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rev protein of human immunodeficiency virus type 1 affects the stability and transport of the viral mRNA.




 

Proc Natl Acad Sci U S A. 1989 Mar;86(5):1495-9. Unique Identifier :

rev (trs/art) is an essential human immunodeficiency virus type 1 (HIV-1) regulatory protein. rev increases the levels of the gag- and env-producing mRNAs via a cis-acting element in the env region of HIV-1, named rev-responsive element. Our results show that rev increases the stability of the unspliced viral mRNA, while it does not affect the stability of the multiply spliced viral mRNAs that do not contain the rev-responsive element. The study of mutated proviral constructs producing mRNA that cannot be spliced revealed that the effect of rev on stability is independent of splicing. Our experiments also indicate that rev promotes the transport of the viral mRNA containing the rev-responsive element from the nucleus to the cytoplasm. The proposed functions of rev are consistent with its nuclear localization as shown by immunofluorescence. The selective effects of rev on the levels of the viral mRNA suggest a model for feedback regulation by rev leading to a steady state of viral expression.

Cell Nucleus/METABOLISM *Genes, Regulator *Genes, Viral Hela Cells/METABOLISM Human HIV-1/*GENETICS/METABOLISM Plasmids RNA, Messenger/GENETICS/*METABOLISM Support, Non-U.S. Gov't Support, U.S. Gov't, P.H.S. Transcription, Genetic Transfection Viral Proteins/*PHYSIOLOGY JOURNAL ARTICLE



 




Information in this article was accurate in June 30, 1989. The state of the art may have changed since the publication date. This material is designed to support, not replace, the relationship that exists between you and your doctor. Always discuss treatment options with a doctor who specializes in treating HIV.