Nature (London), 2023-11, Vol.623 (7989), p.1026-1033
2023
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- Autor(en) / Beteiligte
- Titel
- HIV-1 Env trimers asymmetrically engage CD4 receptors in membranes
- Ist Teil von
- Nature (London), 2023-11, Vol.623 (7989), p.1026-1033
- Ort / Verlag
- England: Nature Publishing Group
- Erscheinungsjahr
- 2023
- Quelle
- MEDLINE
- Beschreibungen/Notizen
- Human immunodeficiency virus 1 (HIV-1) infection is initiated by binding of the viral envelope glycoprotein (Env) to the cell-surface receptor CD4 . Although high-resolution structures of Env in a complex with the soluble domains of CD4 have been determined, the binding process is less understood in native membranes . Here we used cryo-electron tomography to monitor Env-CD4 interactions at the membrane-membrane interfaces formed between HIV-1 and CD4-presenting virus-like particles. Env-CD4 complexes organized into clusters and rings, bringing the opposing membranes closer together. Env-CD4 clustering was dependent on capsid maturation. Subtomogram averaging and classification revealed that Env bound to one, two and finally three CD4 molecules, after which Env adopted an open state. Our data indicate that asymmetric HIV-1 Env trimers bound to one and two CD4 molecules are detectable intermediates during virus binding to host cell membranes, which probably has consequences for antibody-mediated immune responses and vaccine immunogen design.
- Sprache
- Englisch
- Identifikatoren
- ISSN: 0028-0836, 1476-4687eISSN: 1476-4687DOI: 10.1038/s41586-023-06762-6Titel-ID: cdi_pubmedcentral_primary_oai_pubmedcentral_nih_gov_10686830
- Format
- –
- Schlagworte
- AIDS Vaccines - chemistry, AIDS Vaccines - immunology, Antibodies, Asymmetry, Binding, Capsid - chemistry, Capsid - metabolism, Capsid - ultrastructure, CD4 antigen, CD4 Antigens - chemistry, CD4 Antigens - metabolism, CD4 Antigens - ultrastructure, Cell Membrane - chemistry, Cell Membrane - metabolism, Cell Membrane - ultrastructure, Cell membranes, Cell surface, Cluster analysis, Clustering, Cryoelectron Microscopy, Electron Microscope Tomography, Glycoproteins, HIV, HIV Antibodies - immunology, HIV Envelope Protein gp120 - chemistry, HIV Envelope Protein gp120 - metabolism, HIV Envelope Protein gp120 - ultrastructure, HIV Infections - virology, HIV-1 - chemistry, HIV-1 - ultrastructure, Human immunodeficiency virus, Humans, Immune response, Intermediates, Membranes, Plasma, Protein Multimerization, Receptors, Tomography, Trimers, Vaccines, Virion - chemistry, Virion - metabolism, Virion - ultrastructure, Virus-like particles, Viruses