The main function of the Min system is to promote the disassembly of the cytokinetic ring after cell division, thereby ensuring that division occurs only once per cell cycle. MinJ acts as a bridge between DivIVA and MinD. May modulate activity and localization of MinD and MinC through direct interaction with MinD. Interacts directly with DivIVA and MinD. Localization depends on DivIVA and on the state of the cell cycle. Present at both cell poles in non-dividing cells. As cells prepare to divide, moves from poles to mid-cell. Then, after division is completed, stays associated with new poles, but also moves back to old poles. Mutants show defects in homologous recombination, swarming motility and cell division. Belongs to the MinJ family.