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M94A0214.TXT
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Document 0214
DOCN M94A0214
TI A cis-acting repressive sequence that overlaps the Rev-responsive
element of human immunodeficiency virus type 1 regulates nuclear
retention of env mRNAs independently of known splice signals.
DT 9412
AU Brighty DW; Rosenberg M; Department of Gene Expression Sciences,
SmithKline Beecham; Pharmaceuticals, King of Prussia, PA 19406-0939.
SO Proc Natl Acad Sci U S A. 1994 Aug 30;91(18):8314-8. Unique Identifier :
AIDSLINE MED/94359921
AB The Rev protein of human immunodeficiency virus type 1 (HIV-1) binds to
an RNA structure, the Rev-responsive element (RRE), to enhance
expression of the viral structural genes by relieving the nuclear
sequestration of incompletely spliced viral transcripts. It has been
suggested that nuclear retention of these mRNAs, in mammalian cells, is
due to the activity of either cis-acting repressive sequence elements or
to inefficient splicing signals. Expression of the HIV-1 envelope gene
in transfected Drosophila cells is also dependent upon Rev coexpression
and, hence, the mechanism of nuclear retention and Rev regulation are
highly conserved. Here we use the Drosophila system to identify a major
cis-acting repressive sequence element that overlaps the RRE and is
responsible for the nuclear entrapment and Rev-dependent expression of
HIV-1 env mRNAs. Moreover, the splice signals spanning env are not
required for nuclear retention or Rev-dependent trans-activation of env
mRNAs. We suggest that the RRE and its associated RNA structure are
necessary for both the repressive and known trans-activation effects of
Rev regulation.
DE Animal Base Sequence Cell Compartmentation Cell Line Cell
Nucleus/METABOLISM Drosophila melanogaster DNA Primers/CHEMISTRY
*Gene Expression Regulation, Viral Gene Products, env/*METABOLISM
*Genes, env HIV-1/*GENETICS Molecular Sequence Data Protein
Precursors/*METABOLISM RNA Splicing RNA, Messenger/GENETICS Support,
U.S. Gov't, P.H.S. Transfection JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).