home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
The Arsenal Files 6
/
The Arsenal Files 6 (Arsenal Computer).ISO
/
health
/
med9603.zip
/
M9630531.TXT
< prev
next >
Wrap
Text File
|
1996-02-27
|
3KB
|
46 lines
Document 0531
DOCN M9630531
TI Both the changes of six amino acids and the C-terminal truncation caused
by a one-base insertion in the defective env gene of Friend spleen
focus-forming virus significantly affect the pathogenic activity of the
encoded leukemogenic membrane glycoprotein (gp55).
DT 9603
AU Watanabe N; Yugawa T; Ikawa Y; Amanuma H; Laboratory of Gene Technology
and Safety, Tsukuba Life Science; Center, Institute of Physical and
Chemical Research (RIKEN),; Ibaraki, Japan.
SO J Virol. 1995 Dec;69(12):7606-11. Unique Identifier : AIDSLINE
MED/96079005
AB Friend spleen focus-forming virus (F-SFFV) causes acute erythroleukemia
in mice and encodes in its defective env gene an Env-like membrane
glycoprotein (gp55). The F-SFFV env gene has three characteristic
structures compared with that of ecotropic murine leukemia viruses
(MuLVs): substitution by the polytropic MuLV env sequence, a 585-bp
deletion, and a 1-bp insertion. All of these characteristic structures
are essential for the leukemogenic potential of gp55 of
polycythemia-inducing isolates of F-SFFV (F-SFFVp). The 1-bp insertion
causes changes of six amino acids and truncation by 34 amino acids at
the C terminus. In this study, we constructed 12 mutant F-SFFV genomes
starting from the wild-type F-SFFVp and examined the effect of the
C-terminal truncation and the six altered amino acids on the pathogenic
activity of gp55. The results indicated that at least 18 to 24 amino
acids must be deleted from the C terminus for the env product to be
pathogenically active. We also found that the six altered amino acids
contributed significantly to the pathogenic activity of gp55. Analyses
of the cellular processing of these mutant gp55s supported a correlation
between the pathogenic activity of gp55 and its efficiency in overall
cellular processing.
DE Amino Acid Sequence Animal Base Sequence DNA Insertion Elements
*Genes, env Glucosamine/METABOLISM Leukemia Viruses, Murine/GENETICS
Leukemia, Erythroblastic, Acute/PHYSIOPATHOLOGY/*VIROLOGY Leukemia,
Experimental/PHYSIOPATHOLOGY/*VIROLOGY Mice Molecular Sequence Data
Mutagenesis, Insertional Mutagenesis, Site-Directed
Oligodeoxyribonucleotides Recombinant Proteins/BIOSYNTHESIS/METABOLISM
Sequence Deletion Spleen Focus-Forming Viruses/*GENETICS/*PATHOGENICITY
Support, Non-U.S. Gov't Transfection Viral Envelope
Proteins/*BIOSYNTHESIS/METABOLISM Virulence/GENETICS 3T3 Cells
JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).