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M9630073.TXT
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1996-02-27
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Document 0073
DOCN M9630073
TI Production of avian leukosis virus particles in mammalian cells can be
mediated by the interaction of the human immunodeficiency virus protein
Rev and the Rev-responsive element.
DT 9603
AU Nasioulas G; Hughes SH; Felber BK; Whitcomb JM; Gene Expression in
Eukaryotes Section, National Cancer Institute; Frederick Cancer Research
and Development Center, Frederick, MD; 21702-1201, USA.
SO Proc Natl Acad Sci U S A. 1995 Dec 5;92(25):11940-4. Unique Identifier :
AIDSLINE MED/96102231
AB In human immunodeficiency virus type 1-infected cells, the efficient
expression of viral proteins from unspliced and singly spliced RNAs is
dependent on two factors: the presence in the cell of the viral protein
Rev and the presence in the viral RNA of the Rev-responsive element
(RRE). We show here that the HIV-1 Rev/RRE system can increase the
expression of avian leukosis virus (ALV) structural proteins in
mammalian cells (D-17 canine osteosarcoma) and promote the release of
mature ALV virions from these cells. In this system, the Rev/RRE
interaction appears to facilitate the export of full-length unspliced
ALV RNA from the nucleus to the cytoplasm, allowing increased production
of the ALV structural proteins. Gag protein is produced in the cytoplasm
of the ALV-transfected cells even in the absence of a Rev/RRE
interaction. However, a functional Rev/RRE interaction increases the
amount of Gag present intracellularly and, more strikingly, results in
the release of mature ALV particles into the supernatant. RCAS virus
containing an RRE is replication-competent in chicken embryo
fibroblasts; however, we have been unable to determine whether the
particles produced in D-17 cells are as infectious as the particles
produced in chicken embryo fibroblasts.
DE Animal Biological Transport Blotting, Northern Cell Compartmentation
Cell Line Dogs Gene Products, rev/*METABOLISM *Genes, env *HIV-1
Leukosis Virus, Avian/*GROWTH & DEVELOPMENT/GENETICS/ ULTRASTRUCTURE
RNA, Viral/ISOLATION & PURIF Species Specificity Support, U.S. Gov't,
P.H.S. Viral Structural Proteins/BIOSYNTHESIS JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).