ISDA

Deposition Date 2015-11-23

Release Date 2016-10-05

Last Version Date 2023-09-27

Entry Detail

PDB ID:

5EXO

Keywords:

SUGAR BINDING PROTEIN

Title:

Crystal structure of Human galectin-3 CRD in complex with methyl 2-O-acetyl-3-O-(2H-chromene-3-yl-methyl)-a-D-galactopyranoside inhibitor

Biological Source:

Source Organism:

Homo sapiens (Taxon ID: 9606)

Host Organism:

Escherichia coli

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

1.50 Å

R-Value Free:

0.19

R-Value Work:

0.15

R-Value Observed:

0.15

Space Group:

P 21 21 21

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Molecule:Galectin-3
Gene (Uniprot):LGALS3
Chain IDs:A
Chain Length:139
Number of Molecules:1
Biological Source:Homo sapiens

UniProt ID:P17931 Pfam ID:PF00337

Ligand Molecules

5SY

Primary Citation

A Selective Galactose-Coumarin-Derived Galectin-3 Inhibitor Demonstrates Involvement of Galectin-3-glycan Interactions in a Pulmonary Fibrosis Model.

Rajput, V.K, MacKinnon, A, Mandal, S, Collins, P, Blanchard, H, Leffler, H, Sethi, T, Schambye, H, Mukhopadhyay, B, Nilsson, U.J.Show

J.Med.Chem. 59 8141 8147 (2016)

PMID: 27500311 DOI: 10.1021/acs.jmedchem.6b00957

Abstact

Synthesis of doubly 3-O-coumarylmethyl-substituted thiodigalactosides from bis-3-O-propargyl-thiodigalactoside resulted in highly selective and high affinity galectin-3 inhibitors. Mutant studies, structural analysis, and molecular modeling revealed that the coumaryl substituents stack onto arginine side chains. One inhibitor displayed efficacy in a murine model of bleomycin-induced lung fibrosis similar to that of a known nonselective galectin-1/galectin-3 inhibitor, which strongly suggests that blocking galectin-3 glycan recognition is an important antifibrotic drug target.

Legend

Protein

Chemical

Disease

Primary Citation of related structures