3ZWJ

CRYSTAL STRUCTURE OF THE PORE-FORMING TOXIN FRAC FROM ACTINIA FRAGACEA (Form 3)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.37 Å
  • R-Value Free: 0.215 
  • R-Value Work: 0.192 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Pores of the Toxin Frac Assemble Into 2D Hexagonal Clusters in Both Crystal Structures and Model Membranes.

Mechaly, A.E.Bellomio, A.Morante, K.Agirre, J.Gil-Carton, D.Valle, M.Gonzalez-Manas, J.M.Guerin, D.M.A.

(2012) J.Struct.Biol. 180: 312

  • DOI: 10.1016/j.jsb.2012.06.003
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The recent high-resolution structure of the toxin FraC derived from the sea anemone Actinia fragacea has provided new insight into the mechanism of pore formation by actinoporins. In this work, we report two new crystal forms of FraC in its oligomeri ...

    The recent high-resolution structure of the toxin FraC derived from the sea anemone Actinia fragacea has provided new insight into the mechanism of pore formation by actinoporins. In this work, we report two new crystal forms of FraC in its oligomeric prepore conformation. Together with the previously reported structure, these two new structures reveal that ring-like nonamers of the toxin assemble into compact two-dimensional hexagonal arrays. This supramolecular organization is maintained in different relative orientations adopted by the oligomers within the crystal layers. Analyses of the aggregation of FraC pores in both planar and curved (vesicles) model membranes show similar 2D hexagonal arrangements. Our observations support a model in which hexagonal pore-packing is a clustering mechanism that maximizes toxin-driven membrane damage in the target cell.


    Organizational Affiliation

    Unidad de BiofĂ­sica (Centro Mixto CSIC-UPV/EHU), B Sarriena S/N, Campus UPV/EHU Leioa, Leioa, Vizcaya, Spain.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
FRAGACEATOXIN C
A, B, C, D, E, F, G, H, I
179Actinia fragaceaMutation(s): 0 
Find proteins for B9W5G6 (Actinia fragacea)
Go to UniProtKB:  B9W5G6
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.37 Å
  • R-Value Free: 0.215 
  • R-Value Work: 0.192 
  • Space Group: P 3 2 1
Unit Cell:
Length (Å)Angle (°)
a = 117.969α = 90.00
b = 117.969β = 90.00
c = 256.010γ = 120.00
Software Package:
Software NamePurpose
PHASERphasing
MOSFLMdata reduction
PHENIXrefinement
SCALAdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-07-04
    Type: Initial release
  • Version 1.1: 2012-11-07
    Type: Database references