Association of HIV-1 Tat with the cellular protein, Purα, is mediated by RNA
Year: 1999
Type: article
Abstract: The interaction between two regulatory proteins plays a crucial role in the control of several biological events, including gene transcription. In this report, we demonstrate that the interaction between the cellular sequence-specific single-stranded DNA binding protein Puralpha and the HIV type 1 (HIV-1) Tat protein is mediated by specific ribonucleic acids. The region of Tat that is important for its interaction with Puralpha includes the region demonstrated to bind Tat's viral RNA target, TAR. A 10-nucleotide GC-rich consensus sequence identified in RNAs associated with Puralpha derived from human U-87MG cells plays an important role in the Puralpha:Tat interaction as examined by an in vitro reconstitution assay. Furthermore, expression of the Puralpha-associated RNA in these cells enhances transcriptional activation of the HIV-1 promoter by Tat and Puralpha.
Authors: Gary L. Gallia, Nune Darbinian, Anna Tretiakova, Sameer A. Ansari, Jay Rappaport, John Brady, Margaret J. Wortman, Edward M. Johnson, Kamel Khalili
Language: English
Topic: HIV Research and Treatment
Subfield: Virology
Field: Immunology and Microbiology
Domain: Life Sciences
Open Access status: green
OpenAlex ID: W1972800880