1887

Abstract

Full-length human immunodeficiency virus type 1 (HIV-1) RNA acts as both mRNA, encoding Gag and Gag–Pol polyproteins, and genomic RNA. Translation of this RNA must be tightly controlled to allow sufficient protein synthesis prior to a switch to particle production. The viral protein Rev stimulates nuclear export of unspliced HIV-1 RNAs containing the Rev response element, but may also stimulate translation of these RNAs. We previously identified an additional Rev binding site in the 5′ untranslated region of the HIV-1 RNA. We show that Rev inhibits translation non-specifically at high concentrations and stimulates translation of HIV-1 RNAs at intermediate concentrations . Stimulation is dependent on the presence of the Rev binding site within the 5′ untranslated region and not on the Rev response element. In COS-1 cells, translation from an HIV-1 reporter is specifically increased by coexpression of Rev.

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2009-05-01
2021-03-07
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