Abstract
SlyA is a newly transcriptional regulator identified in Enterococcus faecalis that is involved in the virulence, persistence in mouse kidneys and liver, and survival inside peritoneal macrophages. In this study we searched for environmental conditions that affect expression of the corresponding gene. Of the several stress conditions tested, only bile salts (0.08%) significantly induced transcription of slyA. In addition, the growth of ΔslyA mutant strain was significantly impaired in the presence of bile salts. To increase knowledge of SlyA regulon, real-time quantitative PCR was performed and revealed that expression of EF_3005, which encodes a choloylglycine hydrolase, is negatively regulated by SlyA.
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