4YN2

THE ATOMIC STRUCTURE OF WISEANA SPP ENTOMOPOXVIRUS (WSEPV) FUSOLIN SPINDLES


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.02 Å
  • R-Value Free: 0.199 
  • R-Value Work: 0.166 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural basis for the enhancement of virulence by viral spindles and their in vivo crystallization.

Chiu, E.Hijnen, M.Bunker, R.D.Boudes, M.Rajendran, C.Aizel, K.Olieric, V.Schulze-Briese, C.Mitsuhashi, W.Young, V.Ward, V.K.Bergoin, M.Metcalf, P.Coulibaly, F.

(2015) Proc.Natl.Acad.Sci.USA 112: 3973-3978

  • DOI: 10.1073/pnas.1418798112
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The great benefits that chemical pesticides have brought to agriculture are partly offset by widespread environmental damage to nontarget species and threats to human health. Microbial bioinsecticides are considered safe and highly specific alternati ...

    The great benefits that chemical pesticides have brought to agriculture are partly offset by widespread environmental damage to nontarget species and threats to human health. Microbial bioinsecticides are considered safe and highly specific alternatives but generally lack potency. Spindles produced by insect poxviruses are crystals of the fusolin protein that considerably boost not only the virulence of these viruses but also, in cofeeding experiments, the insecticidal activity of unrelated pathogens. However, the mechanisms by which spindles assemble into ultra-stable crystals and enhance virulence are unknown. Here we describe the structure of viral spindles determined by X-ray microcrystallography from in vivo crystals purified from infected insects. We found that a C-terminal molecular arm of fusolin mediates the assembly of a globular domain, which has the hallmarks of lytic polysaccharide monooxygenases of chitinovorous bacteria. Explaining their unique stability, a 3D network of disulfide bonds between fusolin dimers covalently crosslinks the entire crystalline matrix of spindles. However, upon ingestion by a new host, removal of the molecular arm abolishes this stabilizing network leading to the dissolution of spindles. The released monooxygenase domain is then free to disrupt the chitin-rich peritrophic matrix that protects insects against oral infections. The mode of action revealed here may guide the design of potent spindles as synergetic additives to bioinsecticides.


    Organizational Affiliation

    School of Biological Sciences, University of Auckland, Auckland, 1010, New Zealand;




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
FUSOLIN
A
313unidentified entomopoxvirusMutation(s): 0 
Find proteins for A0A0J9X287 (unidentified entomopoxvirus)
Go to UniProtKB:  A0A0J9X287
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download SDF File 
Download CCD File 
A
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
EDO
Query on EDO

Download SDF File 
Download CCD File 
A
1,2-ETHANEDIOL
ETHYLENE GLYCOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 Ligand Interaction
BMA
Query on BMA

Download SDF File 
Download CCD File 
A
BETA-D-MANNOSE
C6 H12 O6
WQZGKKKJIJFFOK-RWOPYEJCSA-N
 Ligand Interaction
NAG
Query on NAG

Download SDF File 
Download CCD File 
A
N-ACETYL-D-GLUCOSAMINE
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.02 Å
  • R-Value Free: 0.199 
  • R-Value Work: 0.166 
  • Space Group: P 41 21 2
Unit Cell:
Length (Å)Angle (°)
a = 68.182α = 90.00
b = 68.182β = 90.00
c = 128.058γ = 90.00
Software Package:
Software NamePurpose
DENZOdata reduction
ARPmodel building
SCALEPACKdata scaling
Cootmodel building
PHASERphasing
BUSTERrefinement
SHARPphasing
SHELXDEphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2015-04-08
    Type: Initial release
  • Version 1.1: 2015-04-15
    Type: Database references
  • Version 1.2: 2017-11-22
    Type: Database references, Derived calculations, Refinement description, Source and taxonomy