1QNW

lectin II from Ulex europaeus


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.35 Å
  • R-Value Free: 0.218 
  • R-Value Work: 0.178 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural Basis of Carbohydrate Recognition by Lectin II from Ulex Europaeus, a Protein with a Promiscuous Carbohydrate Binding Site

Loris, R.De Greve, H.Dao-Thi, M.-H.Messens, J.Imberty, A.Wyns, L.

(2000) J.Mol.Biol. 301: 987

  • DOI: 10.1006/jmbi.2000.4016
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Protein-carbohydrate interactions are the language of choice for inter- cellular communication. The legume lectins form a large family of homologous proteins that exhibit a wide variety of carbohydrate specificities. The legume lectin family is there ...

    Protein-carbohydrate interactions are the language of choice for inter- cellular communication. The legume lectins form a large family of homologous proteins that exhibit a wide variety of carbohydrate specificities. The legume lectin family is therefore highly suitable as a model system to study the structural principles of protein-carbohydrate recognition. Until now, structural data are only available for two specificity families: Man/Glc and Gal/GalNAc. No structural data are available for any of the fucose or chitobiose specific lectins. The crystal structure of Ulex europaeus (UEA-II) is the first of a legume lectin belonging to the chitobiose specificity group. The complexes with N-acetylglucosamine, galactose and fucosylgalactose show a promiscuous primary binding site capable of accommodating both N-acetylglucos amine or galactose in the primary binding site. The hydrogen bonding network in these complexes can be considered suboptimal, in agreement with the low affinities of these sugars. In the complexes with chitobiose, lactose and fucosyllactose this suboptimal hydrogen bonding network is compensated by extensive hydrophobic interactions in a Glc/GlcNAc binding subsite. UEA-II thus forms the first example of a legume lectin with a promiscuous binding site and illustrates the importance of hydrophobic interactions in protein-carbohydrate complexes. Together with other known legume lectin crystal structures, it shows how different specificities can be grafted upon a conserved structural framework.


    Related Citations: 
    • Novel Structures of Plant Lectins and Their Complexes with Carbohydrates
      Bouckaert, J.,Hamelryck, T.W.,Wyns, L.,Loris, R.,Hamelryck, T.W.
      (1999) Curr.Opin.Struct.Biol. 9: 572
    • Legume Lectin Structure
      Loris, R.,Hamelryck, T.W.,Bouckaert, J.,Wyns, L.
      (1998) Biochim.Biophys.Acta 1383: 9
    • The Quaternary Structure of Uea-II, the Chitobiose Specific Lectin from Gorse
      Dao-Thi, M.-H.,Rizkallah, P.,Wyns, L.,Poortmans, F.,Loris, R.
      (1998) Acta Crystallogr.,Sect.D 54: 844


    Organizational Affiliation

    Laboratorium voor Ultrastruktuur, Vlaams Interuniversitair Instituut voor Biotechnologie, Vrije Universiteit Brussel, Paardenstraat 65, Sint-Genesius-Rode, B-1640, Belgium. reloris@vub.ac.be




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
CHITIN BINDING LECTIN, UEA-II
A, B, C, D
242Ulex europaeusMutation(s): 0 
Find proteins for P22973 (Ulex europaeus)
Go to UniProtKB:  P22973
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MN
Query on MN

Download SDF File 
Download CCD File 
A, B, C, D
MANGANESE (II) ION
Mn
WAEMQWOKJMHJLA-UHFFFAOYSA-N
 Ligand Interaction
CA
Query on CA

Download SDF File 
Download CCD File 
A, B, C, D
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
NAG
Query on NAG

Download SDF File 
Download CCD File 
A, B, C, D
N-ACETYL-D-GLUCOSAMINE
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.35 Å
  • R-Value Free: 0.218 
  • R-Value Work: 0.178 
  • Space Group: P 32 2 1
Unit Cell:
Length (Å)Angle (°)
a = 104.910α = 90.00
b = 104.910β = 90.00
c = 175.450γ = 120.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
X-PLORphasing
X-PLORrefinement
DENZOdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1999-11-23
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance