Ralstonia solanacearum lectin (RS-IIL) in complex with alpha-methylmannoside

Experimental Data Snapshot

  • Resolution: 1.70 Å
  • R-Value Free: 0.139 
  • R-Value Work: 0.116 
  • R-Value Observed: 0.118 

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This is version 1.4 of the entry. See complete history


A New Ralstonia Solanacearum High-Affinity Mannose-Binding Lectin Rs-Iil Structurally Resembling the Pseudomonas Aeruginosa Fucose-Specific Lectin Pa-Iil

Sudakevitz, D.Kostlanova, N.Blatman-Jan, G.Mitchell, E.P.Lerrer, B.Wimmerova, M.Katcoff, D.J.Imberty, A.Gilboa-Garber, N.

(2004) Mol Microbiol 52: 691

  • DOI: https://doi.org/10.1111/j.1365-2958.2004.04020.x
  • Primary Citation of Related Structures:  
    1UQX, 2CHH

  • PubMed Abstract: 

    The plant pathogen Ralstonia solanacearum produces two lectins, each with different affinity to fucose. We described previously the properties and sequence of the first lectin, RSL (subunit M(r) 9.9 kDa), which is related to fungal lectins (Sudakevitz, D., Imberty, A., and Gilboa-Garber, N., 2002, J Biochem 132: 353-358). The present communication reports the discovery of the second one, RS-IIL (subunit M(r) 11.6 kDa), a tetrameric lectin, with high sequence similarity to the fucose-binding lectin PA-IIL of Pseudomonas aeruginosa. RS-IIL recognizes fucose but displays much higher affinity to mannose and fructose, which is opposite to the preference spectrum of PA-IIL. Determination of the crystal structure of RS-IIL complexed with a mannose derivative demonstrates a tetrameric structure very similar to the recently solved PA-IIL structure (Mitchell, E., et al., 2002, Nature Struct Biol 9: 918-921). Each monomer contains two close calcium cations that mediate the binding of the monosaccharide and explain the outstandingly high affinity to the monosaccharide ligand. The binding loop of the cations is fully conserved in RS-IIL and PA-IIL, whereas the preference for mannose versus fucose can be attributed to the change of a three-amino-acid sequence in the 'specificity loop'.

  • Organizational Affiliation

    Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan, 52900, Israel.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
LECTIN113Ralstonia solanacearumMutation(s): 0 
Find proteins for Q8XUA5 (Ralstonia nicotianae (strain GMI1000))
Explore Q8XUA5 
Go to UniProtKB:  Q8XUA5
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ8XUA5
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.70 Å
  • R-Value Free: 0.139 
  • R-Value Work: 0.116 
  • R-Value Observed: 0.118 
  • Space Group: I 2 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 59.132α = 90
b = 61.707β = 90
c = 74.788γ = 90
Software Package:
Software NamePurpose
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

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Ligand Structure Quality Assessment 

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2004-04-28
    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: 2018-06-27
    Changes: Data collection, Derived calculations
  • Version 1.4: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Data collection, Derived calculations, Other, Structure summary