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. 1989 Mar;63(3):1265–1274. doi: 10.1128/jvi.63.3.1265-1274.1989

The rev (trs/art) protein of human immunodeficiency virus type 1 affects viral mRNA and protein expression via a cis-acting sequence in the env region.

M Hadzopoulou-Cladaras 1, B K Felber 1, C Cladaras 1, A Athanassopoulos 1, A Tse 1, G N Pavlakis 1
PMCID: PMC247823  PMID: 2783738

Abstract

The study of expression of several human immunodeficiency virus type 1 proviral mutants in human cells in the presence or absence of rev (trs/art) protein reveals that rev increases the levels of unspliced and env mRNA and the accumulated structural viral proteins. rev protein produced from appropriate expression vectors fully complements the rev-defective mutants. rev requires the presence of a specific cis-acting sequence for its function. This rev-responsive element sequence has been localized within a 520 base-pair fragment in the env region of human immunodeficiency virus type 1. gag and env expression is coordinately regulated by rev. Two independent cis-acting elements localized in the gag and env regions are responsible for the low levels of gag and env mRNA in the absence of rev. These elements are different than the rev-responsive element and act independent of each other.

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