1A3K

X-RAY CRYSTAL STRUCTURE OF THE HUMAN GALECTIN-3 CARBOHYDRATE RECOGNITION DOMAIN (CRD) AT 2.1 ANGSTROM RESOLUTION


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.240 
  • R-Value Work: 0.170 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

X-ray crystal structure of the human galectin-3 carbohydrate recognition domain at 2.1-A resolution.

Seetharaman, J.Kanigsberg, A.Slaaby, R.Leffler, H.Barondes, S.H.Rini, J.M.

(1998) J.Biol.Chem. 273: 13047-13052


  • PubMed Abstract: 
  • Galectins are a family of lectins which share similar carbohydrate recognition domains (CRDs) and affinity for small beta-galactosides, but which show significant differences in binding specificity for more complex glycoconjugates. We report here the ...

    Galectins are a family of lectins which share similar carbohydrate recognition domains (CRDs) and affinity for small beta-galactosides, but which show significant differences in binding specificity for more complex glycoconjugates. We report here the x-ray crystal structure of the human galectin-3 CRD, in complex with lactose and N-acetyllactosamine, at 2.1-A resolution. This structure represents the first example of a CRD determined from a galectin which does not show the canonical 2-fold symmetric dimer organization. Comparison with the published structures of galectins-1 and -2 provides an explanation for the differences in carbohydrate-binding specificity shown by galectin-3, and for the fact that it fails to form dimers by analogous CRD-CRD interactions.


    Related Citations: 
    • Structure of S-Lectin, a Developmentally Regulated Vertebrate Beta-Galactoside-Binding Protein
      Liao, D.I.,Kapadia, G.,Ahmed, H.,Vasta, G.R.,Herzberg, O.
      (1994) Proc.Natl.Acad.Sci.USA 91: 1428
    • X-Ray Crystal Structure of the Human Dimeric S-Lac Lectin, L-14-II, in Complex with Lactose at 2.9-A Resolution
      Lobsanov, Y.D.,Gitt, M.A.,Leffler, H.,Barondes, S.H.,Rini, J.M.
      (1993) J.Biol.Chem. 268: 27034


    Organizational Affiliation

    Departments of Molecular and Medical Genetics and Biochemistry, University of Toronto, Toronto, Ontario, M5S 1A8, Canada.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
GALECTIN-3
A
137Homo sapiensGene Names: LGALS3 (MAC2)
Find proteins for P17931 (Homo sapiens)
Go to Gene View: LGALS3
Go to UniProtKB:  P17931
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GAL
Query on GAL

Download SDF File 
Download CCD File 
A
BETA-D-GALACTOSE
C6 H12 O6
WQZGKKKJIJFFOK-FPRJBGLDSA-N
 Ligand Interaction
NAG
Query on NAG

Download SDF File 
Download CCD File 
A
N-ACETYL-D-GLUCOSAMINE
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.240 
  • R-Value Work: 0.170 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 37.600α = 90.00
b = 58.400β = 90.00
c = 64.000γ = 90.00
Software Package:
Software NamePurpose
XDSdata reduction
X-PLORphasing
PHASESphasing
X-PLORrefinement
X-PLORmodel building

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1998-07-15
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Non-polymer description, Version format compliance