Dihydroorotase (DHOase), subgroup IIa; DHOases catalyze the reversible interconversion of carbamoyl aspartate to dihydroorotate, a key reaction in pyrimidine biosynthesis. This subgroup also contains proteins that lack the active site, like unc-33, a C.elegans protein involved in axon growth.
Jiyao W et al.(2023). "The conserved domain database in 2023.",