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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Novel gene members in the Pho regulon of Escherichia coli.

The transcriptome profiles of the wild-type and the phoB mutant strains were compared at the time point showing the highest expression levels of the phoB and phoR genes under a P-limiting condition. Among the 18 new putative genes that were found to be under the control of the PhoB transcriptional regulator, five genes that contain the consensus Pho box were identified by sequence analysis. A reporter gene assay was carried out by fusing the upstream regions of these genes to the promoterless enhanced green fluorescent protein gene, followed by expression. It was found that the expressions of the amn ( AMP nucleosidase), yibD (metal ion stress response gene) and ytfK (hypothetical protein) genes were activated by PhoB. These results indicate the additional roles of PhoB as a global regulator.[1]


  1. Novel gene members in the Pho regulon of Escherichia coli. Baek, J.H., Lee, S.Y. FEMS Microbiol. Lett. (2006) [Pubmed]
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