home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
The Arsenal Files 6
/
The Arsenal Files 6 (Arsenal Computer).ISO
/
health
/
med9604b.zip
/
M9640656.TXT
< prev
next >
Wrap
Text File
|
1996-03-04
|
3KB
|
42 lines
Document 0656
DOCN M9640656
TI Nuclear preservation and cytoplasmic degradation of human
immunodeficiency virus type 1 Rev protein.
DT 9604
AU Kubota S; Duan L; Furuta RA; Hatanaka M; Pomerantz RJ; Dorrance H.
Hamilton Laboratories, Department of Medicine,; Jefferson Medical
College, Thomas Jefferson University,; Philadelphia, Pennsylvania, USA.
SO J Virol. 1996 Feb;70(2):1282-7. Unique Identifier : AIDSLINE
MED/96135251
AB Rev, a major regulatory protein of human immunodeficiency virus type 1,
has been demonstrated to shuttle between the nucleus and cytoplasm of
infected cells. The fate of the Rev protein in living cells was
evaluated by pulse-chase experiments using a transient Rev expression
system. Sixteen hours after chasing with unlabelled amino acids, 45% of
the labelled Rev was still present, which clearly indicates a long
half-life of Rev in living cells. A Rev mutant which is deficient in the
ability to migrate from the nucleus to the cytoplasm was degraded more
slowly than the wild-type Rev protein. As well, another Rev mutant
protein, which lacks a functional nucleolar targeting signal (NOS) and
is unable to enter the cell nucleus, was rapidly degraded and
undetectable 16 h after chasing. Nuclear-nucleolar targeting properties
provided by a divergent NOS from a related retrovirus, which was used to
substitute for the NOS of Rev, increased the intracellular half-life of
this Rev mutant. Moreover, coexpression of an intracellular anti-Rev
single-chain antibody (SFv), which has been shown to interfere with the
nuclear translocation of Rev, accelerated the degradation of the
wild-type Rev protein. Differential degradation of Rev in the nucleus
and cytoplasm may play a critical role in determining and maintaining
different stages of human immunodeficiency virus type 1 infection, in
conjunction with the shuttling properties of the Rev protein.
DE Amino Acid Sequence Animal Antibodies, Monoclonal/METABOLISM Cell
Line, Transformed Cell Nucleus/METABOLISM Chimeric Proteins/METABOLISM
Cytoplasm/METABOLISM Gene Products, rev/*METABOLISM Gene Products,
rex/GENETICS/METABOLISM Half-Life Human HIV-1/*METABOLISM Molecular
Sequence Data Mutation Recombinant Fusion Proteins/GENETICS/METABOLISM
Support, U.S. Gov't, P.H.S. JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).