Aspergillus kawachii beta-fructofuranosidase

Experimental Data Snapshot

  • Resolution: 2.30 Å
  • R-Value Free: 0.219 
  • R-Value Work: 0.189 
  • R-Value Observed: 0.190 

wwPDB Validation   3D Report Full Report

This is version 1.3 of the entry. See complete history


Crystal structure of a beta-fructofuranosidase with high transfructosylation activity from Aspergillus kawachii

Nagaya, M.Kimura, M.Gozu, Y.Sato, S.Hirano, K.Tochio, T.Nishikawa, A.Tonozuka, T.

(2017) Biosci Biotechnol Biochem 81: 1786-1795

  • DOI: https://doi.org/10.1080/09168451.2017.1353405
  • Primary Citation of Related Structures:  
    5XH8, 5XH9, 5XHA

  • PubMed Abstract: 

    β-Fructofuranosidases belonging to glycoside hydrolase family (GH) 32 are enzymes that hydrolyze sucrose. Some GH32 enzymes also catalyze transfructosylation to produce fructooligosaccharides. We found that Aspergillus kawachii IFO 4308 β-fructofuranosidase (AkFFase) produces fructooligosaccharides, mainly 1-kestose, from sucrose. We determined the crystal structure of AkFFase. AkFFase is composed of an N-terminal small component, a β-propeller catalytic domain, an α-helical linker, and a C-terminal β-sandwich, similar to other GH32 enzymes. AkFFase forms a dimer, and the dimerization pattern is different from those of other oligomeric GH32 enzymes. The complex structure of AkFFase with fructose unexpectedly showed that fructose binds both subsites -1 and +1, despite the fact that the catalytic residues were not mutated. Fructose at subsite +1 interacts with Ile146 and Glu296 of AkFFase via direct hydrogen bonds.

  • Organizational Affiliation

    a Department of Applied Biological Science , Tokyo University of Agriculture and Technology , Fuchu , Japan.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Extracellular invertase605Aspergillus luchuensis IFO 4308Mutation(s): 0 
Gene Names: AKAW_06215
Find proteins for G7XM46 (Aspergillus kawachii (strain NBRC 4308))
Explore G7XM46 
Go to UniProtKB:  G7XM46
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupG7XM46
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on NA

Download Ideal Coordinates CCD File 
Experimental Data & Validation

Experimental Data

  • Resolution: 2.30 Å
  • R-Value Free: 0.219 
  • R-Value Work: 0.189 
  • R-Value Observed: 0.190 
  • Space Group: P 31 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 108.786α = 90
b = 108.786β = 90
c = 153.196γ = 120
Software Package:
Software NamePurpose
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2017-07-19
    Type: Initial release
  • Version 1.1: 2017-08-02
    Changes: Database references
  • Version 1.2: 2017-08-16
    Changes: Database references
  • Version 1.3: 2023-11-22
    Changes: Data collection, Database references, Derived calculations, Refinement description