Biological Assembly 1  

 3D View: Structure | Electron Density

Standalone Viewers  
Protein Workshop | Ligand Explorer

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 19696.24 
• Atom Count: 1434 
• Residue Count: 179 
• Unique protein chains: 1

4WDC

High-resolution crystal structure of water-soluble FraC (mutation F16P)

• DOI: 10.2210/pdb4WDC/pdb

• Classification: TOXIN
• Organism(s): Actinia fragacea
• Expression System: Escherichia coli
• Mutation(s): 1 


• Deposited: 2014-09-08 Released: 2015-03-18 
• Deposition Author(s): Caaveiro, J.M.M., Morante, K., Tsumoto, K.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.29 Å
• R-Value Free: 0.151 
• R-Value Work: 0.119 

Literature

A Pore-Forming Toxin Requires a Specific Residue for Its Activity in Membranes with Particular Physicochemical Properties

Morante, K., Caaveiro, J.M., Tanaka, K., Gonzalez-Manas, J.M., Tsumoto, K.

(2015) J.Biol.Chem. 290: 10850-10861

• PubMed: 25759390 
• DOI: 10.1074/jbc.M114.615211


• PubMed Abstract: 
  

The physicochemical landscape of the bilayer modulates membrane protein function. Actinoporins are a family of potent hemolytic proteins from sea anemones acting at the membrane level. This family of cytolysins preferentially binds to target membranes containing sphingomyelin, where they form lytic pores giving rise to cell death. Although the cytolytic activity of the actinoporin fragaceatoxin C (FraC) is sensitive to vesicles made of various lipid compositions, it is far from clear how this toxin adjusts its mechanism of action to a broad range of physiochemical landscapes. Herein, we show that the conserved residue Phe-16 of FraC is critical for pore formation in cholesterol-rich membranes such as those of red blood cells. The interaction of a panel of muteins of Phe-16 with model membranes composed of raft-like lipid domains is inactivated in cholesterol-rich membranes but not in cholesterol-depleted membranes. These results indicate that actinoporins recognize different membrane environments, resulting in a wider repertoire of susceptible target membranes (and preys) for sea anemones. In addition, this study has unveiled promising candidates for the development of protein-based biosensors highly sensitive to the concentration of cholesterol within the membrane.

---

Organizational Affiliation: 

From the Department of Bioengineering, Graduate School of Engineering and the Department of Biochemistry and Molecular Biology, University of the Basque Country, 48940 Leioa, Spain, and.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
Fragaceatoxin C	A	179	Actinia fragacea	Mutation(s): 1
Find proteins for B9W5G6 (Actinia fragacea) Go to UniProtKB:  B9W5G6

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.29 Å
• R-Value Free: 0.151 
• R-Value Work: 0.119 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length (Å)	Angle (°)
a = 42.830	α = 90.00
b = 61.480	β = 90.00
c = 66.810	γ = 90.00

Software Package:

Software Name	Purpose
REFMAC	refinement

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2014-09-08 
• Released Date: 2015-03-18 
• Deposition Author(s): Caaveiro, J.M.M., Morante, K., Tsumoto, K.

Revision History 

• Version 1.0: 2015-03-18
  Type: Initial release
• Version 1.1: 2015-04-08
  Type: Database references
• Version 1.2: 2015-05-06
  Type: Database references