Involved in chromosome condensation, segregation and cell cycle progression. May participate in facilitating chromosome segregation by condensation DNA from both sides of a centrally located replisome during cell division. Not required for mini-F plasmid partitioning. Probably acts via its interaction with MukB and MukE. Overexpression results in anucleate cells. It has a calcium binding activity. Interacts, and probably forms a ternary complex, with MukE and MukB via its C-terminal region. The complex formation is stimulated by calcium or magnesium. It is required for an interaction between MukE and MukB. Restricted to the nucleoid region. Belongs to the MukF family.