Crystal Structure of a Human Rhinovirus that Displays Part of the HIV-1 V3 Loop and Induces Neutralizing Antibodies against HIV-1
Ding, J., Smith, A.D., Geisler, S.C., Ma, X., Arnold, G.F., Arnold, E.(2002) Structure 10: 999-1011
- PubMed: 12121655
- DOI: https://doi.org/10.1016/s0969-2126(02)00793-1
- Primary Citation of Related Structures:
1K5M - PubMed Abstract:
We report the 2.7 A resolution structure of a chimeric rhinovirus, MN-III-2, that displays part of the HIV-1 gp120 V3 loop and elicits HIV-neutralizing antibodies. The V3 loop insert is dominated by two type I beta turns. The structures of two adjacent tripeptides resemble those of analogous segments in three Fab/V3 loop peptide complexes. Although two of the three corresponding antibodies bind and neutralize MN-III-2 well, only one of the three can bind without significant rearrangement. These results suggest that the V3 loop insert: (1) can share some local conformational similarity to V3 loop sequences presented on different structural frameworks; (2) must be able to adopt multiple conformations, even in a relatively constrained environment; and (3) may mimic the conformational variability of the epitope on HIV-1, increasing the likelihood of eliciting appropriate neutralizing immune responses.
Organizational Affiliation:
Center for Advanced Biotechnology and Medicine (CABM) and Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, 679 Hoes Lane, Piscataway 08854, USA.