Aerobic and anaerobic catabolism of phthalic acid by a nitrate-respiring bacterium |
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| Authors: | R Paul Aftring Barrie F Taylor |
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| Institution: | (1) Rosenstiel School of Marine and Atmospheric Science, University of Miami, 4600 Rickenbacker Causeway, 33149 Miami, Florida, USA;(2) Present address: Division of Endocrinology, Metabolism and Nutrition, Department of Medicine, Medical University of South Carolina, 29043 Charleston, S.C. |
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| Abstract: | A Bacillus sp., isolated by anaerobic enrichment on a o-phthalic acid-nitrate medium, grew either aerobically or anaerobically on phthalic acid. Cells grown anaerobically on phthalate immediately oxidized phthalate and benzoate with nitrate, whereas aerobic oxidation only occurred after a lag period and was inhibited by chloramphenicol. 2-Fluoro-and 3-fluorobenzoate were formed from 3-fluorophthalate by cells grown anaerobically on phthalate. Aerobically grown cells immediately oxidized phthalate, benzoate, 3-hydroxybenzoate and gentisate with oxygen. The aerobic and anaerobic route of catabolism of phthalate may thus share an initial decarboxylation to benzoate. This is the first report of the anaerobic dissimilation of phthalic acid by a pure bacterial culture. |
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| Keywords: | Phthalate catabolism Nitrate respiration Benzoate Gentisate |
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