8ILU | pdb_00008ilu

Crystal structure of mouse Galectin-3 in complex with small molecule inhibitor


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 
    0.229 (Depositor), 0.229 (DCC) 
  • R-Value Work: 
    0.164 (Depositor), 0.164 (DCC) 
  • R-Value Observed: 
    0.167 (Depositor) 

Starting Model: experimental
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Ligand Structure Quality Assessment 


This is version 1.2 of the entry. See complete history

Literature

Identification of benzothiazole derived monosaccharides as potent, selective, and orally bioavailable inhibitors of human and mouse galectin-3; a rare example of using a S···O binding interaction for drug design.

Liu, C.Wang, W.Feng, J.Beno, B.Raja, T.Swidorski, J.Manepalli, R.K.V.L.P.Vetrichelvan, M.Rao Jalagam, P.Nair, S.K.Gupta, A.Panda, M.Ghosh, K.Kaushikkumar Shukla, J.Sale, H.Shah, D.Singh Gautam, S.Patel, D.Mathur, A.Ellsworth, B.A.Cheng, D.Regueiro-Ren, A.

(2024) Bioorg Med Chem 101: 117638-117638

  • DOI: https://doi.org/10.1016/j.bmc.2024.117638
  • Primary Citation Related Structures: 
    8ILU

  • PubMed Abstract: 

    As a result of our continued efforts to pursue Gal-3 inhibitors that could be used to fully evaluate the potential of Gal-3 as a therapeutic target, two novel series of benzothiazole derived monosaccharides as potent (against both human and mouse Gal-3) and orally bioavailable Gal-3 inhibitors, represented by 4 and 5, respectively, were identified. These discoveries were made based on proposals that the benzothiazole sulfur atom could interact with the carbonyl oxygen of G182/G196 in h/mGal-3, and that the anomeric triazole moiety could be modified into an N-methyl carboxamide functionality. The interaction between the benzothiazole sulfur and the carbonyl oxygen of G196 in mGal-3 was confirmed by an X-ray co-crystal structure of early lead 9, providing a rare example of using a S···O binding interaction for drug design. It was found that for both the series, methylation of 3-OH in the monosaccharides caused no loss in h & mGal-3 potencies but significantly improved permeability of the molecules.


  • Organizational Affiliation
    • Research & Early Development, Bristol Myers Squibb Company, P.O. Box 4000, Princeton, NJ 08543, United States. Electronic address: chunjian.liu@bms.com.

Macromolecule Content 

  • Total Structure Weight: 34.11 kDa 
  • Atom Count: 2,459 
  • Modeled Residue Count: 275 
  • Deposited Residue Count: 292 
  • Unique protein chains: 1

Macromolecules

Find similar proteins by:|  3D Structure
Entity ID: 1
MoleculeChains  Sequence LengthOrganismDetailsImage
Galectin-3
A, B
146Mus musculusMutation(s): 0 
Gene Names: Lgals3
UniProt
Find proteins for P16110 (Mus musculus)
Explore P16110 
Go to UniProtKB:  P16110
Entity Groups
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP16110
Sequence Annotations
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Reference Sequence

Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free:  0.229 (Depositor), 0.229 (DCC) 
  • R-Value Work:  0.164 (Depositor), 0.164 (DCC) 
  • R-Value Observed: 0.167 (Depositor) 
Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 40.73α = 90
b = 49.6β = 94.16
c = 60.55γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
XDSdata reduction
Aimlessdata scaling
PHASERphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

& Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Other private--

Revision History  (Full details and data files)

  • Version 1.0: 2024-03-06
    Type: Initial release
  • Version 1.1: 2024-09-18
    Changes: Database references
  • Version 1.2: 2024-09-25
    Changes: Database references