Ferber D M, Fowler J M, Brubaker R R
J Bacteriol. 1981 May;146(2):506-11. doi: 10.1128/jb.146.2.506-511.1981.
The universal colicin-indicator strain Escherichia coli phi, unlike E. coli strain K-12, is sensitive to pesticin, a bacteriocin produced by wild-type Yersinia pestis. Eleven distinct phenotypes of E. coli phi mutants were obtained by selection for insensitivity to pesticin, group B colicins, the group A colicin S4, or coliphage T5. Representative isolates from eight of these classes closely resembled resistant receptor mutants (Cir-, Fep-, and TonA-) or tolerant mutants (TonB-, ExbB-, ExbC-, Ivt-, and Cmt-) described in Escherichia coli K-12. The remainder were unique; of these, one resembled TonB- but was also tolerant to colicin S4 (TonB/S4-), and the others exhibited specific resistance to either colicin S4 (Sfr-) or to pesticin (Psr-). All receptor mutants except Psr- remained sensitive to pesticin, whereas TonB/S4, TonB-, ExbB-, and ExbC- isolates were highly tolerant to this bacteriocin.
通用的大肠杆菌噬菌素指示菌株大肠杆菌 phi 与大肠杆菌 K - 12 菌株不同,它对鼠疫菌素敏感,鼠疫菌素是野生型鼠疫耶尔森菌产生的一种细菌素。通过筛选对鼠疫菌素、B 组大肠杆菌素、A 组大肠杆菌素 S4 或噬菌体 T5 不敏感,获得了 11 种不同表型的大肠杆菌 phi 突变体。这些类别中的 8 个类别的代表性分离株与大肠杆菌 K - 12 中描述的抗性受体突变体(Cir -、Fep - 和 TonA -)或耐受性突变体(TonB -、ExbB -、ExbC -、Ivt - 和 Cmt -)非常相似。其余的则是独特的;其中一个类似于 TonB - 但也对大肠杆菌素 S4 具有耐受性(TonB/S4 -),其他的则对大肠杆菌素 S4(Sfr -)或鼠疫菌素(Psr -)表现出特异性抗性。除 Psr - 外,所有受体突变体对鼠疫菌素仍敏感,而 TonB/S4、TonB -、ExbB - 和 ExbC - 分离株对这种细菌素具有高度耐受性。