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: 2.10 Å
  • R-Value Free: 0.240 
  • R-Value Work: 0.170 
  • R-Value Observed: 0.170 

wwPDB Validation   3D Report Full Report


This is version 2.0 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

  • DOI: 10.1074/jbc.273.21.13047
  • Primary Citation of Related Structures:  
    1A3K

  • 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 x-ray crystal structure of the human galectin-3 CRD, in complex with lactose and N-acetyllactosamine, at 2 ...

    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 U S A 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:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
GALECTIN-3 A137Homo sapiensMutation(s): 0 
Gene Names: LGALS3MAC2
Find proteins for P17931 (Homo sapiens)
Explore P17931 
Go to UniProtKB:  P17931
NIH Common Fund Data Resources
PHAROS:  P17931
Protein Feature View
Expand
  • Reference Sequence
Oligosaccharides

Help

Entity ID: 2
MoleculeChainsChain Length2D Diagram Glycosylation3D Interactions
beta-D-galactopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose
B
2 N/A Oligosaccharides Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.240 
  • R-Value Work: 0.170 
  • R-Value Observed: 0.170 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 37.6α = 90
b = 58.4β = 90
c = 64γ = 90
Software Package:
Software NamePurpose
PHASESphasing
X-PLORmodel building
X-PLORrefinement
XDSdata reduction
X-PLORphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1998-07-15
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Non-polymer description, Version format compliance
  • Version 1.3: 2018-04-04
    Changes: Data collection
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Atomic model, Data collection, Derived calculations, Structure summary