4wvm: Difference between revisions
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The | ==Stonustoxin structure== | ||
<StructureSection load='4wvm' size='340' side='right'caption='[[4wvm]], [[Resolution|resolution]] 3.10Å' scene=''> | |||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[4wvm]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Synanceia_horrida Synanceia horrida]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4WVM OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4WVM 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]] 3.1Å</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=4wvm FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4wvm OCA], [https://pdbe.org/4wvm PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4wvm RCSB], [https://www.ebi.ac.uk/pdbsum/4wvm PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4wvm ProSAT]</span></td></tr> | |||
</table> | |||
== Function == | |||
[https://www.uniprot.org/uniprot/STXA_SYNHO STXA_SYNHO] This lethal (towards mice) toxin induces hemolytic activities due to its ability to form pores in the cell membrane, elicits potent hypotension which is endothelium-dependent and appears to be mediated by the nitric oxide pathway and activation of potassium channels, displays edema-inducing activities, increases vascular permeability, induces endothelium-dependent vasorelaxation of isolated rat aorta, induces platelet aggregation, is myotoxic and interferes irreversibly with neuromuscular function.<ref>PMID:1790672</ref> <ref>PMID:8079369</ref> <ref>PMID:9271089</ref> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
The lethal factor in stonefish venom is stonustoxin (SNTX), a heterodimeric cytolytic protein that induces cardiovascular collapse in humans and native predators. Here, using X-ray crystallography, we make the unexpected finding that SNTX is a pore-forming member of an ancient branch of the Membrane Attack Complex-Perforin/Cholesterol-Dependent Cytolysin (MACPF/CDC) superfamily. SNTX comprises two homologous subunits (alpha and beta), each of which comprises an N-terminal pore-forming MACPF/CDC domain, a central focal adhesion-targeting domain, a thioredoxin domain, and a C-terminal tripartite motif family-like PRY SPla and the RYanodine Receptor immune recognition domain. Crucially, the structure reveals that the two MACPF domains are in complex with one another and arranged into a stable early prepore-like assembly. These data provide long sought after near-atomic resolution insights into how MACPF/CDC proteins assemble into prepores on the surface of membranes. Furthermore, our analyses reveal that SNTX-like MACPF/CDCs are distributed throughout eukaryotic life and play a broader, possibly immune-related function outside venom. | |||
Stonefish toxin defines an ancient branch of the perforin-like superfamily.,Ellisdon AM, Reboul CF, Panjikar S, Huynh K, Oellig CA, Winter KL, Dunstone MA, Hodgson WC, Seymour J, Dearden PK, Tweten RK, Whisstock JC, McGowan S Proc Natl Acad Sci U S A. 2015 Dec 1. pii: 201507622. PMID:26627714<ref>PMID:26627714</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
<div class="pdbe-citations 4wvm" style="background-color:#fffaf0;"></div> | |||
==See Also== | |||
*[[Cytolysin 3D structures|Cytolysin 3D structures]] | |||
== References == | |||
<references/> | |||
__TOC__ | |||
</StructureSection> | |||
[[Category: Large Structures]] | |||
[[Category: Synanceia horrida]] | |||
[[Category: Ellisdon AM]] | |||
[[Category: McGowan S]] | |||
[[Category: Panjikar S]] | |||
[[Category: Whisstock JC]] | |||