4YN1

THE ATOMIC STRUCTURE OF ANOMALA CUPREA ENTOMOPOXVIRUS (ACEPV) FUSOLIN SPINDLES


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.197 
  • R-Value Work: 0.167 
  • R-Value Observed: 0.168 

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 U S A 112: 3973-3978

  • DOI: 10.1073/pnas.1418798112
  • Structures With Same Primary Citation

  • 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

    Department of Biochemistry and Molecular Biology, School of Biomedical Sciences, Monash University, Clayton, VIC 3800, Australia; fasseli.coulibaly@monash.edu peter.metcalf@auckland.ac.nz.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Fusolin
A
357Anomala cuprea entomopoxvirusMutation(s): 0 
Find proteins for O70709 (Anomala cuprea entomopoxvirus)
Go to UniProtKB:  O70709
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NAG
Query on NAG

Download CCD File 
A
N-ACETYL-D-GLUCOSAMINE
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
BMA
Query on BMA

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

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

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.197 
  • R-Value Work: 0.167 
  • R-Value Observed: 0.168 
  • Space Group: P 41 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 71.887α = 90
b = 71.887β = 90
c = 127.996γ = 90
Software Package:
Software NamePurpose
BUSTERrefinement
DENZOdata reduction
SCALEPACKdata scaling
PHASERphasing
SHELXDEphasing
ARPmodel building
Cootmodel building
SHARPphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

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