2BS5

LECTIN FROM RALSTONIA SOLANACEARUM COMPLEXED WITH 2-FUCOSYLLACTOSE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.253 
  • R-Value Work: 0.183 
  • R-Value Observed: 0.186 

Starting Model: other
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wwPDB Validation   3D Report Full Report


This is version 2.1 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: https://doi.org/10.1074/jbc.M505184200
  • Primary Citation of Related Structures:  
    2BS5, 2BS6, 2BT9

  • 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 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:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
FUCOSE-BINDING LECTIN PROTEIN90Ralstonia solanacearumMutation(s): 0 
UniProt
Find proteins for A0A0S4TLR1 (Ralstonia solanacearum)
Explore A0A0S4TLR1 
Go to UniProtKB:  A0A0S4TLR1
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA0A0S4TLR1
Sequence Annotations
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  • Reference Sequence
Oligosaccharides

Help

Entity ID: 2
MoleculeChains Length2D Diagram Glycosylation3D Interactions
alpha-L-fucopyranose-(1-2)-beta-D-galactopyranose-(1-4)-beta-D-glucopyranose
B, C
3N/A
Glycosylation Resources
GlyTouCan:  G61399NC
GlyCosmos:  G61399NC
GlyGen:  G61399NC
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
CL
Query on CL

Download Ideal Coordinates CCD File 
D [auth A]CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
Biologically Interesting Molecules (External Reference) 1 Unique
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.253 
  • R-Value Work: 0.183 
  • R-Value Observed: 0.186 
  • Space Group: H 3 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 76.824α = 90
b = 76.824β = 90
c = 101.519γ = 120
Software Package:
Software NamePurpose
REFMACrefinement
MOSFLMdata reduction
SCALAdata scaling
MOLREPphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2005-05-19
    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: 2019-05-08
    Changes: Data collection, Experimental preparation, Other
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Atomic model, Data collection, Derived calculations, Other, Structure summary
  • Version 2.1: 2024-05-01
    Changes: Data collection, Database references, Derived calculations, Refinement description, Structure summary