4.1.1.98 evolution UbiX belongs to the FMN-dependent decarboxylase family 746643 4.1.1.98 malfunction disruption of the slr1099 gene results in reduced growth rates and plastoquinone contents 727983 4.1.1.98 malfunction the Escherichia coli ubiX null mutant accumulates 4-hydroxy-3-octaprenylbenzoic acid, a coenzyme Q8 precursor, and shows decreased UbiG O-methyltransferase activity 729097 4.1.1.98 metabolism a set of enzymes, UbiA, UbiB, UbiC, UbiD, UbiE, UbiF, UbiG, UbiH and UbiX, catalyze the synthesis of ubiquinone from the compound chorismate. Enzyme UbiX catalyzes and regulates ubiquinone biosynthesis 746643 4.1.1.98 metabolism the enzyme is involved in the decarboxylation step in coenzyme Q biosynthesis 729097 4.1.1.98 physiological function the enzyme is required for production of coenzyme Q8 and growth on succinate media 729097