Histidine kinases and response regulator proteins in two-component signaling systems. : modified: "Phosphotransfer-mediated signaling pathways allow cells to sense and respond to environmental stimuli. Autophosphorylating histidine protein kinases provide phosphoryl groups for response regulator proteins which, in turn, function as molecular switches that control diverse effector activities. Structural studies of proteins involved in two-component signaling systems have revealed a modular architecture with versatile conserved domains that are readily adapted to the specific needs of individual systems."
West AH, Stock AM. Histidine kinases and response regulator proteins in two-component signaling systems. Trends Biochem Sci. 2001 Jun; 26(6):369-76.