1KU8

Crystal structure of Jacalin


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.75 Å
  • R-Value Free: 0.225 
  • R-Value Work: 0.191 

Starting Model: experimental
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This is version 1.3 of the entry. See complete history


Literature

Structural basis for the unusual carbohydrate-binding specificity of jacalin towards galactose and mannose.

Bourne, Y.Astoul, C.H.Zamboni, V.Peumans, W.J.Menu-Bouaouiche, L.Van Damme, E.J.Barre, A.Rouge, P.

(2002) Biochem J 364: 173-180

  • DOI: https://doi.org/10.1042/bj3640173
  • Primary Citation of Related Structures:  
    1KU8, 1KUJ

  • PubMed Abstract: 

    Evidence is presented that the specificity of jacalin, the seed lectin from jack fruit (Artocarpus integrifolia), is not directed exclusively against the T-antigen disaccharide Galbeta1,3GalNAc, lactose and galactose, but also against mannose and oligomannosides. Biochemical analyses based on surface-plasmon-resonance measurements, combined with the X-ray-crystallographic determination of the structure of a jacalin-alpha-methyl-mannose complex at 2 A resolution, demonstrated clearly that jacalin is fully capable of binding mannose. Besides mannose, jacalin also interacts readily with glucose, N-acetylneuraminic acid and N-acetylmuramic acid. Structural analyses demonstrated that the relatively large size of the carbohydrate-binding site enables jacalin to accommodate monosaccharides with different hydroxyl conformations and provided unambiguous evidence that the beta-prism structure of jacalin is a sufficiently flexible structural scaffold to confer different carbohydrate-binding specificities to a single lectin.


  • Organizational Affiliation

    AFMB, UMR-CNRS 6098, 31 Chemin Joseph Aiguier, 13402 Marseille Cedex 20, France.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
JACALIN ALPHA CHAIN
A, C, E, G
133Artocarpus integerMutation(s): 0 
UniProt
Find proteins for P18670 (Artocarpus integer)
Explore P18670 
Go to UniProtKB:  P18670
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP18670
Sequence Annotations
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  • Reference Sequence

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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
JACALIN BETA CHAIN
B, D, F, H
18Artocarpus integerMutation(s): 0 
UniProt
Find proteins for P18671 (Artocarpus integer)
Explore P18671 
Go to UniProtKB:  P18671
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP18671
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.75 Å
  • R-Value Free: 0.225 
  • R-Value Work: 0.191 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 58.795α = 90
b = 82.612β = 106.8
c = 63.482γ = 90
Software Package:
Software NamePurpose
AMoREphasing
CNSrefinement
DENZOdata reduction
CCP4data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2002-06-19
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2023-08-16
    Changes: Data collection, Database references, Refinement description