8GPI image
Entry Detail
PDB ID:
8GPI
EMDB ID:
Keywords:
Title:
HIV-1 Env X18 UFO in complex with 8ANC195 Fab
Biological Source:
PDB Version:
Deposition Date:
2022-08-26
Release Date:
2023-08-09
Method Details:
Experimental Method:
Resolution:
3.00 Å
Aggregation State:
PARTICLE
Reconstruction Method:
SINGLE PARTICLE
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:8ANC195 Fab heavy chain
Chain IDs:A, C (auth: D), E (auth: H)
Chain Length:235
Number of Molecules:3
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Description:8ANC195 Fab light chain
Chain IDs:B (auth: C), D (auth: E), F (auth: L)
Chain Length:215
Number of Molecules:3
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Description:X18 UFO gp41
Chain IDs:G (auth: R), H (auth: S), I (auth: T), J (auth: X), K (auth: Y), L (auth: Z)
Chain Length:622
Number of Molecules:6
Biological Source:Human immunodeficiency virus 1
Ligand Molecules
Primary Citation
Structures and immune recognition of Env trimers from two Asia prevalent HIV-1 CRFs.
Nat Commun 14 4676 4676 (2023)
PMID: 37542068 DOI: 10.1038/s41467-023-40321-x

Abstact

Structure-guided immunofocusing HIV-1 vaccine design entails a comprehensive understanding of Envs from diverse HIV-1 subtypes, including circulating recombinant forms (CRFs). Here, we present the cryo-EM structures of Envs from two Asia prevalent CRFs (CRF01_AE and CRF07_BC) at 3.0 and 3.5 Å. We compare the structures and glycosylation patterns of Envs from different subtypes and perform cross-clade statistical analyses to reveal the unique features of CRF01_AE V1 region, which are associated with the resistance to certain bNAbs. We also solve a 4.1 Å cryo-EM structure of CRF01_AE Env in complex with F6, the first bNAb from CRF01_AE-infected individuals. F6 recognizes a gp120-gp41 spanning epitope to allosterically destabilize the Env trimer apex and weaken inter-protomer packing, which in turn hinders the receptor binding and induces Env trimer disassembly, demonstrating a dual mechanism of neutralization. These findings broaden our understanding of CRF Envs and shed lights on immunofocusing HIV-1 vaccine design.

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Primary Citation of related structures