2BT9

Lectin from Ralstonia solanacearum complexed with Me-fucoside


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 0.94 Å
  • R-Value Free: 0.120 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The Fucose-Binding Lectin from Ralstonia Solanacearum: A New Type of Beta-Propeller Architecture Formed by Oligomerization and Interacting with Fucoside, Fucosyllactose, and Plant Xyloglucan.

Kostlanova, N.Mitchell, E.P.Lortat-Jacob, H.Oscarson, S.Lahmann, M.Gilboa-Garber, N.Chambat, G.Wimmerova, M.Imberty, A.

(2005) J.Biol.Chem. 280: 27839

  • DOI: 10.1074/jbc.M505184200
  • Primary Citation of Related Structures:  2BS5, 2BS6

  • PubMed Abstract: 
  • Plant pathogens, like animal ones, use protein-carbohydrate interactions in their strategy for host recognition, attachment, and invasion. The bacterium Ralstonia solanacearum, which is distributed worldwide and causes lethal wilt in many agricultura ...

    Plant pathogens, like animal ones, use protein-carbohydrate interactions in their strategy for host recognition, attachment, and invasion. The bacterium Ralstonia solanacearum, which is distributed worldwide and causes lethal wilt in many agricultural crops, was shown to produce a potent L-fucose-binding lectin, R. solanacearum lectin, a small protein of 90 amino acids with a tandem repeat in its amino acid sequence. In the present study, surface plasmon resonance experiments conducted on a series of oligosaccharides show a preference for binding to alphaFuc1-2Gal and alphaFuc1-6Gal epitopes. Titration microcalorimetry demonstrates the presence of two binding sites per monomer and an unusually high affinity of the lectin for alphaFuc1-2Gal-containing oligosaccharides (KD = 2.5 x 10(-7) M for 2-fucosyllactose). R. solanacearum lectin has been crystallized with a methyl derivative of fucose and with the highest affinity ligand, 2-fucosyllactose. X-ray crystal structures, the one with alpha-methyl-fucoside being at ultrahigh resolution, reveal that each monomer consists of two small four-stranded anti-parallel beta-sheets. Trimerization through a 3-fold or pseudo-3-fold axis generates a six-bladed beta-propeller architecture, very similar to that previously described for the fungal lectin of Aleuria aurantia. This is the first report of a beta-propeller formed by oligomerization and not by sequential domains. Each monomer presents two fucose binding sites, resulting in six symmetrically arranged sugar binding sites for the beta-propeller. Crystals were also obtained for a mutated lectin complexed with a fragment of xyloglucan, a fucosylated polysaccharide from the primary cell wall of plants, which may be the biological target of the lectin.


    Organizational Affiliation

    National Centre for Biomolecular Research and Department of Biochemistry, Masaryk University, Brno 611 37, Czech Republic.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
LECTIN
A, B, C
90Ralstonia solanacearum (strain GMI1000)Gene Names: rsl
Find proteins for Q8XXK6 (Ralstonia solanacearum (strain GMI1000))
Go to UniProtKB:  Q8XXK6
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MFU
Query on MFU

Download SDF File 
Download CCD File 
A, B, C
ALPHA-L-METHYL-FUCOSE
C7 H14 O5
OHWCAVRRXKJCRB-CXNFULCWSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
MFUKd: 640 nM BINDINGMOAD
MFUKd: 640 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 0.94 Å
  • R-Value Free: 0.120 
  • Space Group: P 31
Unit Cell:
Length (Å)Angle (°)
a = 43.985α = 90.00
b = 43.985β = 90.00
c = 103.076γ = 120.00
Software Package:
Software NamePurpose
SHELXL-97refinement
SCALAdata scaling
MOSFLMdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2005-06-02
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance