Abstract
The bacterial small RNA GcvB has been known as a translational repressor of mRNAs encoding amino acid transporters and has been postulated to limit uptake of unnecessary amino acids under nutrient-rich conditions. In this issue of Molecular Microbiology, Sharma et al. (2011) provide evidence for a much broader role for GcvB as a global regulator of amino acid metabolism. Using a unique combination of experimental and biocomputational approaches, the authors triple the size of the GcvB regulon, making it the largest sRNA regulon defined to date.
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