Component of the Rcs signaling system, which controls transcription of numerous genes. RcsC functions as a membrane-associated protein kinase that phosphorylates RcsD in response to environmental signals. The phosphoryl group is then transferred to the response regulator RcsB (By similarity). Involved in regulation of K30 capsular polysaccharide synthesis. ATP + protein L-histidine = ADP + protein N-phospho-L-histidine. Interacts with RcsD. Autophosphorylated. Activation probably requires a transfer of a phosphate group from a His in the transmitter domain to an Asp in the receiver domain. Belongs to the RcsC family. Truncated N-terminus.