5X9K

Structure of AusH from Aspergillus nidulans


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.250 
  • R-Value Work: 0.196 
  • R-Value Observed: 0.200 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Molecular basis for the unusual ring reconstruction in fungal meroterpenoid biogenesis

Mori, T.Iwabuchi, T.Hoshino, S.Wang, H.Matsuda, Y.Abe, I.

(2017) Nat Chem Biol 13: 1066-1073

  • DOI: https://doi.org/10.1038/nchembio.2443
  • Primary Citation of Related Structures:  
    5WQF, 5WQG, 5WQH, 5WQI, 5X9J, 5X9K

  • PubMed Abstract: 

    Trt14 from Aspergillus terreus is involved in unusual skeletal reconstruction during the biosynthesis of the fungal meroterpenoid terretonin. Detailed in vitro characterization revealed that this novel multifunctional enzyme catalyzes not only the D-ring expansion via intramolecular methoxy rearrangement, but also the hydrolysis of the expanded D-ring. The X-ray crystal structures of Trt14, in complex with substrate or product, and two Trt14 homologs, AusH and PrhC from Aspergillus nidulans and Penicillium brasilianum, respectively, indicated similar overall structures to those of the NTF2-like superfamily of enzymes, despite lacking sequence and functional similarities. Moreover, we gained structural insight into the mechanism of the Trt14-catalyzed ring reconstruction from the in-crystal enzyme reaction and site-directed mutagenesis to show that this reaction involves sequential ester bond cleavage and formation. Structural comparison of Trt14 and its homologs suggests that the enzymes in this new superfamily employ similar acid-base chemistry to diversify the molecular architecture of fungal meroterpenoids.


  • Organizational Affiliation

    Graduate School of Pharmaceutical Sciences, The University of Tokyo, Bunkyo-ku, Tokyo, Japan.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Austinol synthesis protein H
A, B
168Aspergillus nidulans FGSC A4Mutation(s): 0 
Gene Names: ausHAN9249
UniProt
Find proteins for Q5AR31 (Emericella nidulans (strain FGSC A4 / ATCC 38163 / CBS 112.46 / NRRL 194 / M139))
Explore Q5AR31 
Go to UniProtKB:  Q5AR31
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ5AR31
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.250 
  • R-Value Work: 0.196 
  • R-Value Observed: 0.200 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 50.589α = 90
b = 37.423β = 107.45
c = 74.777γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
XDSdata scaling
PHASERphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2017-07-26
    Type: Initial release
  • Version 1.1: 2017-10-04
    Changes: Database references
  • Version 1.2: 2020-09-16
    Changes: Structure summary
  • Version 1.3: 2023-11-22
    Changes: Data collection, Database references, Refinement description