Structure of apo Boletus edulis lectin

Experimental Data Snapshot

  • Resolution: 1.15 Å
  • R-Value Free: 0.187 
  • R-Value Work: 0.174 
  • R-Value Observed: 0.174 

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This is version 1.3 of the entry. See complete history


Structure of a lectin with antitumoral properties in king bolete (Boletus edulis) mushrooms.

Bovi, M.Carrizo, M.E.Capaldi, S.Perduca, M.Chiarelli, L.R.Galliano, M.Monaco, H.L.

(2011) Glycobiology 21: 1000-1009

  • DOI: https://doi.org/10.1093/glycob/cwr012
  • Primary Citation of Related Structures:  
    3QDS, 3QDT, 3QDU, 3QDV, 3QDW, 3QDX, 3QDY

  • PubMed Abstract: 

    A novel lectin has been isolated from the fruiting bodies of the common edible mushroom Boletus edulis (king bolete, penny bun, porcino or cep) by affinity chromatography on a chitin column. We propose for the lectin the name BEL (B. edulis lectin). BEL inhibits selectively the proliferation of several malignant cell lines and binds the neoplastic cell-specific T-antigen disaccharide, Galβ1-3GalNAc. The lectin was structurally characterized: the molecule is a homotetramer and the 142-amino acid sequence of the chains was determined. The protein belongs to the saline-soluble family of mushroom fruiting body-specific lectins. BEL was also crystallized and its three-dimensional structure was determined by X-ray diffraction to 1.15 Å resolution. The structure is similar to that of Agaricus bisporus lectin. Using the appropriate co-crystals, the interactions of BEL with specific mono- and disaccharides were also studied by X-ray diffraction. The six structures of carbohydrate complexes reported here provide details of the interactions of the ligands with the lectin and shed light on the selectivity of the two distinct binding sites present in each protomer.

  • Organizational Affiliation

    Biocrystallography Laboratory, Department of Biotechnology, University of Verona, Ca Vignal 1, strada Le Grazie 15, 37134 Verona, Italy.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
A, B
143Boletus edulisMutation(s): 0 
Find proteins for F2Z266 (Boletus edulis)
Explore F2Z266 
Go to UniProtKB:  F2Z266
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupF2Z266
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.15 Å
  • R-Value Free: 0.187 
  • R-Value Work: 0.174 
  • R-Value Observed: 0.174 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 68.047α = 90
b = 97.443β = 90
c = 84.366γ = 90
Software Package:
Software NamePurpose
ADSCdata collection
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2011-02-23
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2011-11-02
    Changes: Database references
  • Version 1.3: 2023-09-13
    Changes: Data collection, Database references, Derived calculations, Refinement description