Activates the phosphorylation activity of the protein-arginine kinase McsB. Is required for the delocalization of competence proteins from the cell poles. Interacts with McsB. Is repressed by the transcriptional regulator CtsR. Forms part of an operon with ctsR, mcsB and clpC. Phosphorylated on Arg residues by McsB. Cells lacking this gene show a defect in the delocalization of competence proteins.