4XBL

Crystal Structure of Human Galectin-1 in Complex with Type 1 N-acetyllactosamine


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.931 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.196 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Structural Basis Underlying the Binding Preference of Human Galectins-1, -3 and -7 for Gal beta 1-3/4GlcNAc.

Hsieh, T.J.Lin, H.Y.Tu, Z.Huang, B.S.Wu, S.C.Lin, C.H.

(2015) Plos One 10: e0125946-e0125946

  • DOI: 10.1371/journal.pone.0125946
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Galectins represent β-galactoside-binding proteins and are known to bind Galβ1-3/4GlcNAc disaccharides (abbreviated as LN1 and LN2, respectively). Despite high sequence and structural homology shared by the carbohydrate recognition domain (CRD) of al ...

    Galectins represent β-galactoside-binding proteins and are known to bind Galβ1-3/4GlcNAc disaccharides (abbreviated as LN1 and LN2, respectively). Despite high sequence and structural homology shared by the carbohydrate recognition domain (CRD) of all galectin members, how each galectin displays different sugar-binding specificity still remains ambiguous. Herein we provided the first structural evidence of human galectins-1, 3-CRD and 7 in complex with LN1. Galectins-1 and 3 were shown to have higher affinity for LN2 than for LN1, while galectin-7 displayed the reversed specificity. In comparison with the previous LN2-complexed structures, the results indicated that the average glycosidic torsion angle of galectin-bound LN1 (ψ(LN1) ≈ 135°) was significantly differed from that of galectin-bound LN2 (ψ(LN2 )≈ -108°), i.e. the GlcNAc moiety adopted a different orientation to maintain essential interactions. Furthermore, we also identified an Arg-Asp/Glu-Glu-Arg salt-bridge network and the corresponding loop (to position the second Asp/Glu residue) critical for the LN1/2-binding preference.


    Organizational Affiliation

    Institute of Biological Chemistry, Academia Sinica, Taipei, Taiwan.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Galectin-1
A, B
154Homo sapiensMutation(s): 0 
Gene Names: LGALS1
Find proteins for P09382 (Homo sapiens)
Go to Gene View: LGALS1
Go to UniProtKB:  P09382
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GAL
Query on GAL

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

Download SDF File 
Download CCD File 
A, B
N-ACETYL-D-GLUCOSAMINE
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
Modified Residues  2 Unique
IDChainsTypeFormula2D DiagramParent
CSO
Query on CSO
A, B
L-PEPTIDE LINKINGC3 H7 N O3 SCYS
CME
Query on CME
A, B
L-PEPTIDE LINKINGC5 H11 N O3 S2CYS
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.931 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.196 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 43.265α = 90.00
b = 58.211β = 90.00
c = 111.401γ = 90.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
PHASERphasing
PHENIXmodel building
PDB_EXTRACTdata extraction
PHENIXrefinement
HKL-2000data collection

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Academia SinicaTaiwanAS-022316
Ministry of Science and TechnologyTaiwan103-2113-M-001-023-MY3
Ministry of Science and TechnologyTaiwan102-2113-M-001-001-MY3
Ministry of Science and TechnologyTaiwan102-2923-M-001-001-MY3

Revision History 

  • Version 1.0: 2015-05-20
    Type: Initial release