3UT2

Crystal Structure of Fungal MagKatG2


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.55 Å
  • R-Value Free: 0.220 
  • R-Value Work: 0.197 
  • R-Value Observed: 0.198 

wwPDB Validation   3D Report Full Report


This is version 1.4 of the entry. See complete history


Literature

High Conformational Stability of Secreted Eukaryotic Catalase-peroxidases: ANSWERS FROM FIRST CRYSTAL STRUCTURE AND UNFOLDING STUDIES.

Zamocky, M.Garcia-Fernandez, Q.Gasselhuber, B.Jakopitsch, C.Furtmuller, P.G.Loewen, P.C.Fita, I.Obinger, C.Carpena, X.

(2012) J Biol Chem 287: 32254-32262

  • DOI: 10.1074/jbc.M112.384271
  • Primary Citation of Related Structures:  
    3UT2

  • PubMed Abstract: 
  • Catalase-peroxidases (KatGs) are bifunctional heme enzymes widely spread in archaea, bacteria, and lower eukaryotes. Here we present the first crystal structure (1.55 Å resolution) of an eukaryotic KatG, the extracellular or secreted enzyme from the phytopathogenic fungus Magnaporthe grisea ...

    Catalase-peroxidases (KatGs) are bifunctional heme enzymes widely spread in archaea, bacteria, and lower eukaryotes. Here we present the first crystal structure (1.55 Å resolution) of an eukaryotic KatG, the extracellular or secreted enzyme from the phytopathogenic fungus Magnaporthe grisea. The heme cavity of the homodimeric enzyme is similar to prokaryotic KatGs including the unique distal (+)Met-Tyr-Trp adduct (where the Trp is further modified by peroxidation) and its associated mobile arginine. The structure also revealed several conspicuous peculiarities that are fully conserved in all secreted eukaryotic KatGs. Peculiarities include the wrapping at the dimer interface of the N-terminal elongations from the two subunits and cysteine residues that cross-link the two subunits. Differential scanning calorimetry and temperature- and urea-mediated unfolding followed by UV-visible, circular dichroism, and fluorescence spectroscopy combined with site-directed mutagenesis demonstrated that secreted eukaryotic KatGs have a significantly higher conformational stability as well as a different unfolding pattern when compared with intracellular eukaryotic and prokaryotic catalase-peroxidases. We discuss these properties with respect to the structure as well as the postulated roles of this metalloenzyme in host-pathogen interactions.


    Organizational Affiliation

    Department of Chemistry, Division of Biochemistry, BOKU, University of Natural Resources and Life Sciences, A-1190 Vienna, Austria.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Catalase-peroxidase 2A, B764Pyricularia oryzae 70-15Mutation(s): 0 
Gene Names: KATG2MagKatG2MGG_09834CPXB
EC: 1.11.1.21
Find proteins for A4QUT2 (Magnaporthe oryzae (strain 70-15 / ATCC MYA-4617 / FGSC 8958))
Explore A4QUT2 
Go to UniProtKB:  A4QUT2
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
HEM
Query on HEM

Download Ideal Coordinates CCD File 
C [auth A], D [auth B]PROTOPORPHYRIN IX CONTAINING FE
C34 H32 Fe N4 O4
KABFMIBPWCXCRK-RGGAHWMASA-L
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
TOX
Query on TOX
A, BL-PEPTIDE LINKINGC11 H12 N2 O4TRP
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.55 Å
  • R-Value Free: 0.220 
  • R-Value Work: 0.197 
  • R-Value Observed: 0.198 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 102.993α = 90
b = 109.606β = 90
c = 132.277γ = 90
Software Package:
Software NamePurpose
DNAdata collection
MOLREPphasing
REFMACrefinement
DENZOdata reduction
SCALAdata scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2012-07-25
    Type: Initial release
  • Version 1.1: 2012-09-05
    Changes: Database references
  • Version 1.2: 2012-10-03
    Changes: Database references
  • Version 1.3: 2013-05-08
    Changes: Non-polymer description
  • Version 1.4: 2018-01-24
    Changes: Structure summary