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| | ==Human Galectin-3 in complex with a TF tumor-associated antigen mimetic== | | ==Human Galectin-3 in complex with a TF tumor-associated antigen mimetic== |
| - | <StructureSection load='6g0v' size='340' side='right' caption='[[6g0v]], [[Resolution|resolution]] 1.09Å' scene=''> | + | <StructureSection load='6g0v' size='340' side='right'caption='[[6g0v]], [[Resolution|resolution]] 1.09Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[6g0v]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Human Human]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6G0V OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6G0V FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[6g0v]] 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=6G0V OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6G0V FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=EGZ:(3~{R},5~{R},6~{S},7~{S},8~{R},13~{S})-5-(hydroxymethyl)-7-[(2~{S},3~{R},4~{S},5~{R},6~{R})-6-(hydroxymethyl)-3,4,5-tris(oxidanyl)oxan-2-yl]oxy-6-oxidanyl-11-oxidanylidene-2,4-dioxa-9-thia-12-azatricyclo[8.4.0.0^{3,8}]tetradec-1(10)-ene-13-carboxylic+acid'>EGZ</scene></td></tr> | + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.09Å</td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">LGALS3, MAC2 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 HUMAN])</td></tr>
| + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=EGZ:(3~{R},5~{R},6~{S},7~{S},8~{R},13~{S})-5-(hydroxymethyl)-7-[(2~{S},3~{R},4~{S},5~{R},6~{R})-6-(hydroxymethyl)-3,4,5-tris(oxidanyl)oxan-2-yl]oxy-6-oxidanyl-11-oxidanylidene-2,4-dioxa-9-thia-12-azatricyclo[8.4.0.0^{3,8}]tetradec-1(10)-ene-13-carboxylic+acid'>EGZ</scene></td></tr> |
| - | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6g0v FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6g0v OCA], [http://pdbe.org/6g0v PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=6g0v RCSB], [http://www.ebi.ac.uk/pdbsum/6g0v PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=6g0v ProSAT]</span></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=6g0v FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6g0v OCA], [https://pdbe.org/6g0v PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6g0v RCSB], [https://www.ebi.ac.uk/pdbsum/6g0v PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6g0v ProSAT]</span></td></tr> |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://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> | + | [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;"> | | <div style="background-color:#fffaf0;"> |
| | == Publication Abstract from PubMed == | | == Publication Abstract from PubMed == |
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| | </div> | | </div> |
| | <div class="pdbe-citations 6g0v" style="background-color:#fffaf0;"></div> | | <div class="pdbe-citations 6g0v" style="background-color:#fffaf0;"></div> |
| | + | |
| | + | ==See Also== |
| | + | *[[Galectin 3D structures|Galectin 3D structures]] |
| | == References == | | == References == |
| | <references/> | | <references/> |
| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Human]] | + | [[Category: Homo sapiens]] |
| - | [[Category: Carvalho, A L]] | + | [[Category: Large Structures]] |
| - | [[Category: Santarsia, S]] | + | [[Category: Carvalho AL]] |
| - | [[Category: Trovao, F G]] | + | [[Category: Santarsia S]] |
| - | [[Category: Cancer]] | + | [[Category: Trovao FG]] |
| - | [[Category: Cell adhesion]]
| + | |
| - | [[Category: Galectin-3]]
| + | |
| - | [[Category: Tf-mimetic]]
| + | |
| - | [[Category: Thomsen-friedenreich]]
| + | |
| - | [[Category: Tumour antigen]]
| + | |
| Structural highlights
Function
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.[1] [2] [3]
Publication Abstract from PubMed
Overexpression of the Thomsen-Friedenreich (TF) antigen in cell membrane proteins occurs in 90% of adenocarcinomas. Additionally, the binding of the TF-antigen to human galectin-3 (Gal-3), also frequently overexpressed in malignancy, promotes cancer progression and metastasis. In this context, structures that interfere with this specific interaction display the potential to prevent cancer metastasis. Herein, a multidisciplinary approach, combining the optimized synthesis of a TF-antigen mimetic with NMR, X-ray crystallography methods and isothermal titration calorimetry assays has been employed to unravel the molecular structural details that govern the Gal-3/TF-mimetic interaction. The TF-mimetic presents a binding affinity for Gal-3 similar to the TF-natural antigen and retains the binding epitope and the bioactive conformation observed for the native antigen. Furthermore, from a thermodynamic perspective a decrease in the enthalpic contribution was observed for the Gal-3/TF-mimetic complex, however this behaviour is compensated by a favourable entropy gain. From a structural perspective, these results establish our TF-mimetic as a scaffold to design multivalent solutions to potentially interfere with Gal-3 aberrant interactions and likely be used to hamper Gal-3-mediated cancer cells adhesion and metastasis.
Molecular recognition of a Thomsen-Friedenreich antigen mimetic targeting human galectin-3.,Santarsia S, Grosso AS, Trovao F, Jimenez-Barbero J, Carvalho AL, Nativi C, Marcelo F ChemMedChem. 2018 Aug 9. doi: 10.1002/cmdc.201800525. PMID:30094951[4]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Fukushi J, Makagiansar IT, Stallcup WB. NG2 proteoglycan promotes endothelial cell motility and angiogenesis via engagement of galectin-3 and alpha3beta1 integrin. Mol Biol Cell. 2004 Aug;15(8):3580-90. Epub 2004 Jun 4. PMID:15181153 doi:http://dx.doi.org/10.1091/mbc.E04-03-0236
- ↑ Henderson NC, Sethi T. The regulation of inflammation by galectin-3. Immunol Rev. 2009 Jul;230(1):160-71. doi: 10.1111/j.1600-065X.2009.00794.x. PMID:19594635 doi:10.1111/j.1600-065X.2009.00794.x
- ↑ Haudek KC, Spronk KJ, Voss PG, Patterson RJ, Wang JL, Arnoys EJ. Dynamics of galectin-3 in the nucleus and cytoplasm. Biochim Biophys Acta. 2010 Feb;1800(2):181-189. Epub 2009 Jul 16. PMID:19616076 doi:S0304-4165(09)00194-9
- ↑ Santarsia S, Grosso AS, Trovao F, Jimenez-Barbero J, Carvalho AL, Nativi C, Marcelo F. Molecular recognition of a Thomsen-Friedenreich antigen mimetic targeting human galectin-3. ChemMedChem. 2018 Aug 9. doi: 10.1002/cmdc.201800525. PMID:30094951 doi:http://dx.doi.org/10.1002/cmdc.201800525
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