Lysis of Bacterial Protoplasts and Spheroplasts by Staphylococcal α-Toxin and Streptolysin S

Abstract
Bernheimer, AlanW. (New York University School of Medicine, New York, N.Y.),and Lois L. Schwartz. Lysis of bacterial protoplasts and spheroplasts by staphylococcal α-toxin and streptolysin S. J. Bacteriol.89:1387–1392. 1965.—Protoplasts ofBacillus megaterium, Sarcina lutea, andStreptococcus pyogenes, and spheroplasts ofEscherichia coliwere lysed by staphylococcal α-toxin, whereas spheroplasts ofVibrio metschnikoviiandV. commawere not. In the spectrum of its lytic action, streptolysin S qualitatively resembled staphylococcal α-toxin except for failure to lyseS. pyogenesprotoplasts. In contrast to the two foregoing agents, streptolysin O did not lyse protoplasts and spheroplasts. The observations are interpreted in relation to similarities and differences in lipid composition of bacterial and mammalian cell membranes.

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