| description | Protein involved in a system responding to environmental changes characterized usually by a sensor kinase in the cell membrane that phosphorylates itself in response to a signal and a response regulator to which the phosphoryl group is transferred. The responder is typically a DNA-binding protein that regulates transcription. Several of these systems are quite complex, involving many proteins in a signaling cascade or contributing to several responses simultaneously They are involved in a variety processes such as chemotaxis, osmoregulation, magnesium transport, pH tolerance, sporulation, or response of virulent species to host cell's environments |
