Siderophore hydrolase EstB from Aspergillus nidulans

Experimental Data Snapshot

  • Resolution: 2.00 Å
  • R-Value Free: 0.234 
  • R-Value Work: 0.195 
  • R-Value Observed: 0.197 

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
EstB from Aspergillus nidulans
A, B, C, D
308Aspergillus nidulans FGSC A4Mutation(s): 0 
Find proteins for A0A3F2YM31 (Emericella nidulans (strain FGSC A4 / ATCC 38163 / CBS 112.46 / NRRL 194 / M139))
Explore A0A3F2YM31 
Go to UniProtKB:  A0A3F2YM31
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA0A3F2YM31
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.00 Å
  • R-Value Free: 0.234 
  • R-Value Work: 0.195 
  • R-Value Observed: 0.197 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 87.46α = 90
b = 72.05β = 111.97
c = 108.1γ = 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