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Two genes (ubiB andubiD ) concerned with two successive reactions in ubiquinone biosynthesis inEscherichia coli were mapped and found to be closely linked. Mutant strains ofE. coli carrying theubiB − andubiD − alleles were shown to accumulate 2-octaprenylphenol and 3-octaprenyl-4-hydroxybenzoic acid, respectively. These compounds were isolated and identified by using nuclear magnetic resonance and mass and infrared spectroscopy. Cell extracts from the mutant strain carrying theubiD − allele lack 3-octaprenyl-4-hydroxybenzoate decarboxylase activity.

journal of bacteriology

Biosynthesis of Ubiquinone in <i>Escherichia coli</i> K-12: Location of Genes Affecting the Metabolism of 3-Octaprenyl-4-hydroxybenzoic Acid and 2-Octaprenylphenol

Biosynthesis of Ubiquinone in Escherichia coli K-12: Location of Genes Affecting the Metabolism of 3-Octaprenyl-4-hydroxybenzoic Acid and 2-Octaprenylphenol