4I1S

Melanoma differentiation associated protein-5 Helicase domain complex with inhibitor Non-structural protein V


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.293 Å
  • R-Value Free: 0.230 
  • R-Value Work: 0.179 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Paramyxovirus V proteins disrupt the fold of the RNA sensor MDA5 to inhibit antiviral signaling.

Motz, C.Schuhmann, K.M.Kirchhofer, A.Moldt, M.Witte, G.Conzelmann, K.K.Hopfner, K.P.

(2013) Science 339: 690-693

  • DOI: 10.1126/science.1230949

  • PubMed Abstract: 
  • The retinoic acid-inducible gene I (RIG-I)-like receptor (RLR) melanoma differentiation-associated protein 5 (MDA5) senses cytoplasmic viral RNA and activates antiviral innate immunity. To reveal how paramyxoviruses counteract this response, we deter ...

    The retinoic acid-inducible gene I (RIG-I)-like receptor (RLR) melanoma differentiation-associated protein 5 (MDA5) senses cytoplasmic viral RNA and activates antiviral innate immunity. To reveal how paramyxoviruses counteract this response, we determined the crystal structure of the MDA5 adenosine 5'-triphosphate (ATP)-hydrolysis domain in complex with the viral inhibitor V protein. The V protein unfolded the ATP-hydrolysis domain of MDA5 via a β-hairpin motif and recognized a structural motif of MDA5 that is normally buried in the conserved helicase fold. This leads to disruption of the MDA5 ATP-hydrolysis site and prevention of RNA-bound MDA5 filament formation. The structure explains why V proteins inactivate MDA5, but not RIG-I, and mutating only two amino acids in RIG-I induces robust V protein binding. Our results suggest an inhibition mechanism of RLR signalosome formation by unfolding of receptor and inhibitor.


    Organizational Affiliation

    Department of Biochemistry and Gene Center, Ludwig-Maximilians-University, Munich, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Melanoma differentiation associated protein-5
A
243Sus scrofaMutation(s): 0 
Gene Names: MDA5
Find proteins for A7LCX1 (Sus scrofa)
Go to UniProtKB:  A7LCX1
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Non-structural protein V
B
52Parainfluenza virus 5 (strain W3)Mutation(s): 0 
Gene Names: P/V
Find proteins for P11207 (Parainfluenza virus 5 (strain W3))
Go to UniProtKB:  P11207
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download SDF File 
Download CCD File 
B
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.293 Å
  • R-Value Free: 0.230 
  • R-Value Work: 0.179 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 51.070α = 90.00
b = 52.490β = 90.00
c = 120.790γ = 90.00
Software Package:
Software NamePurpose
DNAdata collection
XDSdata reduction
XSCALEdata scaling
PHENIXrefinement
SHARPphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-01-30
    Type: Initial release
  • Version 1.1: 2013-02-20
    Type: Database references
  • Version 1.2: 2017-07-26
    Type: Advisory, Refinement description, Source and taxonomy