4B4N

CPSF6 defines a conserved capsid interface that modulates HIV-1 replication

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.81 Å
  • R-Value Free: 0.273 
  • R-Value Work: 0.187 
  • R-Value Observed: 0.191 

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Literature

Cpsf6 Defines a Conserved Capsid Interface that Modulates HIV-1 Replication.

Price, A.J., Fletcher, A.J., Schaller, T., Elliott, T., Lee, K., Kewalramani, V.N., Chin, J.W., Towers, G.J., James, L.C.

(2012) PLoS Pathog 8: 2896

  • DOI: 10.1371/journal.ppat.1002896
  • Primary Citation of Related Structures:  
    4B4N

  • PubMed Abstract: 

    • The HIV-1 genome enters cells inside a shell comprised of capsid (CA) protein. Variation in CA sequence alters HIV-1 infectivity and escape from host restriction factors. However, apart from the Cyclophilin A-binding loop, CA has no known interfaces with ...

    The HIV-1 genome enters cells inside a shell comprised of capsid (CA) protein. Variation in CA sequence alters HIV-1 infectivity and escape from host restriction factors. However, apart from the Cyclophilin A-binding loop, CA has no known interfaces with which to interact with cellular cofactors. Here we describe a novel protein-protein interface in the N-terminal domain of HIV-1 CA, determined by X-ray crystallography, which mediates both viral restriction and host cofactor dependence. The interface is highly conserved across lentiviruses and is accessible in the context of a hexameric lattice. Mutation of the interface prevents binding to and restriction by CPSF6-358, a truncated cytosolic form of the RNA processing factor, cleavage and polyadenylation specific factor 6 (CPSF6). Furthermore, mutations that prevent CPSF6 binding also relieve dependence on nuclear entry cofactors TNPO3 and RanBP2. These results suggest that the HIV-1 capsid mediates direct host cofactor interactions to facilitate viral infection.

    Organizational Affiliation: 

    Medical Research Council Laboratory of Molecular Biology, Division of Protein and Nucleic Acid Chemistry, Cambridge, United Kingdom.



Macromolecules
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(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
GAG PROTEIN A146Human immunodeficiency virus 1Mutation(s): 0 
Gene Names: gag
Find proteins for A9PKC6 (Human immunodeficiency virus 1)
Explore A9PKC6 
Go to UniProtKB:  A9PKC6
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
CLEAVAGE AND POLYADENYLATION SPECIFICITY FACTOR SUBUNIT 6 B15Homo sapiensMutation(s): 0 
Gene Names: CPSF6, CFIM68
Find proteins for Q16630 (Homo sapiens)
Explore Q16630 
Go to UniProtKB:  Q16630
NIH Common Fund Data Resources
PHAROS:  Q16630
GTEx:  ENSG00000111605
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.81 Å
  • R-Value Free: 0.273 
  • R-Value Work: 0.187 
  • R-Value Observed: 0.191 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 40.56α = 90
b = 46.36β = 90
c = 80.82γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
MOSFLMdata reduction
SCALAdata scaling
PHASERphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-09-19
    Type: Initial release
  • Version 1.1: 2019-05-08
    Changes: Data collection, Experimental preparation, Other