High-Resolution crystal structure of Erythrina cristagalli lectin in complex with lactose

Experimental Data Snapshot

  • Resolution: 1.58 Å
  • R-Value Free: 0.226 
  • R-Value Work: 0.208 
  • R-Value Observed: 0.208 

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High-Resolution Crystal Structures of Erythrina Cristagalli Lectin in Complex with Lactose and 2'-Alpha-L-Fucosyllactose and Correlation with Thermodynamic Binding Data

Svensson, C.Teneberg, S.Nilsson, C.Kjellberg, A.Schwarz, F.Sharon, N.Krengel, U.

(2002) J Mol Biol 321: 69

  • DOI: https://doi.org/10.1016/s0022-2836(02)00554-5
  • Primary Citation of Related Structures:  
    1GZ9, 1GZC

  • PubMed Abstract: 

    The primary sequence of Erythrina cristagalli lectin (ECL) was mapped by mass spectrometry, and the crystal structures of the lectin in complex with lactose and 2'-alpha-L-fucosyllactose were determined at 1.6A and 1.7A resolution, respectively. The two complexes were compared with the crystal structure of the closely related Erythrina corallodendron lectin (ECorL) in complex with lactose, with the crystal structure of the Ulex europaeus lectin II in complex with 2'-alpha-L-fucosyllactose, and with two modeled complexes of ECorL with 2'-alpha-L-fucosyl-N-acetyllactosamine. The molecular models are very similar to the crystal structure of ECL in complex with 2'-alpha-L-fucosyllactose with respect to the overall mode of binding, with the L-fucose fitting snugly into the cavity surrounded by Tyr106, Tyr108, Trp135 and Pro134 adjoining the primary combining site of the lectin. Marked differences were however noted between the models and the experimental structure in the network of hydrogen bonds and hydrophobic interactions holding the L-fucose in the combining site of the lectin, pointing to limitations of the modeling approach. In addition to the structural characterization of the ECL complexes, an effort was undertaken to correlate the structural data with thermodynamic data obtained from microcalorimetry, revealing the importance of the water network in the lectin combining site for carbohydrate binding.

  • Organizational Affiliation

    Department of Molecular Biotechnology and Center for Structural Biology, Chalmers University of Technology, P. O. Box 462, SE-405-30 Goteborg, Sweden.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
ERYTHRINA CRISTA-GALLI LECTIN239Erythrina crista-galliMutation(s): 0 
Find proteins for P83410 (Erythrina crista-galli)
Explore P83410 
Go to UniProtKB:  P83410
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP83410
Sequence Annotations
  • Reference Sequence


Entity ID: 2
MoleculeChains Length2D Diagram Glycosylation3D Interactions
Glycosylation Resources
GlyTouCan:  G84224TW
GlyCosmos:  G84224TW
GlyGen:  G84224TW
Small Molecules
Biologically Interesting Molecules (External Reference) 1 Unique
Experimental Data & Validation

Experimental Data

  • Resolution: 1.58 Å
  • R-Value Free: 0.226 
  • R-Value Work: 0.208 
  • R-Value Observed: 0.208 
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 81.8α = 90
b = 81.8β = 90
c = 126.1γ = 90
Software Package:
Software NamePurpose
XDSdata reduction
XSCALEdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2002-06-21
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2018-01-17
    Changes: Data collection
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Atomic model, Data collection, Derived calculations, Non-polymer description, Other, Structure summary