4B4N

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.813 Å
  • R-Value Free: 0.273 
  • R-Value Work: 0.187 

wwPDB Validation 3D Report Full Report


This is version 1.0 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

  • 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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
GAG PROTEIN
A
146Human immunodeficiency virus 1Mutation(s): 0 
Gene Names: gag
Find proteins for A9PKC6 (Human immunodeficiency virus 1)
Go to UniProtKB:  A9PKC6
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
CLEAVAGE AND POLYADENYLATION SPECIFICITY FACTOR SUBUNIT 6
B
15Homo sapiensMutation(s): 0 
Gene Names: CPSF6 (CFIM68)
Find proteins for Q16630 (Homo sapiens)
Go to Gene View: CPSF6
Go to UniProtKB:  Q16630
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.813 Å
  • R-Value Free: 0.273 
  • R-Value Work: 0.187 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 40.560α = 90.00
b = 46.360β = 90.00
c = 80.820γ = 90.00
Software Package:
Software NamePurpose
SCALAdata scaling
REFMACrefinement
MOSFLMdata reduction
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-09-19
    Type: Initial release