The crystal structure of Erwinia tasmaniensis levansucrase in complex with (S)-1,2,4-butanentriol

Experimental Data Snapshot

  • Resolution: 1.40 Å
  • R-Value Free: 0.164 
  • R-Value Work: 0.133 
  • R-Value Observed: 0.134 

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Erwinia tasmaniensis levansucrase shows enantiomer selection for (S)-1,2,4-butanetriol.

Polsinelli, I.Salomone-Stagni, M.Benini, S.

(2022) Acta Crystallogr F Struct Biol Commun 78: 289-296

  • DOI: https://doi.org/10.1107/S2053230X2200680X
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Levansucrases are biotechnologically interesting fructosyltransferases due to their potential use in the enzymatic or chemo-enzymatic synthesis of glycosides of non-natural substrates relevant to pharmaceutical applications. The structure of Erwinia tasmaniensis levansucrase in complex with (S)-1,2,4-butanetriol and its biochemical characterization suggests the possible application of short aliphatic moieties containing polyols with defined stereocentres in fructosylation biotechnology. The structural information revealed that (S)-1,2,4-butanetriol mimics the natural substrate. The preference of the protein towards a specific 1,2,4-butanetriol enantiomer was assessed using microscale thermophoresis binding assays. Furthermore, the results obtained and the structural comparison of levansucrases and inulosucrases suggest that the fructose binding modes could differ in fructosyltransferases from Gram-positive and Gram-negative bacteria.

  • Organizational Affiliation

    Bioorganic Chemistry and Bio-Crystallography Laboratory (B2Cl), Faculty of Science and Technology, Free University of Bolzano, Piazza Universita 5, 39100 Bolzano, Italy.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Levansucrase (Beta-D-fructofuranosyl transferase)412Erwinia tasmaniensis Et1/99Mutation(s): 0 
Gene Names: lscETA_34670
Find proteins for B2VCC3 (Erwinia tasmaniensis (strain DSM 17950 / CFBP 7177 / CIP 109463 / NCPPB 4357 / Et1/99))
Explore B2VCC3 
Go to UniProtKB:  B2VCC3
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupB2VCC3
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.40 Å
  • R-Value Free: 0.164 
  • R-Value Work: 0.133 
  • R-Value Observed: 0.134 
  • Space Group: P 41 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 127.713α = 90
b = 127.713β = 90
c = 61.016γ = 90
Software Package:
Software NamePurpose
XDSdata reduction
XSCALEdata scaling
PDB_EXTRACTdata extraction

Structure Validation

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Ligand Structure Quality Assessment 

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2022-06-22
    Type: Initial release
  • Version 1.1: 2023-07-05
    Changes: Database references
  • Version 1.2: 2024-02-07
    Changes: Data collection, Refinement description