This old version of Proteopedia is provided for student assignments while the new version is undergoing repairs. Content and edits done in this old version of Proteopedia after March 1, 2026 will eventually be lost when it is retired in about June of 2026.

Apply for new accounts at the new Proteopedia. Your logins will work in both the old and new versions.

3vwi

From Proteopedia

(Difference between revisions)

Jump to: navigation, search

Revision as of 11:23, 4 March 2015

High resolution crystal structure of FraC in the monomeric form

Structural highlights

3vwi is a 4 chain structure with sequence from Actfr. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	, , ,
Related:	3lim
Gene:	FraC (ACTFR)
Resources:	FirstGlance, OCA, RCSB, PDBsum

Function

[ACTPC_ACTFR] Pore-forming protein that forms cations-selective hydrophilic pores of around 1 nm and causes cardiac stimulation and hemolysis. Pore formation is a multi-step process that involves specific recognition of membrane sphingomyelin (but neither cholesterol nor phosphatidylcholine) using aromatic rich region and adjacent phosphocholine (POC) binding site, firm binding to the membrane (mainly driven by hydrophobic interactions) accompanied by the transfer of the N-terminal region to the lipid-water interface and finally pore formation after oligomerization of several monomers.^[1]

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^[2]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Bellomio A, Morante K, Barlic A, Gutierrez-Aguirre I, Viguera AR, Gonzalez-Manas JM. Purification, cloning and characterization of fragaceatoxin C, a novel actinoporin from the sea anemone Actinia fragacea. Toxicon. 2009 Nov;54(6):869-80. doi: 10.1016/j.toxicon.2009.06.022. Epub 2009 Jun, 27. PMID:19563820 doi:10.1016/j.toxicon.2009.06.022
↑ Mechaly AE, Bellomio A, Gil-Carton D, Morante K, Valle M, Gonzalez-Manas JM, Guerin DM. Structural insights into the oligomerization and architecture of eukaryotic membrane pore-forming toxins. Structure. 2011 Feb 9;19(2):181-91. PMID:21300287 doi:10.1016/j.str.2010.11.013

1 Structural highlights
2 Function
3 Publication Abstract from PubMed
4 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/3vwi"

@@ Line 2: / Line 2: @@
 <StructureSection load='3vwi' size='340' side='right' caption='[[3vwi]], [[Resolution|resolution]] 1.70&Aring;' 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>
+<table><tr><td colspan='2'>[[3vwi]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/Actfr Actfr]. 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='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 ACTFR])</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>
@@ Line 22: / Line 22: @@
 __TOC__
 </StructureSection>
-[[Category: Actinia fragacea]]
+[[Category: Actfr]]
 [[Category: Caaveiro, J M.M]]
 [[Category: Gonzalez-Manas, J M]]

3vwi

From Proteopedia

Revision as of 11:23, 4 March 2015

High resolution crystal structure of FraC in the monomeric form

Structural highlights

Function

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

Personal tools

Navigation

Search

Toolbox