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. 1989 Sep;86(17):6768–6772. doi: 10.1073/pnas.86.17.6768

Principal neutralizing domain of the human immunodeficiency virus type 1 envelope protein.

K Javaherian 1, A J Langlois 1, C McDanal 1, K L Ross 1, L I Eckler 1, C L Jellis 1, A T Profy 1, J R Rusche 1, D P Bolognesi 1, S D Putney 1, et al.
PMCID: PMC297927  PMID: 2771954

Abstract

The principal neutralizing determinant of human immunodeficiency virus type 1 (HIV-1) is located in the external envelope protein, gp120, and has previously been mapped to a 24-amino acid-long sequence (denoted RP135). We show here that deletion of this sequence renders the envelope unable to elicit neutralizing antibodies. In addition, using synthetic peptide fragments of RP135, we have mapped the neutralizing determinant to 8 amino acids and found that a peptide of this size elicits neutralizing antibodies. This sequence contains a central Gly-Pro-Gly that is generally conserved between different HIV-1 isolates and is flanked by amino acids that differ from isolate to isolate. Antibodies elicited by peptides from one isolate do not neutralize two different isolates, and a hybrid peptide, consisting of amino acid sequences from two isolates, elicits neutralizing antibodies to both isolates. By using a mixture of peptides of this domain or a mixture of such hybrid peptides the type-specificity of the neutralizing antibody response to this determinant can perhaps be overcome.

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Selected References

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