traJ independence in expression of traT on F.
Studies of F plasmids in the same cell as a transfer-repressed IncFII R plasmid showed a 100 to 1,000-fold decrease in transfer and a 75-fold decrease in surface exclusion, but no detectable change was shown in the amount of TraTp synthesized. Moreover, a mutation in traJ on F which caused a 10(4)-fold reduction in transfer caused only a 3.6-fold decrease in TraTp. These two findings suggest that a significant amount of traT expression on F is independent of traJ. Furthermore, we showed, using immunoprecipitation of TraTp, that normal amounts of this protein could be present in the cell without producing normal levels of surface exclusion.
15 references, click to expand
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The transcriptional control of fertility in F-like plasmids.J Mol Biol. 1977 May 5;112(1):141-8 PMID: 881726
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