Enables dihydroorotase activity and dihydroorotate dehydrogenase activity. Involved in 'de novo' UMP biosynthetic process and UDP biosynthetic process. Located in mitochondrion. Is expressed in several structures, including alimentary system; branchial arch; limb bud; respiratory system; and urinary system. Human ortholog(s) of this gene implicated in postaxial acrofacial dysostosis. Orthologous to human DHODH (dihydroorotate dehydrogenase (quinone)). [provided by Alliance of Genome Resources, Apr 2022]