The Escherichia coli tppB ( ydgR ) Gene Represents a New Class of OmpR-Regulated Genes

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Abstract
The EnvZ/OmpR two-component regulatory system plays a critical role in the Escherichia coli stress response. In this study, we examined the expression of a new OmpR-regulated gene, ydgR . Our results indicate that ydgR is equivalent to the Salmonella enterica serovar Typhimurium tppB gene and represents a new class of OmpR-regulated genes.