5DG1

Sugar binding protein - human galectin-2


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.2 Å
  • R-Value Free: 0.321 
  • R-Value Work: 0.297 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Human galectin-2 interacts with carbohydrates and peptides non-classically: new insight from X-ray crystallography and hemagglutination.

Si, Y.Feng, S.Gao, J.Wang, Y.Zhang, Z.Meng, Y.Zhou, Y.Tai, G.Su, J.

(2016) Acta Biochim.Biophys.Sin. --: --

  • DOI: 10.1093/abbs/gmw089
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Galectin-2 (Gal-2) plays a role in cancer, myocardial infarction, immune response, and gastrointestinal tract diseases. The only reported crystal structure of Gal-2 shows that it is a dimer in which the monomer subunits have almost identical structur ...

    Galectin-2 (Gal-2) plays a role in cancer, myocardial infarction, immune response, and gastrointestinal tract diseases. The only reported crystal structure of Gal-2 shows that it is a dimer in which the monomer subunits have almost identical structures, each binding with one molecule of lactose. In this study, we crystallized Gal-2 under new conditions that produced three crystal structures. In each Gal-2 dimer structure, lactose was shown to be bound to only one of the carbohydrate recognition domain subunits. In solution studies, the thermal shift assay demonstrated that inequivalent monomer subunits in the Gal-2 dimer become equivalent upon ligand binding. In addition, galectin-mediated erythrocyte agglutination assays using lactose and larger complex polysaccharides as inhibitors showed the structural differences between Gal-1 and Gal-2. Overall, our results reveal some novel aspects to the structural differentiation in Gal-2 and expand the potential for different types of molecular interactions that may be specific to this lectin.


    Organizational Affiliation

    Jilin Province Key Laboratory on Chemistry and Biology of Natural Drugs in Changbai Mountain, School of Life Sciences, Northeast Normal University, Changchun 130024, China.,Jilin Province Key Laboratory on Chemistry and Biology of Natural Drugs in Changbai Mountain, School of Life Sciences, Northeast Normal University, Changchun 130024, China sujy100@nenu.edu.cn.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Galectin-2
A, B, C, D, H, I
135Homo sapiensMutation(s): 0 
Gene Names: LGALS2
Find proteins for P05162 (Homo sapiens)
Go to Gene View: LGALS2
Go to UniProtKB:  P05162
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
BGC
Query on BGC

Download SDF File 
Download CCD File 
C, H, I
BETA-D-GLUCOSE
C6 H12 O6
WQZGKKKJIJFFOK-VFUOTHLCSA-N
 Ligand Interaction
GAL
Query on GAL

Download SDF File 
Download CCD File 
C, H, I
BETA-D-GALACTOSE
C6 H12 O6
WQZGKKKJIJFFOK-FPRJBGLDSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.2 Å
  • R-Value Free: 0.321 
  • R-Value Work: 0.297 
  • Space Group: P 2 21 21
Unit Cell:
Length (Å)Angle (°)
a = 38.500α = 90.00
b = 106.780β = 90.00
c = 182.110γ = 90.00
Software Package:
Software NamePurpose
PDB_EXTRACTdata extraction
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2015-08-27 
  • Released Date: 2016-09-14 
  • Deposition Author(s): Su, J.Y., Si, Y.L.

Revision History 

  • Version 1.0: 2016-09-14
    Type: Initial release
  • Version 1.1: 2017-09-27
    Type: Data collection, Derived calculations