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XB-ART-10347
J Virol 2000 Oct 01;7419:8938-45.
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Association of human immunodeficiency virus type 1 Vif with RNA and its role in reverse transcription.

Dettenhofer M , Cen S , Carlson BA , Kleiman L , Yu XF .


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The vif gene of human immunodeficiency virus type 1 (HIV-1) is essential for viral replication, although the functional target of Vif remains elusive. HIV-1 vif mutant virions derived from nonpermissive H9 cells displayed no significant differences in the amount, ratio, or integrity of their protein composition relative to an isogenic wild-type virion. The amounts of the virion-associated viral genomic RNA and tRNA(3)(Lys) were additionally present at normal levels in vif mutant virions. We demonstrate that Vif associates with RNA in vitro as well as with viral genomic RNA in virus-infected cells. A functionally conserved lentivirus Vif motif was found in the double-stranded RNA binding domain of Xenopus laevis, Xlrbpa. The natural intravirion reverse transcriptase products were markedly reduced in vif mutant virions. Moreover, purified vif mutant genomic RNA-primer tRNA complexes displayed severe defects in the initiation of reverse transcription with recombinant reverse transcriptase. These data point to a novel role for Vif in the regulation of efficient reverse transcription through modulation of the virion nucleic acid components.

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Species referenced: Xenopus laevis
Genes referenced: mt-tr trna

References [+] :
Bouyac, Phenotypically Vif- human immunodeficiency virus type 1 is produced by chronically infected restrictive cells. 1997, Pubmed