Microtubule-associated force-producing protein that is targeted to at the leading edges of the forming cell plate during cytokinesis (PubMed:18612642). Has a GTPase activity (By similarity). GTP + H2O = GDP + H(+) + phosphate Forms homodimer and may homooligomerize and heterooligomerize to form the phragmoplastin complex (By similarity). Binds to PHIP1 (PubMed:18621982). Microtubule-associated and localized in the forming cell plate during cytokinesis, especially at the leading edges. Belongs to the TRAFAC class dynamin-like GTPase superfamily. Dynamin/Fzo/YdjA family.