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J Bacteriol. 2010 Jul;192(13):3329-36. doi: 10.1128/JB.01352-09. Epub 2010 Apr 23.

YieJ (CbrC) mediates CreBC-dependent colicin E2 tolerance in Escherichia coli.

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  • 1Department of Cellular and Molecular Medicine, University of Bristol, School of Medical Sciences, University Walk, Bristol BS8 1TD, United Kingdom.


Colicin E2-tolerant (known as Cet2) Escherichia coli K-12 mutants overproduce an inner membrane protein, CreD, which is believed to cause the Cet2 phenotype. Here, we show that overproduction of CreD in a Cet2 strain results from hyperactivation of the CreBC two-component regulator, but CreD overproduction is not responsible for the Cet2 phenotype. Through microarray analysis and gene knockout and overexpression studies, we show that overexpression of another CreBC-regulated gene, yieJ (also known as cbrC), causes the Cet2 phenotype.

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