home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
The Arsenal Files 6
/
The Arsenal Files 6 (Arsenal Computer).ISO
/
health
/
med9603.zip
/
M9630110.TXT
< prev
next >
Wrap
Text File
|
1996-02-27
|
3KB
|
45 lines
Document 0110
DOCN M9630110
TI Directed integration of viral DNA mediated by fusion proteins consisting
of human immunodeficiency virus type 1 integrase and Escherichia coli
LexA protein.
DT 9603
AU Goulaouic H; Chow SA; Department of Molecular and Medical Pharmacology,
UCLA School of; Medicine 90095, USA.
SO J Virol. 1996 Jan;70(1):37-46. Unique Identifier : AIDSLINE MED/96099411
AB We tested whether the selection of target sites can be manipulated by
fusing retroviral integrase with a sequence-specific DNA-binding
protein. A hybrid protein that has the Escherichia coli LexA protein
fused to the C terminus of the human immunodeficiency virus type 1
integrase was constructed. The fusion protein, IN1-288/LA, retained the
catalytic activities in vitro of the wild-type human immunodeficiency
virus type 1 integrase (WT IN). Using an in vitro integration assay that
included multiple DNA fragment as the target DNA, we found that
IN1-288/LA preferentially integrated viral DNA into the fragment
containing a DNA sequence specifically bound by LexA protein. No bias
was observed when the LexA-binding sequence was absent, when the fusion
protein was replaced by WT IN, or when LexA protein was added in the
reaction containing IN1-288/LA. A majority of the integration events
mediated by IN1-288/LA occurred within 30 bp of DNA flanking the
LexA-binding sequence. The specificity toward the LexA-binding sequence
and the distribution and frequency of target site usage were unchanged
when the integrase component of the fusion protein was replaced with a
variant containing a truncation at the N or C terminus or both,
suggesting that the domain involved in target site selection resides in
the central core region of integrase. The integration bias observed with
the integrase-LexA hybrid shows that one effective means of altering the
selection of DNA sites for integration is by fusing integrase to a
sequence-specific DNA-binding protein.
DE Bacterial Proteins/GENETICS/*METABOLISM Base Sequence Binding Sites
DNA Nucleotidyltransferases/GENETICS/*METABOLISM DNA-Binding
Proteins/GENETICS/*METABOLISM DNA, Viral/METABOLISM Escherichia
coli/*METABOLISM Feasibility Studies Human HIV-1/*ENZYMOLOGY
Molecular Sequence Data Recombinant Fusion Proteins/GENETICS/METABOLISM
Substrate Specificity Support, Non-U.S. Gov't Support, U.S. Gov't,
Non-P.H.S. Support, U.S. Gov't, P.H.S. Virus Integration/*GENETICS
JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).