Crystal structure of peroxiredoxin Asp f3

Experimental Data Snapshot

  • Resolution: 2.10 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.183 
  • R-Value Observed: 0.186 

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The Crystal Structure of Peroxiredoxin Asp f3 Provides Mechanistic Insight into Oxidative Stress Resistance and Virulence of Aspergillus fumigatus.

Hillmann, F.Bagramyan, K.Straburger, M.Heinekamp, T.Hong, T.B.Bzymek, K.P.Williams, J.C.Brakhage, A.A.Kalkum, M.

(2016) Sci Rep 6: 33396-33396

  • DOI: https://doi.org/10.1038/srep33396
  • Primary Citation of Related Structures:  
    5J9B, 5J9C

  • PubMed Abstract: 

    Invasive aspergillosis and other fungal infections occur in immunocompromised individuals, including patients who received blood-building stem cell transplants, patients with chronic granulomatous disease (CGD), and others. Production of reactive oxygen species (ROS) by immune cells, which incidentally is defective in CGD patients, is considered to be a fundamental process in inflammation and antifungal immune response. Here we show that the peroxiredoxin Asp f3 of Aspergillus fumigatus inactivates ROS. We report the crystal structure and the catalytic mechanism of Asp f3, a two-cysteine type peroxiredoxin. The latter exhibits a thioredoxin fold and a homodimeric structure with two intermolecular disulfide bonds in its oxidized state. Replacement of the Asp f3 cysteines with serine residues retained its dimeric structure, but diminished Asp f3's peroxidase activity, and extended the alpha-helix with the former peroxidatic cysteine residue C61 by six residues. The asp f3 deletion mutant was sensitive to ROS, and this phenotype was rescued by ectopic expression of Asp f3. Furthermore, we showed that deletion of asp f3 rendered A. fumigatus avirulent in a mouse model of pulmonary aspergillosis. The conserved expression of Asp f3 homologs in medically relevant molds and yeasts prompts future evaluation of Asp f3 as a potential therapeutic target.

  • Organizational Affiliation

    Transfer Group Anti-infectives, Leibniz Institute for Natural Product Research and Infection Biology - Hans-Knöll-Institut, Beutenbergstrasse 11a, D-07745 Jena, Germany.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
peroxiredoxin Asp f3
A, B
175Aspergillus fumigatus Af293Mutation(s): 0 
Gene Names: pmp20AFUA_6G02280aspf3
EC: (PDB Primary Data), (UniProt)
Find proteins for O43099 (Aspergillus fumigatus (strain ATCC MYA-4609 / CBS 101355 / FGSC A1100 / Af293))
Explore O43099 
Go to UniProtKB:  O43099
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO43099
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.10 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.183 
  • R-Value Observed: 0.186 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 52.98α = 90
b = 68.49β = 90
c = 89.45γ = 90
Software Package:
Software NamePurpose
XDSdata reduction
XSCALEdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2016-09-21
    Type: Initial release
  • Version 1.1: 2016-09-28
    Changes: Database references
  • Version 1.2: 2016-10-05
    Changes: Database references
  • Version 1.3: 2023-09-27
    Changes: Data collection, Database references, Derived calculations, Refinement description