4M0Q

Ebola virus VP24 structure


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.921 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.209 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

The Marburg Virus VP24 Protein Interacts with Keap1 to Activate the Cytoprotective Antioxidant Response Pathway.

Edwards, M.R.Johnson, B.Mire, C.E.Xu, W.Shabman, R.S.Speller, L.N.Leung, D.W.Geisbert, T.W.Amarasinghe, G.K.Basler, C.F.

(2014) Cell Rep 6: 1017-1025

  • DOI: 10.1016/j.celrep.2014.01.043

  • PubMed Abstract: 
  • Kelch-like ECH-associated protein 1 (Keap1) is a ubiquitin E3 ligase specificity factor that targets transcription factor nuclear factor (erythroid-derived 2)-like 2 (Nrf2) for ubiquitination and degradation. Disrupting Keap1-Nrf2 interaction stabili ...

    Kelch-like ECH-associated protein 1 (Keap1) is a ubiquitin E3 ligase specificity factor that targets transcription factor nuclear factor (erythroid-derived 2)-like 2 (Nrf2) for ubiquitination and degradation. Disrupting Keap1-Nrf2 interaction stabilizes Nrf2, resulting in Nrf2 nuclear accumulation, binding to antioxidant response elements (AREs), and transcription of cytoprotective genes. Marburg virus (MARV) is a zoonotic pathogen that likely uses bats as reservoir hosts. We demonstrate that MARV protein VP24 (mVP24) binds the Kelch domain of either human or bat Keap1. This binding is of high affinity and 1:1 stoichiometry and activates Nrf2. Modeling based on the Zaire ebolavirus (EBOV) VP24 (eVP24) structure identified in mVP24 an acidic loop (K-loop) critical for Keap1 interaction. Transfer of the K-loop to eVP24, which otherwise does not bind Keap1, confers Keap1 binding and Nrf2 activation, and infection by MARV, but not EBOV, activates ARE gene expression. Therefore, MARV targets Keap1 to activate Nrf2-induced cytoprotective responses during infection.


    Organizational Affiliation

    Department Microbiology, Icahn School of Medicine, Mount Sinai, New York, NY 10029, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Membrane-associated protein VP24
A, B
230Zaire ebolavirus (strain Mayinga-76)Gene Names: VP24
Find proteins for Q05322 (Zaire ebolavirus (strain Mayinga-76))
Go to UniProtKB:  Q05322
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.921 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.209 
  • Space Group: P 43 21 2
Unit Cell:
Length (Å)Angle (°)
a = 71.775α = 90.00
b = 71.775β = 90.00
c = 191.165γ = 90.00
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-3000data scaling
DENZOdata reduction
SCALEPACKdata scaling
HKL-3000data reduction
MOLREPphasing
PDB_EXTRACTdata extraction
HKL-3000data collection

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-03-19
    Type: Initial release
  • Version 1.1: 2014-04-02
    Type: Database references
  • Version 1.2: 2014-04-16
    Type: Database references
  • Version 1.3: 2017-11-15
    Type: Refinement description