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==High resolution crystal structure of FraC in the monomeric form== | |||
<StructureSection load='3vwi' size='340' side='right' caption='[[3vwi]], [[Resolution|resolution]] 1.70Å' scene=''> | |||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[3vwi]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/Actinia_fragacea Actinia fragacea]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3VWI OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3VWI 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>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=NH4:AMMONIUM+ION'>NH4</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr> | |||
<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[3lim|3lim]]</td></tr> | |||
<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">FraC ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=396334 Actinia fragacea])</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=3vwi FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3vwi OCA], [http://www.rcsb.org/pdb/explore.do?structureId=3vwi RCSB], [http://www.ebi.ac.uk/pdbsum/3vwi PDBsum]</span></td></tr> | |||
</table> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
Pore-forming toxins (PFTs) are proteins that are secreted as soluble molecules and are inserted into membranes to form oligomeric transmembrane pores. In this paper, we report the crystal structure of Fragaceatoxin C (FraC), a PFT isolated from the sea anemone Actinia fragacea, at 1.8 A resolution. It consists of a crown-shaped nonamer with an external diameter of about 11.0 nm and an internal diameter of approximately 5.0 nm. Cryoelectron microscopy studies of FraC in lipid bilayers reveal the pore structure that traverses the membrane. The shape and dimensions of the crystallographic oligomer are fully consistent with the membrane pore. The FraC structure provides insight into the interactions governing the assembly process and suggests the structural changes that allow for membrane insertion. We propose a nonameric pore model that spans the membrane by forming a lipid-free alpha-helical bundle pore. | |||
Structural insights into the oligomerization and architecture of eukaryotic membrane pore-forming toxins.,Mechaly AE, Bellomio A, Gil-Carton D, Morante K, Valle M, Gonzalez-Manas JM, Guerin DM Structure. 2011 Feb 9;19(2):181-91. PMID:21300287<ref>PMID:21300287</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
== References == | |||
== | <references/> | ||
__TOC__ | |||
</StructureSection> | |||
[[Category: Actinia fragacea]] | [[Category: Actinia fragacea]] | ||
[[Category: Caaveiro, J M.M | [[Category: Caaveiro, J M.M]] | ||
[[Category: Gonzalez-Manas, J M | [[Category: Gonzalez-Manas, J M]] | ||
[[Category: Morante, K | [[Category: Morante, K]] | ||
[[Category: Tanaka, K | [[Category: Tanaka, K]] | ||
[[Category: Tsumoto, K | [[Category: Tsumoto, K]] | ||
[[Category: Actinoporin]] | [[Category: Actinoporin]] | ||
[[Category: Amphipathic alpha-helix]] | [[Category: Amphipathic alpha-helix]] | ||
Revision as of 09:56, 21 December 2014
High resolution crystal structure of FraC in the monomeric formHigh resolution crystal structure of FraC in the monomeric form
Structural highlights
Publication Abstract from PubMedPore-forming toxins (PFTs) are proteins that are secreted as soluble molecules and are inserted into membranes to form oligomeric transmembrane pores. In this paper, we report the crystal structure of Fragaceatoxin C (FraC), a PFT isolated from the sea anemone Actinia fragacea, at 1.8 A resolution. It consists of a crown-shaped nonamer with an external diameter of about 11.0 nm and an internal diameter of approximately 5.0 nm. Cryoelectron microscopy studies of FraC in lipid bilayers reveal the pore structure that traverses the membrane. The shape and dimensions of the crystallographic oligomer are fully consistent with the membrane pore. The FraC structure provides insight into the interactions governing the assembly process and suggests the structural changes that allow for membrane insertion. We propose a nonameric pore model that spans the membrane by forming a lipid-free alpha-helical bundle pore. Structural insights into the oligomerization and architecture of eukaryotic membrane pore-forming toxins.,Mechaly AE, Bellomio A, Gil-Carton D, Morante K, Valle M, Gonzalez-Manas JM, Guerin DM Structure. 2011 Feb 9;19(2):181-91. PMID:21300287[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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