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 
  • R-Value Observed: 0.206 

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:  
    3ZWJ, 3ZWG

  • 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 oligomeric prepore conformation ...

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



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
FRAGACEATOXIN C
A, B, C, D, E, F, G, H
A, B, C, D, E, F, G, H, I
179Actinia fragaceaMutation(s): 0 
Membrane Entity: Yes 
UniProt
Find proteins for B9W5G6 (Actinia fragacea)
Explore B9W5G6 
Go to UniProtKB:  B9W5G6
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.37 Å
  • R-Value Free: 0.215 
  • R-Value Work: 0.192 
  • R-Value Observed: 0.206 
  • Space Group: P 3 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 117.969α = 90
b = 117.969β = 90
c = 256.01γ = 120
Software Package:
Software NamePurpose
PHENIXrefinement
MOSFLMdata reduction
SCALAdata scaling
PHASERphasing

Structure Validation

View Full Validation Report




Entry History 

Deposition Data

Revision History  (Full details and data files)

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