Enables microtubule-severing ATPase activity. Acts upstream of or within microtubule severing and spermatogenesis. Located in microtubule cytoskeleton. Is expressed in several structures, including genitourinary system; heart; liver; lung; and spleen. Orthologous to human KATNAL1 (katanin catalytic subunit A1 like 1). [provided by Alliance of Genome Resources, Apr 2022]