The phosphoenolpyruvate-dependent sugar phosphotransferase system (sugar PTS), a major carbohydrate active transport system, catalyzes the phosphorylation of incoming sugar substrates concomitantly with their translocation across the cell membrane. This system is involved in trehalose transport. alpha,alpha-trehalose(out) + N(pros)-phospho-L-histidyl-[protein] = alpha,alpha-trehalose 6-phosphate(in) + L-histidyl-[protein] Induced by trehalose-6-phosphate. Repressed by TreR. The PTS EIIB type-1 domain is phosphorylated by phospho-EIIA-Glc (EIII-Glc) on a cysteinyl residue. Then, it transfers the phosphoryl group to the sugar substrate concomitantly with the sugar uptake processed by the PTS EIIC type-1 domain. The EIIC domain type-1 forms the PTS system translocation channel and contains the specific substrate-binding site. B.subtilis does not possess a trehalose-specific phosphotransferase enzyme IIA component, however it seems that it use the glucose-specific phosphotransferase enzyme IIA component to delivers trehalose-6-phosphate into the cell.