home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
The Arsenal Files 6
/
The Arsenal Files 6 (Arsenal Computer).ISO
/
health
/
med9603.zip
/
M9630588.TXT
< prev
next >
Wrap
Text File
|
1996-02-27
|
3KB
|
41 lines
Document 0588
DOCN M9630588
TI HIV glycoprotein 41 and complement factor H interact with each other and
share functional as well as antigenic homology.
DT 9603
AU Pinter C; Siccardi AG; Lopalco L; Longhi R; Clivio A; Dipartimento di
Biologia e Genetica per le Scienze Mediche,; L.I.T.A. Vialba, Universita
degli Studi di Milano, Italy.
SO AIDS Res Hum Retroviruses. 1995 Aug;11(8):971-80. Unique Identifier :
AIDSLINE MED/96020098
AB We have shown that complement factor H (CFH) interacts with HIV-1 at the
level of the sequence Env 105-119, contained in the C1 domain of gp120.
CFH interaction with HIV was evident only after dissociation of the Env
complex induced by exposure to sCD4. We hypothesized that CFH could act
as a gp41 analog in the interaction with Env 105-119. A panel of
partially overlapping, synthetic peptides reproducing the extracellular
portion of gp41 was therefore used to compete the binding of CFH to Env
105-119. Three sets of peptides that competed this interaction were
identified. These peptides defined a region of functional homology
between the gp41 molecule and CFH (Env 580-600), and two regions of
interaction (Env 620-640 and Env 650-670). In addition to this, a
monoclonal antibody directed against peptide Env 580-600 and a
polyclonal mouse antiserum raised against recombinant gp41 were shown to
recognize CFH in Western blots and ELISA, respectively, also defining a
region of antigenic homology between gp41 and CFH. These data provide
evidence for interaction and molecular mimicry between an HIV structural
protein and a negative regulator of the complement pathway. We show here
that CFH can interact with both HIV Env proteins, suggesting a possible
and efficient mechanism of downregulation of the complement cascade at
the surface of infected cells.
DE Amino Acid Sequence Animal Complement Factor H/IMMUNOLOGY/*METABOLISM
Epitopes/IMMUNOLOGY Human HIV Envelope Protein
gp41/CHEMISTRY/IMMUNOLOGY/*METABOLISM HIV-1/*METABOLISM Mice
Molecular Sequence Data Peptides/CHEMICAL SYNTHESIS/IMMUNOLOGY
Recombinant Proteins/CHEMISTRY/IMMUNOLOGY/METABOLISM Sequence Alignment
Sequence Homology, Amino Acid Support, Non-U.S. Gov't JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).