View source for 7cya


==Saimiri boliviensis boliviensis galectin-13 with lactose==
<StructureSection load='7cya' size='340' side='right'caption='[[7cya]], [[Resolution|resolution]] 1.71&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[7cya]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Saimiri_boliviensis_boliviensis Saimiri boliviensis boliviensis]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=7CYA OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=7CYA 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]] 1.71&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=BGC:BETA-D-GLUCOSE'>BGC</scene>, <scene name='pdbligand=GAL:BETA-D-GALACTOSE'>GAL</scene>, <scene name='pdbligand=PRD_900004:beta-lactose'>PRD_900004</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=7cya FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7cya OCA], [https://pdbe.org/7cya PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=7cya RCSB], [https://www.ebi.ac.uk/pdbsum/7cya PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=7cya ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/A0A2K6TQH4_SAIBB A0A2K6TQH4_SAIBB] 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
The gene for galectin-13 (Gal-13, placental protein 13) is only present in primates, and its low expression level in maternal serum may promote pre-eclampsia. In the present study, we used pull-down experiments and biolayer interferometry to assess the interaction between Gal-13 and actin. These studies uncovered that human Gal-13 (hGal-13) and Saimiri boliviensis boliviensis (sGal-13) strongly bind to alpha- and beta/gamma-actin, with Ca2+ and ATP significantly enhancing interactions. This in turn suggests that h/sGal-13 may inhibit myosin-induced contraction when vascular smooth muscle cells undergo polarization. Here, we solved the crystal structure of sGal-13 bound to lactose and found that it exists as a monomer in contrast to hGal-13 that is a dimer. The distribution of sGal-13 in HeLa cells is similar to that of hGal-13, indicating that monomeric Gal-13 is the primary form in cells. Even though sGal-13 also binds to actin, hGal-13 ligand binding site mutants do not influence hGal-13/actin binding, whereas the monomeric mutant C136S/C138S binds to actin more strongly than wild type hGal-13. Overall, our study demonstrates that monomeric Gal-13 binds to actin, an interaction that is independent of the galectin canonical ligand binding site.

Actin binding to galectin-13/placental protein-13 occurs independently of the galectin canonical ligand binding site.,Li X, Yao Y, Liu T, Gu K, Han Q, Zhang W, Ayala GJ, Liu Y, Na H, Yu J, Zhang F, Mayo KH, Su J Glycobiology. 2021 May 31. pii: 6290097. doi: 10.1093/glycob/cwab047. PMID:34080003<ref>PMID:34080003</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 7cya" style="background-color:#fffaf0;"></div>

==See Also==
*[[Galectin 3D structures|Galectin 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Saimiri boliviensis boliviensis]]
[[Category: Su J]]