Biodegradation of indole at high concentration by persolvent fermentation with Pseudomonas sp. ST-200.
Pseudomonas sp. strain ST-200 grew on indole as a sole carbon source. The minimal inhibitory concentration of indole was 0.3 mg/ml for ST-200. However, ST-200 grew in a persolvent fermentation system containing a large amount of indole (a medium containing 20% by vol. diphenylmethane and 4 mg/ml indole), because most of the indole was partitioned in the organic solvent layer. When the organism was grown in the medium containing indole at 1 mg/ml in the presence of diphenylmethane, more than 98% of the indole was consumed after 48h. Isatic acid (0.4 mg/ml) and isatin (0.03 mg/ml) were produced as the metabolites in the aqueous medium layer.
Doukyu
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N
Department of Bioengineering, Faculty of Bioscience and Biotechnology, Tokyo Institute of Technology, Nagatsuta, Yokohama, Japan.
Aono
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R
D001673:Biodegradation, Environmental; D005285:Fermentation; D007211:Indoles / Q000737:chemistry / Q000378:metabolism*; D009682:Magnetic Resonance Spectroscopy; D011549:Pseudomonas / Q000254:growth & development / Q000378:metabolism*; D012997:Solvents
D007211:Indoles; D012997:Solvents; C030374:indole