View source for 8z25


==Crystal structure of mouse Galectin-3 in complex with small molecule inhibitor==
<StructureSection load='8z25' size='340' side='right'caption='[[8z25]], [[Resolution|resolution]] 1.72&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[8z25]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=8Z25 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=8Z25 FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.72&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=A1L0R:5-[(2~{S},3~{R},4~{R},5~{R},6~{R})-4-[4-[4-bromanyl-2,3-bis(fluoranyl)phenyl]-1,2,3-triazol-1-yl]-6-(hydroxymethyl)-3,5-bis(oxidanyl)oxan-2-yl]-4-[5-chloranyl-2-(trifluoromethyl)phenyl]-2-methyl-1,2,4-triazole-3-thione'>A1L0R</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene></td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=8z25 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=8z25 OCA], [https://pdbe.org/8z25 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=8z25 RCSB], [https://www.ebi.ac.uk/pdbsum/8z25 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=8z25 ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/LEG3_HUMAN LEG3_HUMAN] Galactose-specific lectin which binds IgE. May mediate with the alpha-3, beta-1 integrin the stimulation by CSPG4 of endothelial cells migration. Together with DMBT1, required for terminal differentiation of columnar epithelial cells during early embryogenesis (By similarity). In the nucleus: acts as a pre-mRNA splicing factor. Involved in acute inflammatory responses including neutrophil activation and adhesion, chemoattraction of monocytes macrophages, opsonization of apoptotic neutrophils, and activation of mast cells.<ref>PMID:15181153</ref> <ref>PMID:19594635</ref> <ref>PMID:19616076</ref> 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Galectin-3 (Gal-3) is a carbohydrate binding protein that has been implicated in the development and progression of fibrotic diseases. Proof-of-principal animal models have demonstrated that inhibition of Gal-3 is a potentially viable pathway for the treatment of fibrosis horizontal line with small molecule Gal-3 inhibitors advanced into clinical trials. We hereby report the discovery of novel galactose-based monosaccharide Gal-3 inhibitors comprising 2-methyl-4-phenyl-2,4-dihydro-3H-1,2,4-triazole-3-thione (compound 20) and 4-phenyl-4H-1,2,4-triazole (compound 15). Notably, hindered rotation caused by steric interaction between the 3-thione and ortho-trifluoromethyl group of compounds 20, 21 induced formation of thermodynamically stable atropisomers. Distinct X-ray cocrystal structures of 20 and 21 were obtained, which clearly demonstrated that the configuration of 21 proscribes a key halogen bonding sigma-hole interaction of 3-chloro with carbonyl oxygen of Gly182, thereby leading to significant loss in potency. Ultimately, 20 and 15 were evaluated in mouse pharmacokinetic studies, and both compounds exhibited oral exposures suitable for further in vivo assessment.

Atropisomerism Observed in Galactose-Based Monosaccharide Inhibitors of Galectin-3 Comprising 2-Methyl-4-phenyl-2,4-dihydro-3H-1,2,4-triazole-3-thione.,Yoon DS, Liu C, Jalagam PR, Feng J, Wang W, Swidorski JJ, Xu L, Hartz RA, Nair SK, Beno BR, Panda M, Ghosh K, Kumar A, Sale H, Shah D, Mathur A, Ellsworth BA, Cheng D, Regueiro-Ren A J Med Chem. 2024 Aug 22;67(16):14184-14199. doi: 10.1021/acs.jmedchem.4c01008. , Epub 2024 Aug 5. PMID:39102502<ref>PMID:39102502</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 8z25" style="background-color:#fffaf0;"></div>
== References ==
<references/>
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</StructureSection>
[[Category: Homo sapiens]]
[[Category: Large Structures]]
[[Category: Amit K]]
[[Category: Ghosh K]]
[[Category: Swetha R]]