8TY6 image
Deposition Date 2023-08-24
Release Date 2024-03-06
Last Version Date 2024-11-06
Entry Detail
PDB ID:
8TY6
Keywords:
Title:
Disulfide-stabilized HIV-1 CA hexamer in complex with PQBP1 Nt
Biological Source:
Source Organism:
Method Details:
Experimental Method:
Resolution:
3.30 Å
Aggregation State:
PARTICLE
Reconstruction Method:
SINGLE PARTICLE
Macromolecular Entities
Polymer Type:polypeptide(L)
Molecule:Capsid protein p24
Gene (Uniprot):gag
Mutations:A14C, E45C, W184A, M185A
Chain IDs:A, B, C, D, E, F
Chain Length:231
Number of Molecules:6
Biological Source:Human immunodeficiency virus 1
Ligand Molecules
Primary Citation
Molecular Determinants of PQBP1 Binding to the HIV-1 Capsid Lattice.
J.Mol.Biol. 436 168409 168409 (2024)
PMID: 38128824 DOI: 10.1016/j.jmb.2023.168409

Abstact

Human immunodeficiency virus type 1 (HIV-1) stimulates innate immune responses upon infection, including cyclic GMP-AMP synthase (cGAS) signaling that results in type I interferon production. HIV-1-induced activation of cGAS requires the host cell factor polyglutamine binding protein 1 (PQBP1), an intrinsically disordered protein that bridges capsid recognition and cGAS recruitment. However, the molecular details of PQBP1 interactions with the HIV-1 capsid and their functional implications remain poorly understood. Here, we show that PQBP1 binds to HIV-1 capsids through charge complementing contacts between acidic residues in the N-terminal region of PQBP1 and an arginine ring in the central channel of the HIV-1 CA hexamer that makes up the viral capsid. These studies reveal the molecular details of PQBP1's primary interaction with the HIV-1 capsid and suggest that additional elements are likely to contribute to stable capsid binding.

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Disease

Primary Citation of related structures