Enables small GTPase binding activity. Involved in several processes, including activation of GTPase activity; regulation of fibroblast migration; and regulation of ruffle assembly. Located in cytoskeleton. Part of flotillin complex. Is expressed in several structures, including brain; dorsal root ganglion; genitourinary system; liver; and spleen. Orthologous to human CORO1C (coronin 1C). [provided by Alliance of Genome Resources, Apr 2022]