Function
TorR is a member of the two-component regulatory system TorS/TorR. This system plays a crucial role in the anaerobic utilization of trimethylamine-N-oxide (TMAO). When phosphorylated, TorR activates the transcription of the torCAD operon by binding to four decameric boxes within the torCAD promoter. Box1, 2, and 4 share the DNA sequence 5'-CTGTTCATAT-3', while box3 contains the sequence 5'-CCGTTCATCC-3'. Notably, both phosphorylated and unphosphorylated TorR negatively regulate its own expression by binding to box1 and 2.