Coenzyme Q10 (CoQ10) is essential for energy production and has become a popular supplement in recent years. In this study, CoQ10 productivity was improved in the fission yeast Schizosaccharomyces pombe. Ten CoQ biosynthetic genes were cloned and overexpressed in S. pombe. Strains expressing individual CoQ biosynthetic genes did not produce higher than a 10% increase in CoQ10 production. In addition, simultaneous expression of all ten coq genes did not result in yield improvements. Genes responsible for the biosynthesis of p-hydroxybenzoate and decaprenyl diphosphate, both of which are CoQ biosynthesis precursors, were also overexpressed. CoQ10 production was increased by overexpression of Eco_ubiC (encoding chorismate lyase), Eco_aroF(FBR) (encoding 3-deoxy-D-arabino-heptulosonate 7-phosphate synthase), or Sce_thmgr1 (encoding truncated HMG-CoA reductase). Furthermore, simultaneous expression of these precursor genes resulted in two fold increases in CoQ10 production.
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