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1996-02-26
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Document 1024
DOCN M9621024
TI Molecular cloning and characterization of a TAR-binding nuclear factor
from T cells.
DT 9602
AU Reddy TR; Suhasini M; Rappaport J; Looney DJ; Kraus G; Wong-Staal F;
Department of Medicine, University of California, San Diego, La; Jolla
92093-0665, USA.
SO AIDS Res Hum Retroviruses. 1995 Jun;11(6):663-9. Unique Identifier :
AIDSLINE GENBANK/L22453
AB The TAt protein of the human immunodeficiency virus type 1 (HIV-1)
activates the expression of viral mRNA through a cis-acting element in
the LTR termed TAR. TAR RNA forms a stable stem-loop structure.
Mutagenesis studies indicate that the stem structure, the primary
sequence of the loop, and three unpaired bases in the stem (bulge) are
important for Tat activation. Using the in vitro-transcribed TAR RNA as
a probe, we have cloned a gene (TARBP-b) that encodes a TAR-binding
protein from a cDNA expression library derived from Hut-78 cells.
Expression of the 1.4-kb TARBP-b mRNA was observed in all mammalian cell
lines tested. TARBP-b binds specifically to the bulge region of TAR RNA
and trans-activates the HIV-1 long terminal repeat in the presence of
ptat and prev expression plasmids. These results suggest that TARBP-b
contributes to tat-mediated trans-activation.
DE Amino Acid Sequence Animal Base Sequence Cell Line Gene Expression
Regulation, Viral/GENETICS Gene Products, rev/PHYSIOLOGY Gene
Products, tat/PHYSIOLOGY Genes, Viral/GENETICS Human HIV Long
Terminal Repeat/GENETICS HIV-1/*GENETICS Lymphocytes/VIROLOGY Mice
Molecular Sequence Data Nucleic Acid Conformation RNA Probes
RNA-Binding Proteins/CHEMISTRY/*GENETICS RNA, Messenger/BIOSYNTHESIS
RNA, Viral/CHEMISTRY/*METABOLISM Sequence Analysis, DNA Support, U.S.
Gov't, P.H.S. T-Lymphocytes/*VIROLOGY Trans-Activation
(Genetics)/*GENETICS JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).