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Nature. 1996 Jan 18;379(6562):273-7.

Post-transcriptional transactivation of human retroviral envelope glycoprotein expression by herpes simplex virus Us11 protein.

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Université Claude Bernard, Lyon-1/CNRS UMR30, Faculté de Médecine, Lyon, France.


Herpes simplex virus type 1 (HSV-1) Us11 protein, a true late gene product packaged within the virion, is delivered into cells after infection, exhibits a nucleocytoplasmic localization at early times, and later accumulates in the nucleoli. This RNA-binding basic phosphoprotein, capable of oligomerization, is supposed to be involved in post-transcriptional regulation of gene expression after HSV-1 infection. Expression of human T-cell leukaemia/lymphoma virus type-I (HTLV-I) and of human immunodeficiency virus type 1 (HIV-1) is post-transcriptionally regulated by Rex and Rev, respectively. These proteins are required for the cytoplasmic expression of unspliced gag-pol and singly spliced env transcripts. Here we show that HSV-1 Us11 protein is able to bind Rex- and Rev-responsive elements and to transactivate envelope retroviral glycoprotein expression.

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