4U2X

Ebola virus VP24 in complex with Karyopherin alpha 5 C-terminus


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.153 Å
  • R-Value Free: 0.249 
  • R-Value Work: 0.215 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Ebola Virus VP24 Targets a Unique NLS Binding Site on Karyopherin Alpha 5 to Selectively Compete with Nuclear Import of Phosphorylated STAT1.

Xu, W.Edwards, M.R.Borek, D.M.Feagins, A.R.Mittal, A.Alinger, J.B.Berry, K.N.Yen, B.Hamilton, J.Brett, T.J.Pappu, R.V.Leung, D.W.Basler, C.F.Amarasinghe, G.K.

(2014) Cell Host Microbe 16: 187-200

  • DOI: 10.1016/j.chom.2014.07.008

  • PubMed Abstract: 
  • During antiviral defense, interferon (IFN) signaling triggers nuclear transport of tyrosine-phosphorylated STAT1 (PY-STAT1), which occurs via a subset of karyopherin alpha (KPNA) nuclear transporters. Many viruses, including Ebola virus, actively ant ...

    During antiviral defense, interferon (IFN) signaling triggers nuclear transport of tyrosine-phosphorylated STAT1 (PY-STAT1), which occurs via a subset of karyopherin alpha (KPNA) nuclear transporters. Many viruses, including Ebola virus, actively antagonize STAT1 signaling to counteract the antiviral effects of IFN. Ebola virus VP24 protein (eVP24) binds KPNA to inhibit PY-STAT1 nuclear transport and render cells refractory to IFNs. We describe the structure of human KPNA5 C terminus in complex with eVP24. In the complex, eVP24 recognizes a unique nonclassical nuclear localization signal (NLS) binding site on KPNA5 that is necessary for efficient PY-STAT1 nuclear transport. eVP24 binds KPNA5 with very high affinity to effectively compete with and inhibit PY-STAT1 nuclear transport. In contrast, eVP24 binding does not affect the transport of classical NLS cargo. Thus, eVP24 counters cell-intrinsic innate immunity by selectively targeting PY-STAT1 nuclear import while leaving the transport of other cargo that may be required for viral replication unaffected.


    Organizational Affiliation

    Department of Pathology and Immunology, Washington University School of Medicine, St Louis, MO 63110, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Membrane-associated protein VP24
A, B, C
216Zaire ebolavirus (strain Mayinga-76)Gene Names: VP24
Find proteins for Q05322 (Zaire ebolavirus (strain Mayinga-76))
Go to UniProtKB:  Q05322
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Importin subunit alpha-6
D, E, F
175Homo sapiensGene Names: KPNA5
Find proteins for O15131 (Homo sapiens)
Go to Gene View: KPNA5
Go to UniProtKB:  O15131
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CL
Query on CL

Download SDF File 
Download CCD File 
A, B
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.153 Å
  • R-Value Free: 0.249 
  • R-Value Work: 0.215 
  • Space Group: P 31 2 1
Unit Cell:
Length (Å)Angle (°)
a = 103.925α = 90.00
b = 103.925β = 90.00
c = 333.630γ = 120.00
Software Package:
Software NamePurpose
REFMACrefinement
HKL-3000data reduction
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationCountryGrant Number
National Institutes of Health/National Institute Of Allergy and Infectious DiseasesUnited StatesR01AI107056
National Institutes of Health/National Institute Of Allergy and Infectious DiseasesUnited StatesR01AI081914

Revision History 

  • Version 1.0: 2014-08-13
    Type: Initial release
  • Version 1.1: 2014-08-27
    Type: Database references
  • Version 1.2: 2017-09-06
    Type: Author supporting evidence, Derived calculations, Other, Source and taxonomy, Structure summary
  • Version 1.3: 2017-11-01
    Type: Author supporting evidence