Predicted to be involved in ubiquinone biosynthetic process. Predicted to be located in mitochondrial inner membrane. Predicted to be part of ubiquinone biosynthesis complex. Predicted to be active in mitochondrion. Is expressed in adult head and organism. Human ortholog(s) of this gene implicated in primary coenzyme Q10 deficiency 7 and spastic ataxia. Orthologous to human COQ4 (coenzyme Q4).