6B94

Crystal structure of Human galectin-1 in complex with Lactulose


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.233 
  • R-Value Work: 0.209 
  • R-Value Observed: 0.210 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Lactulose as a novel template for anticancer drug development targeting galectins.

Kishor, C.Ross, R.L.Blanchard, H.

(2018) Chem Biol Drug Des 92: 1801-1808

  • DOI: 10.1111/cbdd.13348
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • Galectins are carbohydrate binding proteins (lectins), which characteristically bind β-galactosides. Galectins play a role in tumour progression through involvement in proliferation, metastasis, angiogenesis, immune evasion and drug resistance. There ...

    Galectins are carbohydrate binding proteins (lectins), which characteristically bind β-galactosides. Galectins play a role in tumour progression through involvement in proliferation, metastasis, angiogenesis, immune evasion and drug resistance. There is need for inhibitors (antagonists) that are specific for distinct galectins and that can interfere with galectin-carbohydrate interactions during cancer progression. Here, we propose that lactulose, a non-digestible galactose-fructose disaccharide, presents a novel inhibitor scaffold for design of inhibitors against galectins. Thermodynamic evaluation displays binding affinity of lactulose against the galectin-1 and galectin-3 carbohydrate recognition domain (CRD). Crystal structures of galectin-1 and galectin-3 in complex with lactulose reveal for the first time the molecular basis of the galectin-lactulose interactions. Molecular modelling was implemented to propose novel lactulose derivatives as potent anti-cancer agents.


    Organizational Affiliation

    Institute for Glycomics, Griffith University, Gold Coast, QLD, Australia.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Galectin-1
A, B
134Homo sapiensMutation(s): 0 
Gene Names: LGALS1
Find proteins for P09382 (Homo sapiens)
Go to UniProtKB:  P09382
NIH Common Fund Data Resources
PHAROS  P09382
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
W9T
Query on W9T

Download CCD File 
A, B
4-O-beta-D-galactopyranosyl-beta-D-fructofuranose
C12 H22 O11
JCQLYHFGKNRPGE-FCVZTGTOSA-N
 Ligand Interaction
BME
Query on BME

Download CCD File 
A, B
BETA-MERCAPTOETHANOL
C2 H6 O S
DGVVWUTYPXICAM-UHFFFAOYSA-N
 Ligand Interaction
ACT
Query on ACT

Download CCD File 
B
ACETATE ION
C2 H3 O2
QTBSBXVTEAMEQO-UHFFFAOYSA-M
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.233 
  • R-Value Work: 0.209 
  • R-Value Observed: 0.210 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 43.23α = 90
b = 58.32β = 90
c = 111.5γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
MOSFLMdata reduction
SCALAdata scaling
MOLREPphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2018-10-10
    Type: Initial release
  • Version 1.1: 2020-04-22
    Changes: Database references, Structure summary