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UbiX family flavin prenyltransferase UbiX partners with UbiD for decarboxylation of the 3-octaprenyl-4-hydroxybenzoate precursor during ubiquinone biosynthesis, but the role of UbiX is as a flavin prenyltransferase that provides a cofactor UbiD requires.In E.coli, the protein UbiX (3-octaprenyl-4-hydroxybenzoate carboxy-lyase) has been shown to be involved in the third step of ubiquinone biosynthesis, the reaction [3-octaprenyl-4-hydroxybenzoate = 2-octaprenylphenol + CO2]. The knockout of the homologous protein in yeast confers sensitivity to phenylacrylic acid. Members are not restricted to ubiquinone-synthesizing species. This family represents a distinct clade within the flavoprotein family of pfam02441. |
Lu S et al.(2020). "CDD/SPARCLE: the conserved domain database in 2020.",