Dynamin-related GTPase involved in mitochondrial organization; required for mitochondrial fission and inheritance; self assembles on mitochondrial tubules at incipient division sites; involved in endocytosis; regulates peroxisome fission with Vps1p; role in nuclear envelope remodeling during nucleophagy; mutants in human ortholog DNM1L, which mediates mitochondrial fission, peroxisomal division, autophagy, and mitophagy, are associated with slowly progressive infantile encephalopathy