4OW5

Structural basis for the enhancement of virulence by entomopoxvirus fusolin and its in vivo crystallization into viral spindles


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.203 
  • R-Value Work: 0.168 

wwPDB Validation 3D Report Full Report


This is version 1.3 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
370unidentified entomopoxvirusMutation(s): 0 
Find proteins for Q83389 (unidentified entomopoxvirus)
Go to UniProtKB:  Q83389
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
EDO
Query on EDO

Download SDF File 
Download CCD File 
A
1,2-ETHANEDIOL
ETHYLENE GLYCOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.203 
  • R-Value Work: 0.168 
  • Space Group: P 41 21 2
Unit Cell:
Length (Å)Angle (°)
a = 71.270α = 90.00
b = 71.270β = 90.00
c = 129.570γ = 90.00
Software Package:
Software NamePurpose
PDB_EXTRACTdata extraction
DENZOdata reduction
BUSTERrefinement
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Australian Research CouncilAustralia--

Revision History 

  • Version 1.0: 2015-03-18
    Type: Initial release
  • Version 1.1: 2015-04-01
    Type: Database references
  • Version 1.2: 2015-04-08
    Type: Database references
  • Version 1.3: 2017-09-27
    Type: Author supporting evidence, Database references, Derived calculations, Refinement description, Source and taxonomy