8C8T image
Entry Detail
PDB ID:
8C8T
EMDB ID:
Keywords:
Title:
cryo-EM structure of BG505 SOSIP.664 HIV-1 Env trimer in complex with bNAbs EPTC112 and 3BNC117
Biological Source:
Host Organism:
PDB Version:
Deposition Date:
2023-01-21
Release Date:
2023-07-05
Method Details:
Experimental Method:
Resolution:
3.20 Å
Aggregation State:
PARTICLE
Reconstruction Method:
SINGLE PARTICLE
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Envelope glycoprotein gp160
Chain IDs:A, D (auth: F), E (auth: G)
Chain Length:469
Number of Molecules:3
Biological Source:Human immunodeficiency virus 1
Polymer Type:polypeptide(L)
Description:Gp41 Bg505 T332n Sosip.664
Chain IDs:B, G (auth: I), H (auth: J)
Chain Length:145
Number of Molecules:3
Biological Source:Human immunodeficiency virus 1
Polymer Type:polypeptide(L)
Description:IgG EPTC112 Fab fragment heavy chain
Chain IDs:C, F (auth: H)
Chain Length:233
Number of Molecules:2
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Description:IgG EPTC112 Fab Light Chain
Chain IDs:M (auth: D), N (auth: K)
Chain Length:216
Number of Molecules:2
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Description:IgG 3BNC117 Fab heavy chain
Chain IDs:I (auth: R), J (auth: S)
Chain Length:226
Number of Molecules:2
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Description:IgG 3BNC117 Fab Light Chain
Chain IDs:K (auth: T), L (auth: U)
Chain Length:206
Number of Molecules:2
Biological Source:Homo sapiens
Ligand Molecules
Primary Citation
Anti-V1/V3-glycan broadly HIV-1 neutralizing antibodies in a post-treatment controller.
Cell Host Microbe 31 1275 ? (2023)
PMID: 37433296 DOI: 10.1016/j.chom.2023.06.006

Abstact

HIV-1 broadly neutralizing antibodies (bNAbs) can decrease viremia but are usually unable to counteract autologous viruses escaping the antibody pressure. Nonetheless, bNAbs may contribute to natural HIV-1 control in individuals off antiretroviral therapy (ART). Here, we describe a bNAb B cell lineage elicited in a post-treatment controller (PTC) that exhibits broad seroneutralization and show that a representative antibody from this lineage, EPTC112, targets a quaternary epitope in the glycan-V3 loop supersite of the HIV-1 envelope glycoprotein. The cryo-EM structure of EPTC112 complexed with soluble BG505 SOSIP.664 envelope trimers revealed interactions with N301- and N156-branched N-glycans and the 324GDIR327 V3 loop motif. Although the sole contemporaneous virus circulating in this PTC was resistant to EPTC112, it was potently neutralized by autologous plasma IgG antibodies. Our findings illuminate how cross-neutralizing antibodies can alter the HIV-1 infection course in PTCs and may control viremia off-ART, supporting their role in functional HIV-1 cure strategies.

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