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| | <StructureSection load='3puj' size='340' side='right'caption='[[3puj]], [[Resolution|resolution]] 3.31Å' scene=''> | | <StructureSection load='3puj' size='340' side='right'caption='[[3puj]], [[Resolution|resolution]] 3.31Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[3puj]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Buffalo_rat Buffalo rat]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3PUJ OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3PUJ FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[3puj]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Mus_musculus Mus musculus] 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=3PUJ OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3PUJ FirstGlance]. <br> |
| - | </td></tr><tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">Stxbp1, Unc18a ([https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=10116 Buffalo rat])</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]] 3.313Å</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=3puj FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3puj OCA], [https://pdbe.org/3puj PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3puj RCSB], [https://www.ebi.ac.uk/pdbsum/3puj PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3puj 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=3puj FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3puj OCA], [https://pdbe.org/3puj PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3puj RCSB], [https://www.ebi.ac.uk/pdbsum/3puj PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3puj ProSAT]</span></td></tr> |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[https://www.uniprot.org/uniprot/STXB1_RAT STXB1_RAT]] May participate in the regulation of synaptic vesicle docking and fusion, possibly through interaction with GTP-binding proteins. Essential for neurotransmission and binds syntaxin, a component of the synaptic vesicle fusion machinery probably in a 1:1 ratio. Can interact with syntaxins 1, 2, and 3 but not syntaxin 4. May play a role in determining the specificity of intracellular fusion reactions. [[https://www.uniprot.org/uniprot/STX4_MOUSE STX4_MOUSE]] Plasma membrane t-SNARE that mediates docking of transport vesicles. Necessary for the translocation of SLC2A4 from intracellular vesicles to the plasma membrane. Together with STXB3 and VAMP2, may also play a role in docking/fusion of intracellular GLUT4-containing vesicles with the cell surface in adipocytes and in docking of synaptic vesicles at presynaptic active zones.<ref>PMID:9045631</ref> <ref>PMID:10394363</ref> <ref>PMID:18827011</ref>
| + | [https://www.uniprot.org/uniprot/STXB1_RAT STXB1_RAT] May participate in the regulation of synaptic vesicle docking and fusion, possibly through interaction with GTP-binding proteins. Essential for neurotransmission and binds syntaxin, a component of the synaptic vesicle fusion machinery probably in a 1:1 ratio. Can interact with syntaxins 1, 2, and 3 but not syntaxin 4. May play a role in determining the specificity of intracellular fusion reactions. |
| | <div style="background-color:#fffaf0;"> | | <div style="background-color:#fffaf0;"> |
| | == Publication Abstract from PubMed == | | == Publication Abstract from PubMed == |
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| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Buffalo rat]] | |
| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| - | [[Category: Christie, M P]] | + | [[Category: Mus musculus]] |
| - | [[Category: Collins, B M]] | + | [[Category: Rattus norvegicus]] |
| - | [[Category: Hu, S H]] | + | [[Category: Christie MP]] |
| - | [[Category: Jarrott, R]] | + | [[Category: Collins BM]] |
| - | [[Category: Latham, C F]] | + | [[Category: Hu S-H]] |
| - | [[Category: Lua, L H.L]]
| + | [[Category: Jarrott R]] |
| - | [[Category: Martin, J L]] | + | [[Category: Latham CF]] |
| - | [[Category: Saez, N J]] | + | [[Category: Lua LHL]] |
| - | [[Category: Endocytosis-exocytosis complex]] | + | [[Category: Martin JL]] |
| - | [[Category: Membrane trafficking]] | + | [[Category: Saez NJ]] |
| - | [[Category: Sm protein]] | + | |
| - | [[Category: Snare protein]]
| + | |
| - | [[Category: Syntaxin]]
| + | |
| - | [[Category: Syntaxin binding protein]]
| + | |
| Structural highlights
Function
STXB1_RAT May participate in the regulation of synaptic vesicle docking and fusion, possibly through interaction with GTP-binding proteins. Essential for neurotransmission and binds syntaxin, a component of the synaptic vesicle fusion machinery probably in a 1:1 ratio. Can interact with syntaxins 1, 2, and 3 but not syntaxin 4. May play a role in determining the specificity of intracellular fusion reactions.
Publication Abstract from PubMed
Munc18-1 and Syntaxin1 are essential proteins for SNARE-mediated neurotransmission. Munc18-1 participates in synaptic vesicle fusion via dual roles: as a docking/chaperone protein by binding closed Syntaxin1, and as a fusion protein that binds SNARE complexes in a Syntaxin1 N-peptide dependent manner. The two roles are associated with a closed-open Syntaxin1 conformational transition. Here, we show that Syntaxin N-peptide binding to Munc18-1 is not highly selective, suggesting that other parts of the SNARE complex are involved in binding to Munc18-1. We also find that Syntaxin1, with an N peptide and a physically anchored C terminus, binds to Munc18-1 and that this complex can participate in SNARE complex formation. We report a Munc18-1-N-peptide crystal structure that, together with other data, reveals how Munc18-1 might transit from a conformation that binds closed Syntaxin1 to one that may be compatible with binding open Syntaxin1 and SNARE complexes. Our results suggest the possibility that structural transitions occur in both Munc18-1 and Syntaxin1 during their binary interaction. We hypothesize that Munc18-1 domain 3a undergoes a conformational change that may allow coiled-coil interactions with SNARE complexes.
Possible roles for Munc18-1 domain 3a and Syntaxin1 N-peptide and C-terminal anchor in SNARE complex formation.,Hu SH, Christie MP, Saez NJ, Latham CF, Jarrott R, Lua LH, Collins BM, Martin JL Proc Natl Acad Sci U S A. 2010 Dec 30. PMID:21193638[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Hu SH, Christie MP, Saez NJ, Latham CF, Jarrott R, Lua LH, Collins BM, Martin JL. Possible roles for Munc18-1 domain 3a and Syntaxin1 N-peptide and C-terminal anchor in SNARE complex formation. Proc Natl Acad Sci U S A. 2010 Dec 30. PMID:21193638 doi:10.1073/pnas.0914906108
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