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 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history


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 ...

    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
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
GAG PROTEINA146Human 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
 ( Mouse scroll to zoom / Hold left click to move )
  • Reference Sequence
  • Find similar proteins by:  Sequence   |   Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
CLEAVAGE AND POLYADENYLATION SPECIFICITY FACTOR SUBUNIT 6B15Homo sapiensMutation(s): 0 
Gene Names: CPSF6CFIM68
Find proteins for Q16630 (Homo sapiens)
Explore Q16630 
Go to UniProtKB:  Q16630
NIH Common Fund Data Resources
PHAROS  Q16630
Protein Feature View
 ( Mouse scroll to zoom / Hold left click to move )
  • 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

View Full Validation Report



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