COQ9 is an enzyme that is required for the biosynthesis of coenzyme Q []. It may either catalyse a reaction in the coenzyme Q biosynthetic pathway or have a regulatory role.
COQ9 is an protein that is required for the biosynthesis of coenzyme Q [], which functions in the respiratory electron transport chain and serves as a lipophilic antioxidant. In Saccharomyces cerevisiae (Baker's yeast), Q biosynthesis requires nine Coq proteins (Coq1-Coq9), with the COQ9 product acting subsequent to the prenylation of 4-hydroxybenzoic acid.
Coq4 is a component of a multi-subunit COQ enzyme complex, which plays a role in the coenzyme Q (ubiquinone) biosynthetic pathway [, , ]. In budding yeasts, Coq4 plays an essential role in organising the COQ enzyme complex and is required for steady-state levels of Coq3, Coq6, Coq7 and Coq9 [].
Ubiquinone biosynthesis protein Coq4 is a component of a multi-subunit COQ enzyme complex (composed of at least Coq3, Coq4, Coq5, Coq6, Coq7 and Coq9), which plays a role in the coenzyme Q (ubiquinone) biosynthetic pathway [, , ]. Coq4 plays an essential role in organising the COQ enzyme complex and is required for steady-state levels of Coq3, Coq6, Coq7 and Coq9 []. This entry represents eukaryotic Coq4.
