Dynamin-like GTPase required for vacuolar protein sorting; promotes endosomal membrane constriction and fission of Mvp1p-coated tubules leading to the production of SNX-BAR–coated retrograde transport carriers; phosphoinositides in a PS-rich environment stimulate membrane binding and GTP hydrolysis leading to fission of tubular membranes; role in actin filament bundling facilitates vesicle scission during endocytosis, late Golgi-retention of some proteins, and peroxisome fission