Atypical kinase COQ8A, mitochondrial (COQ8A)

Atypical kinase COQ8A, mitochondrial, is an enzyme critical for the biosynthesis of coenzyme Q10 (ubiquinone), which plays an essential role in mitochondrial oxidative phosphorylation by facilitating electron transport and ATP production. The COQ8A protein exhibits kinase activity, likely acting as a lipid or small molecule kinase within the mitochondrial inner membrane—though precise substrate specificity remains under investigation. It shows chaperone-like activity necessary for assembly and function of the coenzyme Q synthome. Genetic mutations disrupting COQ8A function can result in primary coenzyme Q10 deficiency, manifesting primarily as neurodegenerative disorders (notably cerebellar ataxia), myopathy, and kidney disease due to impaired energy production and increased oxidative stress. Coenzyme Q10 supplementation can rescue mitochondrial function in COQ8A deficiency, highlighting its essential role in cellular metabolism and suggesting potential avenues for therapy.

Other names

aarF domain-containing protein kinase 3ADCK3ARCA2CABC1Chaperone activity of bc1 complex-likeChaperone, ABC1 activity of bc1 complex homologCoenzyme Q protein 8ACoenzyme Q8 homologCOQ10D4COQ8SCAR9Chaperone-ABC1-likeAtypical kinase ADCK3Chaperone-ABC1 (activity of bc1 complex)-likeEC 2.7.-.-Coenzyme Q8 homolog (yeast)AarF domain containing kinase 3

Restoration of mitochondrial electron transport via ubiquinone biosynthesis/complex formation, antioxidant protection (for CoQ10 supplementation)