4FXQ

Full-length Certhrax toxin from Bacillus cereus in complex with Inhibitor P6


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9599 Å
  • R-Value Free: 0.227 
  • R-Value Work: 0.187 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Certhrax Toxin, an Anthrax-related ADP-ribosyltransferase from Bacillus cereus.

Visschedyk, D.Rochon, A.Tempel, W.Dimov, S.Park, H.W.Merrill, A.R.

(2012) J.Biol.Chem. 287: 41089-41102

  • DOI: 10.1074/jbc.M112.412809
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • We identified Certhrax, the first anthrax-like mART toxin from the pathogenic G9241 strain of Bacillus cereus. Certhrax shares 31% sequence identity with anthrax lethal factor from Bacillus anthracis; however, we have shown that the toxicity of Certh ...

    We identified Certhrax, the first anthrax-like mART toxin from the pathogenic G9241 strain of Bacillus cereus. Certhrax shares 31% sequence identity with anthrax lethal factor from Bacillus anthracis; however, we have shown that the toxicity of Certhrax resides in the mART domain, whereas anthrax uses a metalloprotease mechanism. Like anthrax lethal factor, Certhrax was found to require protective antigen for host cell entry. This two-domain enzyme was shown to be 60-fold more toxic to mammalian cells than anthrax lethal factor. Certhrax localizes to distinct regions within mouse RAW264.7 cells by 10 min postinfection and is extranuclear in its cellular location. Substitution of catalytic residues shows that the mART function is responsible for the toxicity, and it binds NAD(+) with high affinity (K(D) = 52.3 ± 12.2 μM). We report the 2.2 Å Certhrax structure, highlighting its structural similarities and differences with anthrax lethal factor. We also determined the crystal structures of two good inhibitors (P6 (K(D) = 1.7 ± 0.2 μM, K(i) = 1.8 ± 0.4 μM) and PJ34 (K(D) = 5.8 ± 2.6 μM, K(i) = 9.6 ± 0.3 μM)) in complex with Certhrax. As with other toxins in this family, the phosphate-nicotinamide loop moves toward the NAD(+) binding site with bound inhibitor. These results indicate that Certhrax may be important in the pathogenesis of B. cereus.


    Organizational Affiliation

    Department of Molecular and Cellular Biology, University of Guelph, Guelph, Ontario N1G 2W1, Canada.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Putative ADP-ribosyltransferase Certhrax
A, B
460Bacillus cereusMutation(s): 0 
EC: 2.4.2.-
Find proteins for Q4MV79 (Bacillus cereus)
Go to UniProtKB:  Q4MV79
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
G9L
Query on G9L

Download SDF File 
Download CCD File 
A, B
8-fluoro-2-(3-piperidin-1-ylpropanoyl)-1,3,4,5-tetrahydrobenzo[c][1,6]naphthyridin-6(2H)-one
C20 H24 F N3 O2
CTOQXIXQHAILCA-UHFFFAOYSA-N
 Ligand Interaction
NA
Query on NA

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Download CCD File 
A, B
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
 Ligand Interaction
CL
Query on CL

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Download CCD File 
A, B
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
G9LKd: 1700 nM BINDINGMOAD
G9LKd: 1700 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9599 Å
  • R-Value Free: 0.227 
  • R-Value Work: 0.187 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 61.310α = 90.00
b = 100.290β = 90.00
c = 191.090γ = 90.00
Software Package:
Software NamePurpose
SCALAdata scaling
MxDCdata collection
BESTdata reduction
pointlessdata scaling
PHASERphasing
XDSdata reduction
PHENIXphasing
PHENIXrefinement
AutoProcessdata reduction
HKL-2000data reduction
iMOSFLMdata reduction
PHENIXmodel building

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-09-26
    Type: Initial release
  • Version 1.1: 2012-10-03
    Type: Database references
  • Version 1.2: 2012-12-19
    Type: Database references