Negative regulator of FtsZ ring formation; modulates the frequency and position of FtsZ ring formation. Inhibits FtsZ ring formation at polar sites. Interacts either with FtsZ or with one of its binding partners to promote depolymerization. Cell membrane associated, also colocalizes with FtsZ to the nascent septal site (PubMed:10449747). Present in detergent-resistant membrane (DRM) fractions that may be equivalent to eukaryotic membrane rafts; these rafts include proteins involved in signaling, molecule trafficking and protein secretion (PubMed:22882210, PubMed:24222488). May be degraded by FtsH protease. Suppresses temperature-sensitive mutation in FtsZ, in a wild-type FtsZ background increases the number and alters the position of FtsZ rings (PubMed:10449747). In minimal medium cells elongate and occasionally form minicells. Double dynA-ezrA mutants have longer cells with more double septa than either deletion alone (PubMed:23249255). Belongs to the EzrA family.