Cell division inhibitor that blocks the formation of polar Z ring septums. Rapidly oscillates between the poles of the cell to destabilize FtsZ filaments that have formed before they mature into polar Z rings. Prevents FtsZ polymerization. Interacts with MinD and FtsZ; homodimer. In a minCDE operon disruption (minC-minD-minE), cells divide not only at midpoint but also at their poles, yielding small minicells and long rods. Loss of polar localization of several polar-localized proteins including GroEL-GroES, TnaA and YqjD. Belongs to the MinC family.