2YMZ

Crystal structure of chicken Galectin 2


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.75 Å
  • R-Value Free: 0.227 
  • R-Value Work: 0.189 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Fine-Tuning of Prototype Chicken Galectins: Structure of Cg-2 and Structure-Activity Correlations

Ruiz, F.M.Fernandez, I.S.Lopez-Merino, L.Lagartera, L.Kaltner, H.Menendez, M.Andre, S.Solis, D.Gabius, H.-J.Romero, A.

(2013) Acta Crystallogr.,Sect.D 69: 1665

  • DOI: 10.1107/S0907444913011773

  • PubMed Abstract: 
  • The comparatively small number of members of the family of adhesion/growth-regulatory galectins in chicken predestines this system as an attractive model to study the divergence of these lectins after gene duplication. Expression profiling of the thr ...

    The comparatively small number of members of the family of adhesion/growth-regulatory galectins in chicken predestines this system as an attractive model to study the divergence of these lectins after gene duplication. Expression profiling of the three homodimeric (prototype) chicken galectins (CG-1A, CG-1B and CG-2) has raised evidence of distinct functionalities, explaining the interest in a detailed crystallographic analysis of CG-2. As revealed here, marked differences are found in the ligand-binding site and in the contact pattern within the homodimer interface, underlying a characteristic orientation of the two subunits. Notably, a distinctive trimer of dimers that is unique in all galectin crystal structures reported to date forms the core unit of the crystallographic assembly. Combination with spectroscopic and thermodynamic measurements, and comparisons with CG-1A and CG-1B, identify differential changes in the circular-dichroism spectra in the presence of lactose, reflecting the far-reaching impact of the ligand on hydrodynamic behaviour, and inter-galectin differences in both the entropy and the enthalpy of binding. This structural information is a salient step to complete the analysis of the full set of galectins from this model organism.


    Organizational Affiliation

    Departamento de Biología Físico-Química, Centro de Investigaciones Biológicas - CSIC, Ramiro de Maeztu 9, 28040 Madrid, Spain.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
GALECTIN 2
A, B, C, D, E, F
130Gallus gallusMutation(s): 0 
Gene Names: LGALS2
Find proteins for E1C0Z4 (Gallus gallus)
Go to Gene View: LGALS2
Go to UniProtKB:  E1C0Z4
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A, B, C, D, F
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
LAT
Query on LAT

Download SDF File 
Download CCD File 
B, D
BETA-LACTOSE
C12 H22 O11
GUBGYTABKSRVRQ-DCSYEGIMSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
LATKa: 6000 M-1 BINDINGMOAD
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.75 Å
  • R-Value Free: 0.227 
  • R-Value Work: 0.189 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 65.853α = 90.00
b = 90.700β = 90.00
c = 151.657γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
SCALAdata scaling
MOSFLMdata reduction
MOLREPphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-08-28
    Type: Initial release
  • Version 1.1: 2013-09-11
    Type: Database references