Predicted to enable 3,4-dihydroxy-5-polyprenylbenzoic acid O-methyltransferase activity and 3-demethylubiquinol-n 3-O-methyltransferase activity. Predicted to be involved in ubiquinone biosynthetic process. Is an ortholog of C. elegans coq-3. In C. elegans, coq-3 is involved in nematode larval development and ubiquinone biosynthetic process.