CONTEXT: Eugenol is known for its analgesic, local anesthetic, anti-inflammatory, antibacterial, and hair growing effects, the application of which, however, is limited by its low solubility, liability of sublimating, and its pungent smell. Compared to eugenol, its glycosylated derivate [eugenol α-glucoside (α-EG)] has more advantages in application. OBJECTIVE: The biosynthesis of α-EG by Xanthomonas maltophilia Hugh (Xanthomonadaceae) BT-112 and the optimum conditions for α-EG production are investigated here. MATERIALS AND METHODS: The α-EG was obtained by fermentation using Xanthomonas maltophilia BT-112 and purified by macroporous absorption resin. The identity of α-EG is confirmed by high performance liquid chromatography (HPLC) and nuclear magnetic resonance (NMR). RESULTS: The maximum yield of α-EG reached 10.62 g/L broth when the suspension of Xanthomonas maltophilia strain was incubated at 30°C with 70 mM eugenol and 1.0 M maltose. DISCUSSION AND CONCLUSION: Bio-fermentation was applied in this work to get α-EG with a high mole conversion, which is a potentially efficient and highly promising approach to modify phenolic compounds into glucosides.
CONTEXT: Eugenol is known for its analgesic, local anesthetic, anti-inflammatory, antibacterial, and hair growing effects, the application of which, however, is limited by its low solubility, liability of sublimating, and its pungent smell. Compared to eugenol, its glycosylated derivate [eugenol α-glucoside (α-EG)] has more advantages in application. OBJECTIVE: The biosynthesis of α-EG by Xanthomonas maltophilia Hugh (Xanthomonadaceae) BT-112 and the optimum conditions for α-EG production are investigated here. MATERIALS AND METHODS: The α-EG was obtained by fermentation using Xanthomonas maltophiliaBT-112 and purified by macroporous absorption resin. The identity of α-EG is confirmed by high performance liquid chromatography (HPLC) and nuclear magnetic resonance (NMR). RESULTS: The maximum yield of α-EG reached 10.62 g/L broth when the suspension of Xanthomonas maltophilia strain was incubated at 30°C with 70 mM eugenol and 1.0 M maltose. DISCUSSION AND CONCLUSION: Bio-fermentation was applied in this work to get α-EG with a high mole conversion, which is a potentially efficient and highly promising approach to modify phenolic compounds into glucosides.