home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Shareware Overload Trio 2
/
Shareware Overload Trio Volume 2 (Chestnut CD-ROM).ISO
/
dir26
/
med9408c.zip
/
M9480508.TXT
< prev
next >
Wrap
Text File
|
1994-08-20
|
3KB
|
42 lines
Document 0508
DOCN M9480508
TI Human immunodeficiency virus type 1 integrase: effect on viral
replication of mutations at highly conserved residues.
DT 9410
AU Cannon PM; Wilson W; Byles E; Kingsman SM; Kingsman AJ; Department of
Biochemistry, University of Oxford, United Kingdom.
SO J Virol. 1994 Aug;68(8):4768-75. Unique Identifier : AIDSLINE
MED/94309139
AB Sequence comparisons of the integrase (IN) proteins from different
retroviruses have identified several highly conserved residues. We have
introduced mutations at 16 of these sites into the integrase gene of
human immunodeficiency virus type 1 and analyzed the phenotypes of the
resulting viruses. The viruses were all normal for p24 content and
reverse transcriptase activity. In addition, all of the mutants could
infect T-cell lines and undergo reverse transcription, as assessed by
PCR analysis. Most of the mutant viruses also had normal Western blot
(immunoblot) profiles, although three of the mutations resulted in
reduced signals for IN relative to the wild type on the immunoblots and
mutation of residue W235 completely abolished recognition of the protein
by pooled sera from human immunodeficiency virus type 1-positive
patients. Mutations that have previously been shown to abolish activity
in in vitro studies produced noninfectious viruses. The substitution of
W235 was notable in producing a noninfectious virus, despite previous
reports of this residue being nonessential for IN activity in vitro
(A.D. Leavitt, L. Shiue, and H.E. Varmus, J. Biol. Chem. 268:2113-2119,
1993). In addition, we have identified four highly conserved residues
that can be mutated without any affect on viral replication in T-cell
lines.
DE Amino Acid Sequence Base Sequence Conserved Sequence DNA
Nucleotidyltransferases/GENETICS/*METABOLISM Human HIV Long Terminal
Repeat HIV-1/*ENZYMOLOGY/GENETICS/PHYSIOLOGY Immunodominant
Epitopes/GENETICS/IMMUNOLOGY Leucine Zippers/GENETICS Molecular
Sequence Data Mutagenesis, Site-Directed RNA, Viral Support, Non-U.S.
Gov't T-Lymphocytes/MICROBIOLOGY Viral Proteins/ANALYSIS Virus
Integration *Virus Replication/GENETICS Zinc Fingers/GENETICS JOURNAL
ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).