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J Virol. 1986 July; 59(1): 103-111

Bacteriocinlike killing action of a temperate bacteriophage phiBA1 of Bacillus aneurinolyticus.

ABSTRACT

A new temperate phage, phiBA1, was isolated from Bacillus aneurinolyticus, phiBA1 had an icosahedral head with a diameter of about 70 nm and a tail about 20 nm long and contained a circularly permuted, linear duplex DNA of about 38 x 106 daltons. This phage showed two activities: bacteriocin-like killing activity against five strains of B. aneurinolyticus and normal temperate phage activity against three other strains. phiBA1 killed sensitive cells by a single-hit process. After adsorption of phiBA1 to cells sensitive to killing, the content of intracellular ATP increased for the first 5 min and then gradually decreased. Phage DNA injected into the cell immediately after infection was degraded rapidly. Killing was also caused by heavily UV-irradiated phiBA1. Killing-resistant mutants showed normal adsorption of phiBA1 and normal injection of the DNA with its instantaneous restriction. Our results indicate that the killing action of phiBA1 is different from the phenomenon of abortive infection and suggest that the killing might be caused by a proteinaceous component of phiBA1.

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