Galectin-1 in complex with thiogalactoside derivative

Experimental Data Snapshot

  • Resolution: 1.54 Å
  • R-Value Free: 0.219 
  • R-Value Work: 0.175 

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Discovery of the Selective and Orally Available Galectin-1 Inhibitor GB1908 as a Potential Treatment for Lung Cancer.

Zetterberg, F.R.Peterson, K.Nilsson, U.J.Andreasson Dahlgren, K.Diehl, C.Holyer, I.Hakansson, M.Khabut, A.Kahl-Knutson, B.Leffler, H.MacKinnon, A.C.Roper, J.A.Slack, R.J.Zarrizi, R.Pedersen, A.

(2024) J Med Chem 67: 9374-9388

  • DOI: https://doi.org/10.1021/acs.jmedchem.4c00485
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    We have previously described a new series of selective and orally available galectin-1 inhibitors resulting in the thiazole-containing glycomimetic GB1490. Here, we show that the introduction of polar substituents to the thiazole ring results in galectin-1-specific compounds with low nM affinities. X-ray structural analysis of a new ligand-galectin-1 complex shows changes in the binding mode and ligand-protein hydrogen bond interactions compared to the GB1490-galectin-1 complex. These new high affinity ligands were further optimized with respect to affinity and ADME properties resulting in the galectin-1-selective GB1908 ( K d galectin-1/3 0.057/6.0 μM). In vitro GB1908 inhibited galectin-1-induced apoptosis in Jurkat cells (IC 50 = 850 nM). Pharmacokinetic experiments in mice revealed that a dose of 30 mg/kg b.i.d. results in free levels of GB1908 in plasma over galectin-1 K d for 24 h. GB1908 dosed with this regimen reduced the growth of primary lung tumor LL/2 in a syngeneic mouse model.

  • Organizational Affiliation

    Galecto Biotech AB, Sahlgrenska Science Park, Medicinaregatan 8 A, SE-413 46 Gothenburg,Sweden.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
A, B
135Homo sapiensMutation(s): 0 
Gene Names: LGALS1
UniProt & NIH Common Fund Data Resources
Find proteins for P09382 (Homo sapiens)
Explore P09382 
Go to UniProtKB:  P09382
PHAROS:  P09382
GTEx:  ENSG00000100097 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP09382
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
YBC (Subject of Investigation/LOI)
Query on YBC

Download Ideal Coordinates CCD File 
C [auth A],
D [auth B]
C17 H16 Cl2 N4 O5 S2
Experimental Data & Validation

Experimental Data

  • Resolution: 1.54 Å
  • R-Value Free: 0.219 
  • R-Value Work: 0.175 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 53.139α = 90
b = 62.352β = 90
c = 98.016γ = 90
Software Package:
Software NamePurpose
xia2data reduction
Aimlessdata scaling

Structure Validation

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Ligand Structure Quality Assessment 

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
Not funded--

Revision History  (Full details and data files)

  • Version 1.0: 2024-06-05
    Type: Initial release
  • Version 1.1: 2024-06-19
    Changes: Database references