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The neutralizing antibody response against a conserved region of human immunodeficiency virus type 1 gp41 (amino acid residues 731-752) is uniquely directed against a conformational epitope

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UNSPECIFIED (1998) The neutralizing antibody response against a conserved region of human immunodeficiency virus type 1 gp41 (amino acid residues 731-752) is uniquely directed against a conformational epitope. JOURNAL OF GENERAL VIROLOGY, 79 (Part 11). pp. 2709-2716. ISSN 0022-1317.

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Abstract

Amino acids 731-752 ((731)PRGPDRPEGIEEEGGERDRDRS(752)) Of the transmembrane glycoprotein gp41 of human immunodeficiency virus type 1 (HIV-1) are conserved in most virus isolates and are controversially reported to be implicated in virus neutralization. The humoral response in infected patients against this region is poor and humans immunized with gp160 show high levels of antibodies against the peptide but poor neutralization titres, Nonetheless, several groups have succeeded in obtaining neutralizing antibodies against this sequence using different antigen-presenting systems. In order to identify the sequence(s) against which the neutralizing response was generated, we used the Rock house virus (FHV) antigen-presenting system to analyse neutralizing antisera from mice immunized with a cowpea mosaic virus (CPMV) chimera expressing the 731-752 sequence. Data show that the neutralizing response is uniquely directed against a conformational epitope mapping to the ERDRD portion of this sequence, although the major antibody response, which is non-linear, and is not neutralizing, is against an IEEE epitope, These results provide an explanation for the controversy regarding the immunogenicity of this region of gp41 and suggest that this conformational epitope, in the absence of the non-neutralizing epitope, should be considered for a subunit vaccine. In addition, this study highlights the usefulness of antigen-presenting systems that preserve epitope conformation in the investigation of immune responses.

Item Type: Journal Article
Subjects: T Technology > TP Chemical technology
Q Science > QR Microbiology > QR355 Virology
Journal or Publication Title: JOURNAL OF GENERAL VIROLOGY
Publisher: SOC GENERAL MICROBIOLOGY
ISSN: 0022-1317
Official Date: November 1998
Dates:
DateEvent
November 1998UNSPECIFIED
Volume: 79
Number: Part 11
Number of Pages: 8
Page Range: pp. 2709-2716
Publication Status: Published

Data sourced from Thomson Reuters' Web of Knowledge

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