Crystal structure of alpha-1,3/4-fucosidase from Bifidobacterium longum subsp. infantis complexed with deoxyfuconojirimycin

Experimental Data Snapshot

  • Resolution: 1.60 Å
  • R-Value Free: 0.191 
  • R-Value Work: 0.160 
  • R-Value Observed: 0.161 

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1,3-1,4-alpha-L-fucosynthase that specifically introduces Lewis a/x antigens into type-1/2 chains

Sakurama, H.Fushinobu, S.Hidaka, M.Yoshida, E.Honda, Y.Ashida, H.Kitaoka, M.Kumagai, H.Yamamoto, K.Katayama, T.

(2012) J Biol Chem 287: 16709-16719

  • DOI: https://doi.org/10.1074/jbc.M111.333781
  • Primary Citation of Related Structures:  
    3UES, 3UET

  • PubMed Abstract: 

    α-L-fucosyl residues attached at the non-reducing ends of glycoconjugates constitute histo-blood group antigens Lewis (Le) and ABO and play fundamental roles in various biological processes. Therefore, establishing a method for synthesizing the antigens is important for functional glycomics studies. However, regiospecific synthesis of glycosyl linkages, especially α-L-fucosyl linkages, is quite difficult to control both by chemists and enzymologists. Here, we generated an α-L-fucosynthase that specifically introduces Le(a) and Le(x) antigens into the type-1 and type-2 chains, respectively; i.e. the enzyme specifically accepts the disaccharide structures (Galβ1-3/4GlcNAc) at the non-reducing ends and attaches a Fuc residue via an α-(1,4/3)-linkage to the GlcNAc. X-ray crystallographic studies revealed the structural basis of this strict regio- and acceptor specificity, which includes the induced fit movement of the catalytically important residues, and the difference between the active site structures of 1,3-1,4-α-L-fucosidase (EC and α-L-fucosidase (EC in glycoside hydrolase family 29. The glycosynthase developed in this study should serve as a potentially powerful tool to specifically introduce the Le(a/x) epitopes onto labile glycoconjugates including glycoproteins. Mining glycosidases with strict specificity may represent the most efficient route to the specific synthesis of glycosidic bonds.

  • Organizational Affiliation

    Research Institute for Bioresources and Biotechnology, Ishikawa Prefectural University, Nonoichi, Ishikawa 921-8836, Japan.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
A, B
478Bifidobacterium longum subsp. infantis ATCC 15697 = JCM 1222 = DSM 20088Mutation(s): 0 
Gene Names: BLIJ_2413Blon_2336
Find proteins for B7GNN8 (Bifidobacterium longum subsp. infantis (strain ATCC 15697 / DSM 20088 / JCM 1222 / NCTC 11817 / S12))
Explore B7GNN8 
Go to UniProtKB:  B7GNN8
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupB7GNN8
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.60 Å
  • R-Value Free: 0.191 
  • R-Value Work: 0.160 
  • R-Value Observed: 0.161 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 63.981α = 90
b = 120.597β = 90
c = 142.469γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2012-04-04
    Type: Initial release
  • Version 1.1: 2012-12-12
    Changes: Database references
  • Version 1.2: 2023-11-01
    Changes: Data collection, Database references, Derived calculations, Refinement description