Predicted to enable 2-octaprenyl-6-methoxy-1,4-benzoquinone methylase activity. Predicted to be involved in methylation and ubiquinone biosynthetic process. Predicted to be located in mitochondrial matrix. Predicted to be part of protein-containing complex. Predicted to colocalize with mitochondrial inner membrane. Human ortholog(s) of this gene implicated in primary coenzyme Q10 deficiency 9. Orthologous to human COQ5 (coenzyme Q5, methyltransferase). [provided by Alliance of Genome Resources, Apr 2022]