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| | ==Crystal structure of galectin-3 CRD domian complexed with Thomsen-Friedenreich antigen== | | ==Crystal structure of galectin-3 CRD domian complexed with Thomsen-Friedenreich antigen== |
| | <StructureSection load='3aya' size='340' side='right' caption='[[3aya]], [[Resolution|resolution]] 2.00Å' scene=''> | | <StructureSection load='3aya' size='340' side='right' caption='[[3aya]], [[Resolution|resolution]] 2.00Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[3aya]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3AYA OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3AYA FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[3aya]] is a 2 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=3AYA OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3AYA FirstGlance]. <br> |
| | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene>, <scene name='pdbligand=THR:THREONINE'>THR</scene>, <scene name='pdbligand=A2G:N-ACETYL-2-DEOXY-2-AMINO-GALACTOSE'>A2G</scene>, <scene name='pdbligand=GAL:BETA-D-GALACTOSE'>GAL</scene></td></tr> | | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene>, <scene name='pdbligand=THR:THREONINE'>THR</scene>, <scene name='pdbligand=A2G:N-ACETYL-2-DEOXY-2-AMINO-GALACTOSE'>A2G</scene>, <scene name='pdbligand=GAL:BETA-D-GALACTOSE'>GAL</scene></td></tr> |
| | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[3ayc|3ayc]], [[3ayd|3ayd]], [[3aye|3aye]]</td></tr> | | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[3ayc|3ayc]], [[3ayd|3ayd]], [[3aye|3aye]]</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 Homo sapiens])</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='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=3aya FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3aya OCA], [http://www.rcsb.org/pdb/explore.do?structureId=3aya RCSB], [http://www.ebi.ac.uk/pdbsum/3aya PDBsum]</span></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=3aya FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3aya OCA], [http://pdbe.org/3aya PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=3aya RCSB], [http://www.ebi.ac.uk/pdbsum/3aya PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=3aya ProSAT]</span></td></tr> |
| | </table> | | </table> |
| | == Function == | | == Function == |
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| | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> |
| | </div> | | </div> |
| | + | <div class="pdbe-citations 3aya" style="background-color:#fffaf0;"></div> |
| | | | |
| | ==See Also== | | ==See Also== |
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| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Homo sapiens]] | + | [[Category: Human]] |
| | [[Category: Bian, C F]] | | [[Category: Bian, C F]] |
| | [[Category: Li, D F]] | | [[Category: Li, D F]] |
| Structural highlights
3aya is a 2 chain structure with sequence from Human. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
| | Ligands: | , , , |
| Related: | 3ayc, 3ayd, 3aye |
| Gene: | LGALS3, MAC2 (HUMAN) |
| Resources: | FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT |
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
The Thomsen-Friedenreich (TF or T) antigen, Galbeta1-3GalNAcalpha1-O-Ser/Thr, is the core 1 structure of O-linked mucin type glycans appearing in tumor-associated glycosylation. The TF antigen occurs in about 90% of human cancer cells and is a potential ligand for the human endogenous galectins. It has been reported that human galectin-1 (Gal-1) and galectin-3 (Gal-3) can perform their cancer-related functions via specifically recognizing TF antigen. However, the detailed binding properties have not been clarified and structurally characterized. In this work, first we identified the distinct TF-binding abilities of Gal-1 and Gal-3. The affinity to TF antigen for Gal-3 is two orders of magnitude higher than that for Gal-1. The structures of Gal-3 carbohydrate recognition domain (CRD) complexed with TF antigen and derivatives, TFN and GM1, were then determined. These structures show a unique Glu-water-Arg-water motif-based mode as previously observed in the mushroom galectin AAL. The observation demonstrates that this recognition mode is commonly adopted by TF-binding galectins, either as endogenous or exogenous ones. The detailed structural comparisons between Gal-1 and Gal-3 CRD and mutagenesis experiments reveal that a pentad residue motif ((51)AHGDA(55)) at the loop (g1-L4) connecting beta-strands 4 and 5 of Gal-1 produces a serious steric hindrance for TF binding. This motif is the main structural basis for Gal-1 with the low affinity to TF antigen. These findings provide the intrinsic structural elements for regulating the TF-binding activity of Gal-1 in some special conditions and also show certain target and approach for mediating some tumor-related bioactivities of human galectins.
Structural basis for distinct binding properties of the human galectins to thomsen-friedenreich antigen.,Bian CF, Zhang Y, Sun H, Li DF, Wang DC PLoS One. 2011;6(9):e25007. Epub 2011 Sep 20. PMID:21949831[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
- ↑ Bian CF, Zhang Y, Sun H, Li DF, Wang DC. Structural basis for distinct binding properties of the human galectins to thomsen-friedenreich antigen. PLoS One. 2011;6(9):e25007. Epub 2011 Sep 20. PMID:21949831 doi:10.1371/journal.pone.0025007
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