7SNQ image
Entry Detail
PDB ID:
7SNQ
Keywords:
Title:
Hexamer HIV-1 CA in complex with CPSF6 peptide and IP6 ligand
Biological Source:
PDB Version:
Deposition Date:
2021-10-28
Release Date:
2022-09-07
Method Details:
Experimental Method:
Resolution:
2.81 Å
R-Value Free:
0.28
R-Value Work:
0.22
R-Value Observed:
0.23
Space Group:
P 21 21 21
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Capsid protein p24
Mutations:A14C, E45C, W184A, M185A
Chain IDs:A, B, C, D, E, F, G, H, I, J, K, L
Chain Length:231
Number of Molecules:12
Biological Source:Human immunodeficiency virus type 1 group M subtype B (isolate BH10)
Polymer Type:polypeptide(L)
Description:Cleavage and polyadenylation specificity factor subunit 6
Chain IDs:M, N, O, P, Q, R, S, T, U, V, W, X
Chain Length:15
Number of Molecules:12
Biological Source:Human immunodeficiency virus 1
Primary Citation
Prion-like low complexity regions enable avid virus-host interactions during HIV-1 infection.
Nat Commun 13 5879 5879 (2022)
PMID: 36202818 DOI: 10.1038/s41467-022-33662-6

Abstact

Cellular proteins CPSF6, NUP153 and SEC24C play crucial roles in HIV-1 infection. While weak interactions of short phenylalanine-glycine (FG) containing peptides with isolated capsid hexamers have been characterized, how these cellular factors functionally engage with biologically relevant mature HIV-1 capsid lattices is unknown. Here we show that prion-like low complexity regions (LCRs) enable avid CPSF6, NUP153 and SEC24C binding to capsid lattices. Structural studies revealed that multivalent CPSF6 assembly is mediated by LCR-LCR interactions, which are templated by binding of CPSF6 FG peptides to a subset of hydrophobic capsid pockets positioned along adjoining hexamers. In infected cells, avid CPSF6 LCR-mediated binding to HIV-1 cores is essential for functional virus-host interactions. The investigational drug lenacapavir accesses unoccupied hydrophobic pockets in the complex to potently impair HIV-1 inside the nucleus without displacing the tightly bound cellular cofactor from virus cores. These results establish previously undescribed mechanisms of virus-host interactions and antiviral action.

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Primary Citation of related structures