Document 0762 DOCN M9480762 TI A sensitive promoter assay based on the transcriptional activator Tat of the HIV-1 virus. DT 9410 AU Koken SE; van Wamel J; Berkhout B; Department of Virology, University of Amsterdam, The Netherlands. SO Gene. 1994 Jul 8;144(2):243-7. Unique Identifier : AIDSLINE MED/94314223 AB We developed a sensitive vector system for the analysis of weak promoter activities. This promoter assay is based on the transcriptional activator protein, Tat, of human immunodeficiency virus type 1 (HIV-1). High-level expression of HIV requires activation in trans by Tat of the promoter in the long terminal repeat (LTR). Here we describe the construction of a promoterless pTat vector. Foreign promoter elements can be inserted upstream from the tat gene, and expression of Tat protein is measured in trans on a co-transfected LTR-CAT reporter plasmid. We show that this binary system is more sensitive than standard pCAT reporter assays. DE Animal Cell Line Chloramphenicol Acetyltransferase/GENETICS Gene Products, tat/*GENETICS Genetic Vectors Hela Cells Human HIV Long Terminal Repeat HIV-1/*GENETICS/METABOLISM Mice Plasmids *Promoter Regions (Genetics) Rats Sensitivity and Specificity Support, Non-U.S. Gov't 3T3 Cells JOURNAL ARTICLE SOURCE: National Library of Medicine. NOTICE: This material may be protected by Copyright Law (Title 17, U.S.Code).