Abstract
Streptococcus agalactiae is a bacterial human pathobiont causing invasive diseases in neonates. Upon infection, S. agalactiae is presented with Zn limitation and excess but the genetic systems that allow bacterial adaptation to these conditions remain largely undefined. A comprehensive analysis of S. agalactiae global transcriptional response to Zn availability shows that this pathogen manages Zn limitation mainly through upregulation of the AdcR regulon. We demonstrate that several AdcR-regulated genes are important for bacterial growth during Zn deficiency, including human biological fluids. Taken together, these findings reveal new mechanisms of S. agalactiae adaptation under conditions of metal deprivation.
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