A mutation which affects both the specificity of PtsG sugar transport and the regulation of ptsG expression by Mlc in Escherichia coli

Article Abstract:

An Escherichia coli mutation which affects specificity of PtsG sugar transport and regulation of ptsG expression by Mlc has been studied. It has been shown that the IIC mutation is the cause of both the effect on sugar specificity an regulation. Analysis of the two mutations individually present on plasmids was used in the study.

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Analysis of sigma(super.54)-dependent genes in Enterococus faecalis: a mannose PTS permease (EII(super.Man)) is involved in sensitivity to a bacteriocin, mesentericin Y105

Article Abstract:

Analysis of sigma(super.54)-dependent genes in Enterococus faecalis has been undertaken. A mannose PTS permease (EII(super.Man)) has been found to be involved in sensitivity to mesentericin Y105, a bacteriocin. It may be that MptD is responsible for the targeting specificity through an interaction between its additional domain and mesentericin Y105. EII is a PTS permease active in transport and accompanying phosphorylation of sugars. EII(sub.t)(super.Man) is clearly involved in susceptibility to mesentericin Y105 and may be its receptor on the E. faecalis surface.

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Suppression of thermosensitive peptidyl-tRNA hydrolase mutation in Escherichia coli by gene duplication

Article Abstract:

Thermosensitive peptidyl-tRNA hydrolase (Pth) mutation and its suppression in Escherichia coli by gene duplication have been studied. In some conditions of selection and in some strain backgrounds high rates of reversion to thermoresistance exist. High rates of reversion are caused by duplication of the pth(ts) gene.

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