In:
Oxidative Medicine and Cellular Longevity, Hindawi Limited, Vol. 2016 ( 2016), p. 1-14
Kurzfassung:
Previous studies indicated that these genetic elements could be involved in the regulation of lysogenization and prophage induction processes. The effects were dramatic in Shiga toxin-converting phage Φ 24 B after treatment with oxidative stress-inducing agent, hydrogen peroxide, while they were less pronounced in bacteriophage λ and in both phages irradiated with UV. The hydrogen peroxide-caused prophage induction was found to be RecA-dependent. Importantly, in hydrogen peroxide-treated E. coli cells lysogenic for either λ or Φ 24 B , deletion of the exo-xis region resulted in a significant decrease in the levels of expression of the S.O.S. regulon genes. Moreover, under these conditions, a dramatic decrease in the levels of expression of phage genes crucial for lytic development (particularly xis, exo, N, cro, O, Q , and R ) could be observed in Φ 24 B -, but not in λ -bearing cells. We conclude that genes located in the exo-xis region are necessary for efficient expression of both host S.O.S regulon in lysogenic bacteria and regulatory genes of Shiga toxin-converting bacteriophage Φ 24 B .
Materialart:
Online-Ressource
ISSN:
1942-0900
,
1942-0994
DOI:
10.1155/2016/8453135
Sprache:
Englisch
Verlag:
Hindawi Limited
Publikationsdatum:
2016
ZDB Id:
2455981-7
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