Microtubule-associated force-producing protein involved in producing microtubule bundles and able to bind and hydrolyze GTP. Most probably involved in vesicular trafficking processes, in particular endocytosis (By similarity). Required for coelomocyte endocytosis (PubMed:20803083). Involved in apoptotic cell phagocytosis (PubMed:21490059). Required for recruitment of phosphatidylinositol 3-kinase piki-1 to phagosomes (PubMed:22272187). May play a role in rab-5 recruitment to cell-corpses-containing phagosomes but not to endosomes (PubMed:18425118). Required for embryonic and larval development (PubMed:9294229, PubMed:21490059, PubMed:20803083). GTP + H2O = GDP + H(+) + phosphate May be a component of a complex composed of rab-5 (in GDP-bound form), dyn-1 and vps-34 (PubMed:18425118). Interacts with tax-6 (PubMed:20803083). Microtubule-associated (By similarity). Transiently associates with cell corpses containing early phagosomes where it colocalizes with vps-34 and rab-5 (PubMed:18425118). Expressed in motor neurons in the head and in ventral nerve cord and, to a lesser extent, in sensory neurons in the nerve ring and the tail and interneurons. Expressed in pharyngeal-intestinal valve, intestinal-rectal valve and in intestinal cells. RNAi-mediated knockdown causes abnormal accumulation of apoptotic cell corpses in early phagosomes in gonads. Belongs to the TRAFAC class dynamin-like GTPase superfamily. Dynamin/Fzo/YdjA family.