Siderophore hydrolase EstB mutant S148A from Aspergillus fumigatus

Experimental Data Snapshot

  • Resolution: 1.45 Å
  • R-Value Free: 0.185 
  • R-Value Work: 0.166 
  • R-Value Observed: 0.167 

wwPDB Validation   3D Report Full Report

This is version 1.2 of the entry. See complete history


Iron Scavenging in Aspergillus Species: Structural and Biochemical Insights into Fungal Siderophore Esterases.

Ecker, F.Haas, H.Groll, M.Huber, E.M.

(2018) Angew Chem Int Ed Engl 57: 14624-14629

  • DOI: https://doi.org/10.1002/anie.201807093
  • Primary Citation of Related Structures:  
    6GUD, 6GUG, 6GUI, 6GUL, 6GUN, 6GUO, 6GUP, 6GUR

  • PubMed Abstract: 

    Fungi utilize high-affinity chelators termed siderophores with chemically diverse structures to scavenge the essential nutrient iron from their surroundings. Since they are among the strongest known Fe 3+ binding agents, intracellular release of the heavy metal atom is facilitated by the activity of specific hydrolases. In this work, we report the characterization and X-ray crystal structures of four siderophore esterases: AfEstB and AfSidJ from Aspergillus fumigatus, as well as AnEstB and AnEstA from Aspergillus nidulans. Even though they all display the conserved α/β-hydrolase fold, we found significant structural and enzymatic discrepancies in their adaption to both related and chemically diverse substrates. A structure of AfEstB in complex with its substrate triacetylfusarinine C gives insight into the active enzyme and shows tetrahedral coordination between the catalytic serine and the scissile ester bond.

  • Organizational Affiliation

    Center for Integrated Protein Science Munich (CIPSM), Department of Chemistry, Technische Universität München, Lichtenbergstraße 4, 85748, Garching, Germany.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Siderophore esterase IroE-like, putative
A, B
292Aspergillus fumigatus Af293Mutation(s): 1 
Gene Names: AFUA_3G03660
Find proteins for Q4WF29 (Aspergillus fumigatus (strain ATCC MYA-4609 / CBS 101355 / FGSC A1100 / Af293))
Explore Q4WF29 
Go to UniProtKB:  Q4WF29
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ4WF29
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.45 Å
  • R-Value Free: 0.185 
  • R-Value Work: 0.166 
  • R-Value Observed: 0.167 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 54.79α = 90
b = 92.36β = 90
c = 130.84γ = 90
Software Package:
Software NamePurpose
XDSdata reduction
XSCALEdata scaling

Structure Validation

View Full Validation Report

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
German Research FoundationGermanyGR 1861/8-1
Austrian Science FundAustriaFWF I 1346-B21

Revision History  (Full details and data files)

  • Version 1.0: 2018-08-15
    Type: Initial release
  • Version 1.1: 2018-10-31
    Changes: Data collection, Database references
  • Version 1.2: 2024-01-17
    Changes: Data collection, Database references, Refinement description