Chemotactic-signal transducers respond to changes in the concentration of attractants and repellents in the environment, transduce a signal from the outside to the inside of the cell, and facilitate sensory adaptation through the variation of the level of methylation. All amino acids serve as attractants in B.subtilis, they appear to cause an increase in the turnover methyl groups, leading to methylation of an unidentified acceptor, while repellents have been shown to cause a decrease in methyl group turnover. The methyl groups are added by a methyltransferase and removed by a methylesterase. McpC is required for taxis to cysteine, proline, threonine, glycine, serine, lysine, valine and arginine and for aspartate, glutamine, histidine and glutamate. Primarily mediates response to positive stimulus of PTS carbohydrates. Greatly influences the duration or magnitude of the response to negative PTS carbohydrate stimulus. Interacts with FloT. Present in detergent-resistant membrane (DRM) fractions that may be equivalent to eukaryotic membrane rafts; these rafts include proteins involved in signaling, molecule trafficking and protein secretion. Induced by SigD. Expression increases in the late-exponential growth-phase and is maximal during the early-stationary phase. Some glutamine residues are deamidated to glutamate by CheD and subsequently methylated. Belongs to the methyl-accepting chemotaxis (MCP) protein family.