Microtubule-associated force-producing protein involved in producing microtubule bundles and able to bind and hydrolyze GTP. Plays a role in the regulation of neuron morphology, axon growth and formation of neuronal growth cones (By similarity). Plays an important role in vesicular trafficking processes, in particular endocytosis. Involved in cytokinesis (PubMed:18923138). Regulates maturation of apoptotic cell corpse-containing phagosomes by recruiting PIK3C3 to the phagosome membrane (PubMed:18425118). GTP + H2O = GDP + H(+) + phosphate Interacts with MYOF (PubMed:17702744). Interacts with CTTN and ACTN1 (By similarity). Interacts with SHANK1, SHANK2 and NOSTRIN. Interacts with SH3BP4 (PubMed:17702744, PubMed:16325581). Interacts with SNX9. Interacts with SNX18. Interacts with SNX33 (via SH3 domain). Interacts with MYO1E (via SH3 domain). Interacts with PSTPIP1. Interacts with CTNND2 (By similarity). May interact with PIK3C3 (PubMed:18425118). May be a component of a complex composed of RAB5A (in GDP-bound form), DYN2 and PIK3C3 (PubMed:18425118). Interacts with BIN1 (By similarity). Colocalizes with CTTN at the basis of filopodia in hippocampus neuron growth zones. Microtubule-associated. Also found in the postsynaptic density of neuronal cells (By similarity). Co-localizes with PIK3C3 and RAB5A to the nascent phagosome (PubMed:18425118). Expressed in most tissues during embryonic development, including the peripheral nervous system although no expression is evident in skeletal muscle or heart. Phosphorylation at Ser-764 by CDK1 is greatly increased upon mitotic entry. It regulates cytokinesis downstream of calcineurin, and does not affect clathrin-mediated endocytosis. Dephosphorylated by calcineurin/PP2 (By similarity). Phosphorylated on tyrosine residues after activation of SRC (By similarity). Exhibits growth and cytokinesis defects. Belongs to the TRAFAC class dynamin-like GTPase superfamily. Dynamin/Fzo/YdjA family.