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| ==Binding domain of Botulinum neurotoxin DC in complex with human synaptotagmin I== | | ==Binding domain of Botulinum neurotoxin DC in complex with human synaptotagmin I== |
| <StructureSection load='4isq' size='340' side='right' caption='[[4isq]], [[Resolution|resolution]] 2.65Å' scene=''> | | <StructureSection load='4isq' size='340' side='right'caption='[[4isq]], [[Resolution|resolution]] 2.65Å' scene=''> |
| == Structural highlights == | | == Structural highlights == |
| <table><tr><td colspan='2'>[[4isq]] is a 6 chain structure with sequence from [http://en.wikipedia.org/wiki/Clostridium_botulinum Clostridium botulinum]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4ISQ OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4ISQ FirstGlance]. <br> | | <table><tr><td colspan='2'>[[4isq]] is a 6 chain structure with sequence from [https://en.wikipedia.org/wiki/Clostridium_botulinum Clostridium botulinum] and [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4ISQ OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4ISQ FirstGlance]. <br> |
| </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</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]] 2.65Å</td></tr> |
| <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[4isr|4isr]]</td></tr> | | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</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=4isq FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4isq OCA], [http://www.rcsb.org/pdb/explore.do?structureId=4isq RCSB], [http://www.ebi.ac.uk/pdbsum/4isq PDBsum]</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=4isq FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4isq OCA], [https://pdbe.org/4isq PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4isq RCSB], [https://www.ebi.ac.uk/pdbsum/4isq PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4isq ProSAT]</span></td></tr> |
| </table> | | </table> |
| == Function == | | == Function == |
| [[http://www.uniprot.org/uniprot/SYT1_HUMAN SYT1_HUMAN]] May have a regulatory role in the membrane interactions during trafficking of synaptic vesicles at the active zone of the synapse. It binds acidic phospholipids with a specificity that requires the presence of both an acidic head group and a diacyl backbone. A Ca(2+)-dependent interaction between synaptotagmin and putative receptors for activated protein kinase C has also been reported. It can bind to at least three additional proteins in a Ca(2+)-independent manner; these are neurexins, syntaxin and AP2. | | [https://www.uniprot.org/uniprot/Q9LBR1_CLOBO Q9LBR1_CLOBO] |
| <div style="background-color:#fffaf0;">
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| == Publication Abstract from PubMed ==
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| Botulinum neurotoxins (BoNTs) can cause paralysis at exceptionally low concentrations and include seven serotypes (BoNT/A-G). The chimeric BoNT/DC toxin has a receptor binding domain similar to the same region in BoNT/C. However, BoNT/DC does not share protein receptor with BoNT/C. Instead, it shares synaptotagmin (Syt) I and II as receptors with BoNT/B, despite their low sequence similarity. Here, we present the crystal structures of the binding domain of BoNT/DC in complex with the recognition domains of its protein receptors, Syt-I and Syt-II. The structures reveal that BoNT/DC possesses a Syt binding site, distinct from the established Syt-II binding site in BoNT/B. Structure-based mutagenesis further shows that hydrophobic interactions play a key role in Syt binding. The structures suggest that the BoNT/DC ganglioside binding sites are independent of the protein receptor binding site. Our results reveal the remarkable versatility in the receptor recognition of the BoNTs.
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| Crystal Structures of Botulinum Neurotoxin DC in Complex with Its Protein Receptors Synaptotagmin I and II.,Berntsson RP, Peng L, Svensson LM, Dong M, Stenmark P Structure. 2013 Sep 3;21(9):1602-11. doi: 10.1016/j.str.2013.06.026. Epub 2013, Aug 8. PMID:23932591<ref>PMID:23932591</ref>
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| From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br>
| | ==See Also== |
| </div>
| | *[[Botulinum neurotoxin 3D structures|Botulinum neurotoxin 3D structures]] |
| == References == | | *[[Synaptotagmin 3D structures|Synaptotagmin 3D structures]] |
| <references/>
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| __TOC__ | | __TOC__ |
| </StructureSection> | | </StructureSection> |
| [[Category: Clostridium botulinum]] | | [[Category: Clostridium botulinum]] |
| [[Category: Berntsson, R P.A]] | | [[Category: Homo sapiens]] |
| [[Category: Dong, M]] | | [[Category: Large Structures]] |
| [[Category: Peng, L]] | | [[Category: Berntsson RP-A]] |
| [[Category: Stenmark, P]] | | [[Category: Dong M]] |
| [[Category: Svensson, L M]] | | [[Category: Peng L]] |
| [[Category: Membrane binding]] | | [[Category: Stenmark P]] |
| [[Category: Synaptotagmin and ganglioside binding]] | | [[Category: Svensson LM]] |
| [[Category: Toxin]]
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