View source for 3zwh


==Ca2+-bound S100A4 C3S, C81S, C86S and F45W mutant complexed with myosin IIA==
<StructureSection load='3zwh' size='340' side='right'caption='[[3zwh]], [[Resolution|resolution]] 1.94&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[3zwh]] is a 3 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=3ZWH OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3ZWH 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]] 1.94&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ACT:ACETATE+ION'>ACT</scene>, <scene name='pdbligand=AZI:AZIDE+ION'>AZI</scene>, <scene name='pdbligand=CA:CALCIUM+ION'>CA</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=3zwh FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3zwh OCA], [https://pdbe.org/3zwh PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3zwh RCSB], [https://www.ebi.ac.uk/pdbsum/3zwh PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3zwh ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/S10A4_HUMAN S10A4_HUMAN] 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
S100A4 is a member of the S100 family of calcium-binding proteins that is directly involved in tumor metastasis. It binds to the nonmuscle myosin IIA (NMIIA) tail near the assembly competence domain (ACD) promoting filament disassembly, which could be associated with increasing metastatic potential of tumor cells. Here, we investigate the mechanism of S100A4-NMIIA interaction based on binding studies and the crystal structure of S100A4 in complex with a 45-residue-long myosin heavy chain fragment. Interestingly, we also find that S100A4 binds as strongly to a homologous heavy chain fragment of nonmuscle myosin IIC as to NMIIA. The structure of the S100A4-NMIIA complex reveals a unique mode of interaction in the S100 family: A single, predominantly alpha-helical myosin chain is wrapped around the Ca(2+)-bound S100A4 dimer occupying both hydrophobic binding pockets. Thermal denaturation experiments of coiled-coil forming NMIIA fragments indicate that the coiled-coil partially unwinds upon S100A4 binding. Based on these results, we propose a model for NMIIA filament disassembly: Part of the random coil tailpiece and the C-terminal residues of the coiled-coil are wrapped around an S100A4 dimer disrupting the ACD and resulting in filament dissociation. The description of the complex will facilitate the design of specific drugs that interfere with the S100A4-NMIIA interaction.

Crystal structure of the S100A4-nonmuscle myosin IIA tail fragment complex reveals an asymmetric target binding mechanism.,Kiss B, Duelli A, Radnai L, Kekesi KA, Katona G, Nyitray L Proc Natl Acad Sci U S A. 2012 Apr 17;109(16):6048-53. Epub 2012 Mar 28. PMID:22460785<ref>PMID:22460785</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 3zwh" style="background-color:#fffaf0;"></div>

==See Also==
*[[Myosin 3D Structures|Myosin 3D Structures]]
*[[S100 proteins 3D structures|S100 proteins 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Homo sapiens]]
[[Category: Large Structures]]
[[Category: Duelli A]]
[[Category: Katona G]]
[[Category: Kekesi AK]]
[[Category: Kiss B]]
[[Category: Nyitray L]]
[[Category: Radnai L]]