1O72

Crystal structure of the water-soluble state of the pore-forming cytolysin Sticholysin II complexed with phosphorylcholine


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.41 Å
  • R-Value Free: 0.269 
  • R-Value Work: 0.212 
  • R-Value Observed: 0.212 

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This is version 1.2 of the entry. See complete history


Literature

Crystal and Electron Microscopy Structures of Sticholysin II Actinoporin Reveal Insights Into the Mechanism of Membrane Pore Formation

Mancheno, J.M.Martin-Benito, J.Martinez-Ripoll, M.Gavilanes, J.G.Hermoso, J.A.

(2003) Structure 11: 1319

  • DOI: 10.1016/j.str.2003.09.019
  • Primary Citation of Related Structures:  
    1O72, 1O71, 1GWY

  • PubMed Abstract: 
  • Sticholysin II (StnII) is a pore-forming protein (PFP) produced by the sea anemone Stichodactyla helianthus. We found out that StnII exists in a monomeric soluble state but forms tetramers in the presence of a lipidic interface. Both structures have been independently determined at 1 ...

    Sticholysin II (StnII) is a pore-forming protein (PFP) produced by the sea anemone Stichodactyla helianthus. We found out that StnII exists in a monomeric soluble state but forms tetramers in the presence of a lipidic interface. Both structures have been independently determined at 1.7 A and 18 A resolution, respectively, by using X-ray crystallography and electron microscopy of two-dimensional crystals. Besides, the structure of soluble StnII complexed with phosphocholine, determined at 2.4 A resolution, reveals a phospholipid headgroup binding site, which is located in a region with an unusually high abundance of aromatic residues. Fitting of the atomic model into the electron microscopy density envelope suggests that while the beta sandwich structure of the protein remains intact upon oligomerization, the N-terminal region and a flexible and highly basic loop undergo significant conformational changes. These results provide the structural basis for the membrane recognition step of actinoporins and unexpected insights into the oligomerization step.


    Organizational Affiliation

    Grupo de Cristalografía Macromolecular y Biología Estructural, Instituto Rocasolano, CSIC, Serrano 119, 28006 Madrid, Spain.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
STICHOLYSIN IIA, B175Stichodactyla helianthusMutation(s): 0 
UniProt
Find proteins for P07845 (Stichodactyla helianthus)
Explore P07845 
Go to UniProtKB:  P07845
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PC (Subject of Investigation/LOI)
Query on PC

Download Ideal Coordinates CCD File 
C [auth A], D [auth B]PHOSPHOCHOLINE
C5 H15 N O4 P
YHHSONZFOIEMCP-UHFFFAOYSA-O
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.41 Å
  • R-Value Free: 0.269 
  • R-Value Work: 0.212 
  • R-Value Observed: 0.212 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 32.63α = 90
b = 43.25β = 90.73
c = 119.52γ = 90
Software Package:
Software NamePurpose
CNSrefinement
MOSFLMdata reduction

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2003-11-13
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance