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Immunochemical analysis of the gp120 surface glycoprotein of human immunodeficiency virus type 1: probing the structure of the C4 and V4 domains and the interaction of the C4 domain with the V3 loop.


J Virol. 1993 Aug;67(8):4785-96. Unique Identifier : AIDSLINE

We have probed the structure of the C4 and V3 domains of human immunodeficiency virus type 1 gp120 by immunochemical techniques. Monoclonal antibodies (MAbs) recognizing an exposed gp120 sequence, (E/K)VGKAMYAPP, in C4 were differentially sensitive to denaturation of gp120, implying a conformational component to some of the epitopes. The MAbs recognizing conformation-sensitive C4 structures failed to bind to a gp120 mutant with an alteration in the sequence of the V3 loop, and their binding to gp120 was inhibited by both V3 and C4 MAbs. This implies an interaction between the V3 and C4 regions of gp120, which is supported by the observation that the binding of some MAbs to the V3 loop was often enhanced by amino acid changes in an around the C4 region.

Amino Acid Sequence Animal Antibodies, Monoclonal/*METABOLISM Binding Sites, Antibody Binding, Competitive Cells, Cultured Epitopes/ANALYSIS/CHEMISTRY Human HIV Envelope Protein gp120/ANALYSIS/*CHEMISTRY/IMMUNOLOGY HIV-1/IMMUNOLOGY/*METABOLISM Kinetics Mice/IMMUNOLOGY Models, Structural Molecular Sequence Data *Protein Conformation Recombinant Proteins/ANALYSIS/CHEMISTRY/IMMUNOLOGY Support, Non-U.S. Gov't Support, U.S. Gov't, P.H.S. Variation (Genetics) JOURNAL ARTICLE


Information in this article was accurate in October 30, 1993. The state of the art may have changed since the publication date. This material is designed to support, not replace, the relationship that exists between you and your doctor. Always discuss treatment options with a doctor who specializes in treating HIV.