Appears to have a multifaceted role in controlling cell morphology, completion of cell division and separation, as well as chromosome segregation, through a complex interaction web. Seems to be primarily involved in the formation and maturation of the cell poles. Interacts with itself and with a number of cell division proteins, including FtsZ and Spo0J. Localizes primarily near the membrane at the midcell division sites (as a ring) and at the cell poles (as dots) simultaneously. DivIVA is recruited to the septum at a later stage than FtsZ and is retained at the poles after cell separation. Phosphorylated on Thr-201 by StkP in vivo. Phosphorylation would regulate the scaffold DivIVA function directing cell wall synthesis and the formation of mature poles. Inactivation of divIVA results in severe growth inhibition and defects in cell shape, nucleoid segregation, and cell division, since it leads to the formation of chains of unseparated, morphologically altered cells with incomplete septa, often devoid of nucleoids (PubMed:14526035). However, a further study (PubMed:17098892) showed that the anucleate cells observed in the divIVA null mutant (corresponding to 15% to 20% of the population) were indeed dead cells in the process of lysing. All the cell division proteins tested are localized in the divIVA null mutant, although the percentage of cells having constricted Z rings is significantly reduced (PubMed:17098892). Belongs to the DivIVA family. Extended N-terminus.