Global regulator that is part of the nutrient-sensing system. In the absence of glucosamine 6-P (GlcN6P), represses the phosphotransferase system (PTS) specific for the uptake of N-acetylglucosamine (PTSNag), and genes involved in the metabolism of chitin, as well as several genes involved in development, thereby linking carbon availability to morphogenesis (By similarity). Regulates the dasABC transport operon involved in glucose-related morphogenesis. Essential for development (PubMed:11741848). Actively expressed during vegetative growth.