRp20 and 9G8 contribute to HSV-1 RNA export.
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