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| | <StructureSection load='4cca' size='340' side='right'caption='[[4cca]], [[Resolution|resolution]] 2.60Å' scene=''> | | <StructureSection load='4cca' size='340' side='right'caption='[[4cca]], [[Resolution|resolution]] 2.60Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[4cca]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Human Human]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4CCA OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4CCA FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[4cca]] is a 1 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=4CCA OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4CCA FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene></td></tr> | + | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CL:CHLORIDE+ION'>CL</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=4cca FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4cca OCA], [http://pdbe.org/4cca PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=4cca RCSB], [http://www.ebi.ac.uk/pdbsum/4cca PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=4cca 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=4cca FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4cca OCA], [https://pdbe.org/4cca PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4cca RCSB], [https://www.ebi.ac.uk/pdbsum/4cca PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4cca ProSAT]</span></td></tr> |
| | </table> | | </table> |
| | == Disease == | | == Disease == |
| - | [[http://www.uniprot.org/uniprot/STXB2_HUMAN STXB2_HUMAN]] Familial hemophagocytic lymphohistiocytosis. The disease is caused by mutations affecting the gene represented in this entry. | + | [[https://www.uniprot.org/uniprot/STXB2_HUMAN STXB2_HUMAN]] Familial hemophagocytic lymphohistiocytosis. The disease is caused by mutations affecting the gene represented in this entry. |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/STXB2_HUMAN STXB2_HUMAN]] Involved in intracellular vesicle trafficking and vesicle fusion with membranes. Contributes to the granule exocytosis machinery through interaction with soluble N-ethylmaleimide-sensitive factor attachment protein receptor (SNARE) proteins that regulate membrane fusion. Regulates cytotoxic granule exocytosis in natural killer (NK) cells.<ref>PMID:19804848</ref> <ref>PMID:19884660</ref> | + | [[https://www.uniprot.org/uniprot/STXB2_HUMAN STXB2_HUMAN]] Involved in intracellular vesicle trafficking and vesicle fusion with membranes. Contributes to the granule exocytosis machinery through interaction with soluble N-ethylmaleimide-sensitive factor attachment protein receptor (SNARE) proteins that regulate membrane fusion. Regulates cytotoxic granule exocytosis in natural killer (NK) cells.<ref>PMID:19804848</ref> <ref>PMID:19884660</ref> |
| - | <div style="background-color:#fffaf0;">
| + | |
| - | == Publication Abstract from PubMed ==
| + | |
| - | Mutations in either syntaxin 11 (Stx11) or Munc18-2 abolish cytotoxic T lymphocytes (CTL) and natural killer cell (NK) cytotoxicity, and give rise to familial hemophagocytic lymphohistiocytosis (FHL4 or FHL5, respectively). Although Munc18-2 is known to interact with Stx11, little is known about the molecular mechanisms governing the specificity of this interaction or how in vitro IL-2 activation leads to compensation of CTL and NK cytotoxicity. To understand how mutations in Munc18-2 give rise to disease, we have solved the structure of human Munc18-2 at 2.6 A resolution and mapped 18 point mutations. The four surface mutations identified (R39P, L130S, E132A, P334L) map exclusively to the predicted syntaxin and soluble N-ethylmaleimide-sensitive factor accessory protein receptor binding sites of Munc18-2. We find that Munc18-2 binds the N-terminal peptide of Stx11 with a approximately 20-fold higher affinity than Stx3, suggesting a potential role in selective binding. Upon IL-2 activation, levels of Stx3 are increased, favoring Munc18-2 binding when Stx11 is absent. Similarly, Munc18-1, expressed in IL-2-activated CTL, is capable of binding Stx11. These findings provide potential explanations for restoration of Munc18-Stx function and cytotoxicity in IL-2-activated cells.
| + | |
| - | | + | |
| - | Syntaxin binding mechanism and disease-causing mutations in Munc18-2.,Hackmann Y, Graham SC, Ehl S, Honing S, Lehmberg K, Arico M, Owen DJ, Griffiths GM Proc Natl Acad Sci U S A. 2013 Nov 5. PMID:24194549<ref>PMID:24194549</ref>
| + | |
| - | | + | |
| - | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br>
| + | |
| - | </div>
| + | |
| - | <div class="pdbe-citations 4cca" style="background-color:#fffaf0;"></div>
| + | |
| | | | |
| | ==See Also== | | ==See Also== |
| Line 27: |
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| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Human]] | + | [[Category: Homo sapiens]] |
| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| - | [[Category: Arico, M]] | + | [[Category: Arico M]] |
| - | [[Category: Ehl, S]] | + | [[Category: Ehl S]] |
| - | [[Category: Graham, S C]] | + | [[Category: Graham SC]] |
| - | [[Category: Griffiths, G G]] | + | [[Category: Griffiths GG]] |
| - | [[Category: Hackmann, Y]] | + | [[Category: Hackmann Y]] |
| - | [[Category: Hoening, S]] | + | [[Category: Hoening S]] |
| - | [[Category: Lehmberg, K]] | + | [[Category: Lehmberg K]] |
| - | [[Category: Owen, D J]] | + | [[Category: Owen DJ]] |
| - | [[Category: Protein transport]]
| + | |
| Structural highlights
Disease
[STXB2_HUMAN] Familial hemophagocytic lymphohistiocytosis. The disease is caused by mutations affecting the gene represented in this entry.
Function
[STXB2_HUMAN] Involved in intracellular vesicle trafficking and vesicle fusion with membranes. Contributes to the granule exocytosis machinery through interaction with soluble N-ethylmaleimide-sensitive factor attachment protein receptor (SNARE) proteins that regulate membrane fusion. Regulates cytotoxic granule exocytosis in natural killer (NK) cells.[1] [2]
See Also
References
- ↑ zur Stadt U, Rohr J, Seifert W, Koch F, Grieve S, Pagel J, Strauss J, Kasper B, Nurnberg G, Becker C, Maul-Pavicic A, Beutel K, Janka G, Griffiths G, Ehl S, Hennies HC. Familial hemophagocytic lymphohistiocytosis type 5 (FHL-5) is caused by mutations in Munc18-2 and impaired binding to syntaxin 11. Am J Hum Genet. 2009 Oct;85(4):482-92. doi: 10.1016/j.ajhg.2009.09.005. PMID:19804848 doi:http://dx.doi.org/10.1016/j.ajhg.2009.09.005
- ↑ Cote M, Menager MM, Burgess A, Mahlaoui N, Picard C, Schaffner C, Al-Manjomi F, Al-Harbi M, Alangari A, Le Deist F, Gennery AR, Prince N, Cariou A, Nitschke P, Blank U, El-Ghazali G, Menasche G, Latour S, Fischer A, de Saint Basile G. Munc18-2 deficiency causes familial hemophagocytic lymphohistiocytosis type 5 and impairs cytotoxic granule exocytosis in patient NK cells. J Clin Invest. 2009 Dec;119(12):3765-73. doi: 10.1172/JCI40732. Epub 2009 Nov 2. PMID:19884660 doi:http://dx.doi.org/10.1172/JCI40732
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