Experimental Data Snapshot

  • Resolution: 3.00 Å
  • R-Value Free: 0.240 
  • R-Value Work: 0.160 
  • R-Value Observed: 0.160 

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The crystal structure of Canavalia brasiliensis lectin suggests a correlation between its quaternary conformation and its distinct biological properties from Concanavalin A.

Sanz-Aparicio, J.Hermoso, J.Grangeiro, T.B.Calvete, J.J.Cavada, B.S.

(1997) FEBS Lett 405: 114-118

  • DOI: https://doi.org/10.1016/s0014-5793(97)00137-3
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Canavalia brasiliensis lectin was isolated from the seeds of a Brazilian autochthonous Leguminosae plant. Despite extensive amino acid sequence similarity with Concanavalin A, C. brasiliensis lectin exerts in vitro and in vivo cellular effects that are markedly different from those displayed by Concanavalin A. We have solved the crystal structure of the C. brasiliensis lectin at 3.0 A resolution. The three-dimensional structure of the lectin monomer can be superimposed onto that of Concanavalin A with a root-mean-square deviation for all C alpha atoms of 0.65 A. However, this parameter is 0.84 and 1.62 A when the C. brasiliensis lectin dimer and tetramer, respectively, are compared with the same structures of Concanavalin A. We suggest that these differences in quaternary structure may account for the different biological properties of these two highly related Leguminosae lectins.

  • Organizational Affiliation

    Instituto de Química-Física Rocasolano CSIC, Departamento de Cristalografía, Madrid, Spain.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
A, B, C, D
237Canavalia brasiliensisMutation(s): 0 
Find proteins for P55915 (Canavalia brasiliensis)
Explore P55915 
Go to UniProtKB:  P55915
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP55915
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 3.00 Å
  • R-Value Free: 0.240 
  • R-Value Work: 0.160 
  • R-Value Observed: 0.160 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 71.29α = 90
b = 71.65β = 90
c = 190.96γ = 90
Software Package:
Software NamePurpose
X-PLORmodel building
MOSFLMdata reduction
CCP4data scaling
ROTAVATAdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1998-04-29
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2023-08-02
    Changes: Database references, Derived calculations, Other, Refinement description