The projection structure of Perfringolysin O (Clostridium perfringens θ‐toxin)

FEBS Letters

Thelestam, Monica¹  Hebert, Hans²  Olofsson, Anders² 

[1] Department of Bacteriology, Karolinska Institutet, S-104 01 Stockholm, Sweden;Center for Structural Biochemistry. Karolinska Institutet, NOVUM, S-141 57 Huddinge, Sweden

关键词: Perfringolysin O;    Electron microscopy;    Image processing;   

DOI  :  10.1016/0014-5793(93)80050-5

学科分类：生物化学/生物物理

来源: John Wiley & Sons Ltd.

【 摘 要 】

The cytolysin Perfringolysin O was applied to lipid layers and the obtained ring-shaped oligomers analyzed by electron microscopy and image processing. The final result shows the periodic repeat of 2.4 nm along the outer rim of the ring. The asymmetric protein unit, corresponding to one monomer, spans the ring from the convex to the concave surface. It shows a clear protein peak close to the outer radius and less density in the middle of the oligomer. The number of monomers in the average ring is 50, and the inner radius of the aggregate is approximately 15 nm.

【 授权许可】

Unknown