home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Shareware Overload Trio 2
/
Shareware Overload Trio Volume 2 (Chestnut CD-ROM).ISO
/
dir26
/
med9410p.zip
/
M94A3267.TXT
< prev
next >
Wrap
Text File
|
1994-10-25
|
2KB
|
35 lines
Document 3267
DOCN M94A3267
TI Possible role of dUTPase analog in compositional divergency in evolution
of retriviruses.
DT 9412
AU Blinov VM; Resenchuk SM; Chirikova GB; Denisov SI; Zverev VV; Institute
of Molecular Biology, Koltsovo, Novosibirsk, Russia.
SO Int Conf AIDS. 1994 Aug 7-12;10(1):115 (abstract no. PA0081). Unique
Identifier : AIDSLINE ICA10/94369308
AB HIV, unlike other lentiviruses, has high evolutionary rate in the
accumulation of mutations. Earlier we have revealed a new enzymatic
activity (dUTPase EC 3.6.4.23) in the subfamily of lentiviruses, which
includes VISNA, EIAV, FIV, and CAEV. However, in the subfamily of
lentiviruses including HIV1, HIV2, SIV, and HTLV of type 1 and 2 the
dUTPase-analogous fragment is deleted. As this enzyme takes part in DNA
reparation and nucleotide metabolism, we suggest that the loss of
dUTPase is responsible for the extraordinary variability of the
representatives of the latter subfamily. The significant differences in
the content of C and T pairs between the subfamilies of lentiviruses is
suggested to be due to the absense of dUTPase in HIV1, HIV2, and SIV on
one hand, and the presence of the enzyme in the subfamily of latent
lentiviruses. The role of dUTPase in virus cycle--integration of the
genomes of different lentiviruses in a host chromosome, and the
influence of this process on the pathogenesis of slow (FIV, EIAV, VISNA)
and fast (HIV1, HIV2, SIV) viruses is discussed.
DE Animal Base Composition DNA, Viral/CHEMISTRY/GENETICS *Evolution
Gene Deletion Genes, Viral Human HIV-1/ENZYMOLOGY/GENETICS
HIV-2/ENZYMOLOGY/GENETICS Lentivirus/CLASSIFICATION/ENZYMOLOGY/GENETICS
Mutation Pyrophosphatases/*GENETICS Retroviridae/*ENZYMOLOGY/*GENETICS
Retroviridae Infections/ETIOLOGY MEETING ABSTRACT
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).