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M9460577.TXT
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1994-06-25
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Document 0577
DOCN M9460577
TI Single amino acid substitution (58Pro-->Ser) in HTLV-I tax results in
loss of ras cooperative focus formation in rat embryo fibroblasts.
DT 9408
AU Matsumoto K; Akashi K; Shibata H; Yutsudo M; Hakura A; Osaka Red Cross
Blood Center, Japan.
SO Virology. 1994 May 1;200(2):813-5. Unique Identifier : AIDSLINE
MED/94233748
AB Two tax genes cloned from a healthy HTLV-I carrier in whom the viral
genome is clonally integrated into peripheral CD4+CD8+ cells showed a
considerable difference in ras cooperative focus forming ability in rat
embryo fibroblasts (REF). Sequence analysis revealed differences in two
codons of the two genes. SH-1tax and SH-2tax. Studies using recombinants
between these two tax genes showed that the deficiency in ability of
SH-1tax to cooperate with ras in focus formation in REF was caused by a
58Pro-->Ser substitution. This amino acid substitution did not affect
other tax functions such as colony formation in soft agar, focus
formation in Rat-1 cells, immortalization of REF, and transcriptional
activation through the CREB/ATF and NFkB/rel pathways. These results
suggest that the domain of tax required for cooperative focus formation
with ras in primary rat fibroblasts may be different from those required
for other tax functions.
DE Animal Case Report Cell Transformation, Viral/*GENETICS Cloning,
Molecular Fibroblasts Gene Products, tax/*GENETICS Genes,
ras/*GENETICS Human HTLV-I/*GROWTH & DEVELOPMENT/GENETICS HTLV-I
Infections/*MICROBIOLOGY Mutation Plaque Assay Proline/GENETICS Rats
T-Lymphocyte Subsets/MICROBIOLOGY Trans-Activation (Genetics) Virus
Integration JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).