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| | <StructureSection load='3rk2' size='340' side='right'caption='[[3rk2]], [[Resolution|resolution]] 2.20Å' scene=''> | | <StructureSection load='3rk2' size='340' side='right'caption='[[3rk2]], [[Resolution|resolution]] 2.20Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[3rk2]] is a 8 chain structure with sequence from [https://en.wikipedia.org/wiki/Buffalo_rat Buffalo rat] and [https://en.wikipedia.org/wiki/Human Human]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3RK2 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3RK2 FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[3rk2]] is a 8 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens] and [https://en.wikipedia.org/wiki/Rattus_norvegicus Rattus norvegicus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3RK2 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3RK2 FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</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]] 2.2Å</td></tr> |
| - | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat"><div style='overflow: auto; max-height: 3em;'>[[3rk3|3rk3]]</div></td></tr>
| + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</scene></td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">VAMP2, SYB2 ([https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 HUMAN]), Stx1a, Sap ([https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=10116 Buffalo rat]), SNAP25, SNAP ([https://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'>[https://proteopedia.org/fgij/fg.htm?mol=3rk2 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3rk2 OCA], [https://pdbe.org/3rk2 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3rk2 RCSB], [https://www.ebi.ac.uk/pdbsum/3rk2 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3rk2 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=3rk2 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3rk2 OCA], [https://pdbe.org/3rk2 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3rk2 RCSB], [https://www.ebi.ac.uk/pdbsum/3rk2 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3rk2 ProSAT]</span></td></tr> |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[https://www.uniprot.org/uniprot/SNP25_HUMAN SNP25_HUMAN]] t-SNARE involved in the molecular regulation of neurotransmitter release. May play an important role in the synaptic function of specific neuronal systems. Associates with proteins involved in vesicle docking and membrane fusion. Regulates plasma membrane recycling through its interaction with CENPF. [[https://www.uniprot.org/uniprot/VAMP2_HUMAN VAMP2_HUMAN]] Involved in the targeting and/or fusion of transport vesicles to their target membrane. [[https://www.uniprot.org/uniprot/STX1A_RAT STX1A_RAT]] Potentially involved in docking of synaptic vesicles at presynaptic active zones. May play a critical role in neurotransmitter exocytosis. May mediate Ca(2+)-regulation of exocytosis acrosomal reaction in sperm.
| + | [https://www.uniprot.org/uniprot/VAMP2_HUMAN VAMP2_HUMAN] Involved in the targeting and/or fusion of transport vesicles to their target membrane. |
| - | <div style="background-color:#fffaf0;">
| + | |
| - | == Publication Abstract from PubMed ==
| + | |
| - | Complexin prevents SNAREs from releasing neurotransmitters until an action potential arrives at the synapse. To understand the mechanism for this inhibition, we determined the structure of complexin bound to a mimetic of a prefusion SNAREpin lacking the portion of the v-SNARE that zippers last to trigger fusion. The 'central helix' of complexin is anchored to one SNARE complex, while its 'accessory helix' extends away at ~45 degrees and bridges to a second complex, occupying the vacant v-SNARE binding site to inhibit fusion. We expected the accessory helix to compete with the v-SNARE for t-SNARE binding but found instead that the interaction occurs intermolecularly. Thus, complexin organizes the SNAREs into a zigzag topology that, when interposed between the vesicle and plasma membranes, is incompatible with fusion.
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| - | | + | |
| - | Complexin cross-links prefusion SNAREs into a zigzag array.,Kummel D, Krishnakumar SS, Radoff DT, Li F, Giraudo CG, Pincet F, Rothman JE, Reinisch KM Nat Struct Mol Biol. 2011 Jul 24;18(8):927-33. doi: 10.1038/nsmb.2101. PMID:21785414<ref>PMID:21785414</ref>
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| - | | + | |
| - | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br>
| + | |
| - | </div>
| + | |
| - | <div class="pdbe-citations 3rk2" style="background-color:#fffaf0;"></div>
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| | | | |
| | ==See Also== | | ==See Also== |
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| | *[[Syntaxin 3D structures|Syntaxin 3D structures]] | | *[[Syntaxin 3D structures|Syntaxin 3D structures]] |
| | *[[Vesicle-associated membrane protein|Vesicle-associated membrane protein]] | | *[[Vesicle-associated membrane protein|Vesicle-associated membrane protein]] |
| - | == References == | |
| - | <references/> | |
| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Buffalo rat]] | + | [[Category: Homo sapiens]] |
| - | [[Category: Human]]
| + | |
| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| - | [[Category: Kuemmel, D]] | + | [[Category: Rattus norvegicus]] |
| - | [[Category: Reinisch, K M]] | + | [[Category: Kuemmel D]] |
| - | [[Category: Membrane fusion]] | + | [[Category: Reinisch KM]] |
| - | [[Category: Membrane protein-exocytosis complex]]
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| - | [[Category: Snare protein]]
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