Sam68 functions in nuclear export and translation of HIV-1 RNA.

Sam68 functions in nuclear export and translation of HIV-1 RNA.
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DOI:
10.4161/rna.6.4.8920
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发表时间:
2009-09
期刊:
影响因子:
4.1
通讯作者:
Liu Y
Liu Y
中科院分区:
生物学3区
文献类型:
--
作者:
He JJ;Henao-Mejia J;Liu Y

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生产性HIV-1复制主要在转录水平上由HIV-1达特控制,在转录后水平上由HIV-1 Rev控制。已经确定了许多宿主因子参与这些过程。Src相关蛋白Sam 68是一种多功能的RNA结合蛋白,参与多种重要的细胞过程。越来越多的证据支持Sam 68在HIV-1基因表达的两个不同步骤中具有重要的调节功能。Sam 68与HIV-1 Rev蛋白相互作用,直接参与HIV-1未剪接或单剪接RNA的核输出。此外,Sam 68在HIV-1复制的细胞质过程中发挥作用,例如HIV-1 RNA的翻译调节。明确阐明Sam 68在HIV-1基因表达中的精确分子功能是有必要的,并有望明确确立Sam 68作为HIV-1复制的重要宿主因子。
Productive HIV-1 replication is mainly controlled at the transcriptional level by HIV-1 Tat and at the post-transcriptional level by HIV-1 Rev. A number of host factors have been identified to be involved in these processes. Src-associated protein of 68 kDa in mitosis (Sam68) is a multi-functional RNA-binding protein and has been implicated in several important cellular processes. More evidence has accumulated to support an important regulatory function of Sam68 at two distinct steps of HIV-1 gene expression. Sam68 interacts with HIV-1 Rev protein and directly participates in nuclear exportation of HIV-1 unspliced or singly spliced RNA. In addition, Sam68 functions in the cytoplasmic processes of HIV-1 replication such as the translational regulation of HIV-1 RNA. Elucidation of the precise molecular function of Sam68 in HIV-1 gene expression is clearly warranted and is expected to unambiguously establish Sam68 as an important host factor for HIV-1 replication.
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