Enables the recognition and targeting of unfolded and aggregated proteins to the ClpC protease or to other proteins involved in proteolysis. Acts negatively in the development of competence by binding ComK and recruiting it to the ClpCP protease. When overexpressed, inhibits sporulation. Also involved in Spx degradation by ClpC. Homodimer. The N-terminal domain has binding sites for ComK and probably for unfolded/aggregated proteins; the C-terminal domain interacts with ClpC. Belongs to the MecA family.