3DUI

Crystal structure of the oxidized CG-1B: an adhesion/growth-regulatory lectin from chicken


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.286 
  • R-Value Work: 0.238 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Homodimeric chicken galectin CG-1B (C-14): Crystal structure and detection of unique redox-dependent shape changes involving inter- and intrasubunit disulfide bridges by gel filtration, ultracentrifugation, site-directed mutagenesis, and peptide mass fingerprinting

Lopez-Lucendo, M.F.Solis, D.Saiz, J.L.Kaltner, H.Russwurm, R.Andre, S.Gabius, H.-J.Romero, A.

(2009) J.Mol.Biol. 386: 366-378

  • DOI: 10.1016/j.jmb.2008.09.054

  • PubMed Abstract: 
  • Intrafamily gene diversification has led to three prototype galectins in chicken [i.e., chicken galectin (CG)-1A, CG-1B, and CG-2] that show distinct expression profiles and developmental regulation. In order to pinpoint structural disparities among ...

    Intrafamily gene diversification has led to three prototype galectins in chicken [i.e., chicken galectin (CG)-1A, CG-1B, and CG-2] that show distinct expression profiles and developmental regulation. In order to pinpoint structural disparities among them, we determined the crystal structure of CG-1B. Alteration of the position of the Trp ring in the lectin site and the presence of only two ordered water molecules therein, as well as changes in the interface region between the two subunits, set the structure of CG-1B clearly apart from that of CG-1A. Intriguingly, the unique presence of two Cys residues at positions 2 and 7 in the N-terminal region translated into formation of an intersubunit disulfide bridge between the Cys7 residues of the homodimer in the crystal. In solution, oxidation is associated with significant shape changes in the dimeric protein and the additional occurrence of a compacted form with an intrasubunit disulfide bridge between Cys2 and Cys7. The single-site mutant C7S/C7V was not subjected to such changes, supporting the crucial role of Cys7 in redox-dependent shape changes. These results point to the functional significance of the distinctive presence of the two Cys residues in the N-terminal region of CG-1B.


    Organizational Affiliation

    Departamento de Ciencia de Proteínas, Centro de Investigaciones Biológicas, CSIC, Madrid, Spain.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Beta-galactoside-binding lectin
A, B
135Gallus gallusMutation(s): 0 
Gene Names: CG-1B
Find proteins for P07583 (Gallus gallus)
Go to UniProtKB:  P07583
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
BME
Query on BME

Download SDF File 
Download CCD File 
A, B
BETA-MERCAPTOETHANOL
C2 H6 O S
DGVVWUTYPXICAM-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.286 
  • R-Value Work: 0.238 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 71.590α = 90.00
b = 107.640β = 90.00
c = 35.830γ = 90.00
Software Package:
Software NamePurpose
MOSFLMdata reduction
SCALAdata scaling
DNAdata collection
AMoREphasing
CNSrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-06-30
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance