1JAC

A NOVEL MODE OF CARBOHYDRATE RECOGNITION IN JACALIN, A MORACEAE PLANT LECTIN WITH A BETA-PRISM


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.43 Å
  • R-Value Free: 0.260 
  • R-Value Work: 0.174 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

A novel mode of carbohydrate recognition in jacalin, a Moraceae plant lectin with a beta-prism fold.

Sankaranarayanan, R.Sekar, K.Banerjee, R.Sharma, V.Surolia, A.Vijayan, M.

(1996) Nat.Struct.Mol.Biol. 3: 596-603

  • Also Cited By: 1VBO, 1VBP, 1WS4, 1WS5, 4R6N, 4R6O, 4R6P, 4R6Q, 4R6R

  • PubMed Abstract: 
  • Jacalin, a tetrameric two-chain lectin (66,000 Mr) from jackfruit seeds, is highly specific for the tumour associated T-antigenic disaccharide. The crystal structure of jacalin with methyl-alpha-D-galactose reveals that each subunit has a three-fold ...

    Jacalin, a tetrameric two-chain lectin (66,000 Mr) from jackfruit seeds, is highly specific for the tumour associated T-antigenic disaccharide. The crystal structure of jacalin with methyl-alpha-D-galactose reveals that each subunit has a three-fold symmetric beta-prism fold made up of three four-stranded beta-sheets. The lectin exhibits a novel carbohydrate-binding site involving the N terminus of the alpha-chain which is generated through a post-translational modification involving proteolysis, the first known instance where such a modification has been used to confer carbohydrate specificity. This new lectin fold may be characteristic of the Moraceae plant family. The structure provides an explanation for the relative affinities of the lectin for galactose derivatives and provides insights into the structural basis of its T-antigen specificity.


    Related Citations: 
    • Primary Structure of a Thomsen-Friedenreich-Antigen-Specific Lectin, Jacalin [Artocarpus Integrifolia (Jack Fruit) Agglutinin]. Evidence for the Presence of an Internal Repeat
      Mahanta, S.K.,Sanker, S.,Rao, N.V.,Swamy, M.J.,Surolia, A.
      (1992) Biochem.J. 284: 95
    • Preparation and Preliminary X-Ray Studies of Two Crystal Forms of the Anti-T Lectin from Jackfruit (Artocarpus Integrifolia)
      Dhanaraj, V.,Patanjali, S.R.,Surolia, A.,Vijayan, M.
      (1988) J.Mol.Biol. 203: 1135
    • Preparation and X-Ray Characterization of Four New Crystal Forms of Jacalin, a Lectin from Artocarpus Integrifolia
      Banerjee, R.,Dhanaraj, V.,Mahanta, S.K.,Surolia, A.,Vijayan, M.
      (1991) J.Mol.Biol. 221: 773


    Organizational Affiliation

    Molecular Biophysics Unit, Indian Institute of Science, Bangalore, India.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
JACALIN
A, C, E, G
133Artocarpus integerN/A
Find proteins for P18670 (Artocarpus integer)
Go to UniProtKB:  P18670
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
JACALIN
B, D, F, H
20Artocarpus integerN/A
Find proteins for P18671 (Artocarpus integer)
Go to UniProtKB:  P18671
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
AMG
Query on AMG

Download SDF File 
Download CCD File 
A, C, E, G
ALPHA-METHYL-D-GALACTOSIDE
C7 H14 O6
HOVAGTYPODGVJG-PZRMXXKTSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.43 Å
  • R-Value Free: 0.260 
  • R-Value Work: 0.174 
  • Space Group: P 65 2 2
Unit Cell:
Length (Å)Angle (°)
a = 129.600α = 90.00
b = 129.600β = 90.00
c = 157.900γ = 120.00
Software Package:
Software NamePurpose
XENGENdata reduction
X-PLORrefinement
XENGENdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1997-06-05
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Derived calculations, Version format compliance