Cited by 235HIV Research and TreatmentMonoclonal and Polyclonal Antibodies ResearchSARS-CoV-2 and COVID-19 Research

Mechanism of Neutralization by the Broadly Neutralizing HIV-1 Monoclonal Antibody VRC01

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Li, Yuxing, O'Dell, Sijy, Walker, Laura M., Wu, Xueling, Guenaga, Javier, Feng, Yu, Schmidt, Stephen D., McKee, Krisha +7 more·2011·Journal of Virology

Abstract

The structure of VRC01 in complex with the HIV-1 gp120 core reveals that this broadly neutralizing CD4 binding site (CD4bs) antibody partially mimics the interaction of the primary virus receptor, CD4, with gp120. Here, we extended the investigation of the VRC01-gp120 core interaction to the biologically relevant viral spike to better understand the mechanism of VRC01-mediated neutralization and to define viral elements associated with neutralization resistance. In contrast to the interaction of CD4 or the CD4bs monoclonal antibody (MAb) b12 with the HIV-1 envelope glycoprotein (Env), occlusion of the VRC01 epitope by quaternary constraints was not a major factor limiting neutralization. Mutagenesis studies indicated that VRC01 contacts within the gp120 loop D, the CD4 binding loop, and the V5 region were necessary for optimal VRC01 neutralization, as suggested by the crystal structure. In contrast to interactions with the soluble gp120 monomer, VRC01 interaction with the native viral spike did not occur in a CD4-like manner; VRC01 did not induce gp120 shedding from the Env spike or enhance gp41 membrane proximal external region (MPER)-directed antibody binding to the Env spike. Finally, VRC01 did not display significant reactivity with human antigens, boding well for potential in vivo applications. The data indicate that VRC01 interacts with gp120 in the context of the functional spike in a manner distinct from that of CD4. It achieves potent neutralization by precisely targeting the CD4bs without requiring alterations of Env spike configuration and by avoiding steric constraints imposed by the quaternary structure of the functional Env spike.

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Crossref · 10.1128/jvi.00754-11

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  • Novel strategies against HIV and influenza involve delivering mRNA vaccines that target conserved regions such as the haemagglutinin stalk on influenza, or encoding broadly neutralizing antibodies such as VRC01 that bind to conserved regions of the CD4 binding site on the HIV gp120 protein.

    “Novel strategies against these viruses involve delivering mRNA vaccines that target conserved regions such as the haemagglutinin stalk on influenza149, or encodeing broadly neutralizing antibodies such as VRC01 that bind to conserved regions of the CD4 binding site on the HIV gp120 protein206.”

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Authors
Li, Y., O'Dell, S., Walker, L. M., Wu, X., Guenaga, J., Feng, Y., Schmidt, S. D., McKee, K., Louder, M. K., Ledgerwood, J. E., Graham, B. S., Haynes, B. F., Burton, D. R., Wyatt, R. T., & Mascola, J. R.
Affiliations
  • National Institutes of Health (US)
  • Scripps Research Institute (US)
  • Duke Medical Center (US)
Venue
Journal of Virology
Published
2011-09
Volume
85
Issue
17
Pages
8954-8967
ISSN
  • 0022-538X (ISSN-L)
  • 1098-5514
OpenAlex
W2165692875
Cited by
235
References
77
Citations by year
2026: 9 · 2025: 11 · 2024: 5 · 2023: 5 · 2022: 10 · 2021: 14 · 2020: 8 · 2019: 17 · 2018: 18 · 2017: 19 · 2016: 23 · 2015: 22 · 2014: 16 · 2013: 21 · 2012: 30
FWCI
9.24
Type
journal article
Language
en
Open access
Locations
  • Journal of Virology (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health
  • National Institute of Allergy and Infectious Diseases (R01AI033292)
Topics
  • Life Sciences › Immunology and Microbiology › Virology › HIV Research and Treatment
  • Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Monoclonal and Polyclonal Antibodies Research
  • Health Sciences › Medicine › Infectious Diseases › SARS-CoV-2 and COVID-19 Research
Keywords
VRC01, broadly neutralizing antibodies, HIV-1, CD4 binding site, gp120, CD4 receptor, neutralization resistance, steric constraints
MeSH terms
Antibodies, Monoclonal, Binding Sites, Enzyme-Linked Immunosorbent Assay, Humans, Models, Molecular, Neutralization Tests, Protein Binding, HIV-1, HIV Envelope Protein gp120, Mutagenesis, Site-Directed, Mutant Proteins, Antibodies, Neutralizing

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